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  • Python: Trouble with YACC

    - by Rosarch
    I'm parsing sentences like: "CS 2310 or equivalent experience" The desired output: [[("CS", 2310)], ["equivalent experience"]] YACC tokenizer symbols: tokens = [ 'DEPT_CODE', 'COURSE_NUMBER', 'OR_CONJ', 'MISC_TEXT', ] t_DEPT_CODE = r'[A-Z]{2,}' t_COURSE_NUMBER = r'[0-9]{4}' t_OR_CONJ = r'or' t_ignore = ' \t' terms = {'DEPT_CODE': t_DEPT_CODE, 'COURSE_NUMBER': t_COURSE_NUMBER, 'OR_CONJ': t_OR_CONJ} for name, regex in terms.items(): terms[name] = "^%s$" % regex def t_MISC_TEXT(t): r'\S+' for name, regex in terms.items(): # print "trying to match %s with regex %s" % (t.value, regex) if re.match(regex, t.value): t.type = name return t return t (MISC_TEXT is meant to match anything not caught by the other terms.) Some relevant rules from the parser: precedence = ( ('left', 'MISC_TEXT'), ) def p_statement_course_data(p): 'statement : course_data' p[0] = p[1] def p_course_data(p): 'course_data : course' p[0] = p[1] def p_course(p): 'course : DEPT_CODE COURSE_NUMBER' p[0] = make_course(p[1], int(p[2])) def p_or_phrase(p): 'or_phrase : statement OR_CONJ statement' p[0] = [[p[1]], [p[3]]] def p_misc_text(p): '''text_aggregate : MISC_TEXT MISC_TEXT | MISC_TEXT text_aggregate | text_aggregate MISC_TEXT ''' p[0] = "%s %s" % (p[0], [1]) def p_text_aggregate_statement(p): 'statement : text_aggregate' p[0] = p[1] Unfortunately, this fails: # works as it should >>> token_list("CS 2110 or equivalent experience") [LexToken(DEPT_CODE,'CS',1,0), LexToken(COURSE_NUMBER,'2110',1,3), LexToken(OR_CONJ,'or',1,8), LexToken(MISC_TEXT,'equivalent',1,11), LexToken(MISC_TEXT,'experience',1,22)] # fails. bummer. >>> parser.parse("CS 2110 or equivalent experience") Syntax error in input: LexToken(MISC_TEXT,'equivalent',1,11) What am I doing wrong? I don't fully understand how to set precedence rules. Also, this is my error function: def p_error(p): print "Syntax error in input: %s" % p Is there a way to see which rule the parser was trying when it failed? Or some other way to make the parser print which rules its trying?

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  • Is INT_MIN-1 an underflow or overflow?

    - by Johannes Schaub - litb
    I seem to remember that I was reading that underflow means you have a too small magnitude that cannot be presented anymore in a type overflow means you have a too large magnitude that cannot be presented anymore in a type However, in practice I perceive that the terms are used such that underflow means you have a too small value that cannot be presented anymore in a type overflow means you have a too large value that cannot be presented anymore in a type What is the correct meaning to use here? Are the terms defined differently for integer and floating point types?

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  • What is the difference between "contracting" and "consulting"? [closed]

    - by Rice Flour Cookies
    Possible Duplicate: Contractor vs Consultant I read a discussion thread on Slashdot the other day where some developers were discussing taking on "consulting" and "contracting" jobs. My understanding is that both of these terms imply an individual selling his services as a programmer on his own terms as opposed to working for an employer. What is the difference between these two: "consulting" and "contracting"?

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  • The role of the Infrastructure DBA

    - by GavinPayneUK
    Do you have someone performing an Infrastructure DBA role within your organisation? Do you realise why today you now might need one? When I first started working with SQL Server there were three distinct roles in the SQL Server virtual team: developer , DBA and sysadmin . In my simple terms, the developer looked after the “code”: the schema, stored procedures, and any ETL to get data in, out or updated within the database. They could talk in business entity terms about Customer numbers, Product codes...(read more)

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  • Is Google a reliable document search engine?

    - by Miriam Schwab
    I have a site with PDFs and Word documents that I know have been indexed by Google because they appear in search results with filetype:pdf (or doc), and if I search for some very specific terms with quotation marks, they appear as well. But they don't appear for general search terms that do exist in the documents. Is Google a reliable document search engine? If not, are there other options for managing many documents and making them searchable to users?

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  • As webdevelopment is it same to legal issues to make a sex dating sites?

    - by YumYumYum
    Like i have created many other normal sites which are not related to any dating/sexual content. Is it for a developer same rules and regulation while making a sex related dating sites? where people meet together, learn each others, for having a sex relaionship (you know what i mean), having also a feature of webcam sex but not explicitly a porno sites. Does those sites have any special legal terms and condition's for the developers comparing with non sexual/dating sites legal terms and conditions?

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  • recommended book for cocos2d?

    - by Paul Sanwald
    I'm an experienced programmer that recently got into iOS development by working through the big nerd ranch book by Aaron Hillegass and Joe Conway. I loved the way the book was structured in terms of typing in the code and doing the challenges. I'm interested in learning more about iOS gaming and cocos2d, but am a complete newbie in terms of game development/design. there are a number of books on amazon on cocos2d, can anyone recommend one in particular?

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  • Site Review: Yahoo.com - Forms Evaluation

    Yahoo uses Ajax to suggest search terms to users when they are entering a search phrase into the search text box. Once the user has entered a search term and then presses the search button, the browser will post the search form to the search results page. I think that Yahoo is making great use of Ajax in this situation because they are helping users find information as well as suggesting alternative search terms for them to try based on what has already been added.

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  • Complete Beginner to Game Programming and Unreal Engine 4, Looking For Advice [on hold]

    - by onemic
    I am currently a 2nd year programming student(Just finished my first year so I will be starting my second year in September) and have mainly learned C and C++ in my classes. In terms of what I know of C++, I know about general inheritance, polymorphism, overloading operators, iterators, a little bit about templates(only class and function templates) etc. but not of the more advanced topics like linked lists and other sequential containers(containers in general I guess), enumerations, most of the standard library(other than like strings and vectors), and probably a bunch of other stuff I dont even know about yet. I subscribed to Unreal Engine 4 as I was very intrigued by their Unreal Tournament announcement earlier this month, especially after hearing that UE4 is going completely C++. Of course my end goal in doing this programming program is to eventually go into game/graphics programming. Since it's my summer off, I thought what better way then to actually apply some of my skills to a personal project so I actually have a firmer understanding of C++ past what my professors tell me. My questions are this: What would be the best way to start off making a small personal game in UE4 as a project for the summer? What should I be aiming for, especially for someone that is still learning C++? Should I focus on making a simple 2D game rather than a 3D one to get started? Seeing the Flappy Chicken showcase intrigued me because before I thought the UE engine was pretty much pigeonholed into being for FPS games What should my expectations be going into UE4 and a game engine for the first time?(UE4 will be my first foray into making a game) What can I expect to gain from making things in UE4, in terms of making games and in terms of further fleshing out my knowledge of C++? Would you recommend I start off 100% using C++ for scripting or using the visual blueprints? Since I'm not a designer, how would I be able to add objects and designs to my game? For someone at my level is retaining the UE4 subscription worth it or is it better to cancel and resub when I learn enough about UE4 and C++? Lastly is there anything to be gained in terms of knowledge/insight through me looking at the source code for UE4? I opened it in VS2013, but noticed that most of the files were C# files and not cpp's. Thanks in advance for taking the time to answer.

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  • A Look at the Difference Between Web Design and Web Development

    Many people are interested in using the Internet to promote their business. Knowing the difference between web design and web development is important because while the terms are often used in place of one another, they are two very different things. Being able to speak with the people who are creating your website and use the proper terms can help reduce misunderstandings and speed up the creation process.

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  • It is a Good Idea to Buy Backlinks

    Have you heard of backlinks? These are specific links from other websites that come to your website with the purpose of linking due to relevance in terms of content or in terms of merchandise, etc. For instance, if you are a modern art artist and specialize in customized art work, then you can have your service posted on relevant web pages, like an arts and craft website, etc.

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  • Getting More Website Traffic From Google - How to Know Which Keywords Will Make You a Profit

    When it comes to making a profit with Google AdWords everyone knows that you need to make sure you are using the right keywords to make it happen. But the problem is that unless you have a proven strategy for finding the right keywords you are going to end up losing a lot of money and pick the wrong search terms. In this article I want to show you exactly how to find the right search terms so you can maximize your profits.

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  • Build One Way Links With Article Marketing

    Lots of web developers write web content as a strategy to build one way links with article marketing. In terms of link quality, one way links are the most valuable of all. They do not pose any control difficulties, they are built on quality, they do not require reciprocity and they boost up quality traffic. The possibility to build one way links with article marketing keeps lots of web developers focused and highly professional in terms of content quality.

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  • SEO - How to Optimise For Long-Tail Queries

    There is a great deal of value in the long-tail of search. The long-tail is basically a query that is over three or four keywords long. Good examples of long-tail queries include "cheap flights to Japan May" or "buy back doors UK." Both of these terms exhibit a great deal of user intent - this means the users behind both terms are very far down the buying cycle and are looking for a website on which they can transact and buy a flight to Japan or purchase a back door.

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  • SEO Copywriting - What is it?

    Search engine optimization copywriting, more commonly called SEO copywriting, is the technique of writing the text of a webpage in a way that is enjoyable and easy to read for the common internet surfer. The term also refers to targeting and using specific search terms with the goal of ranking the targeted terms higher on the list of search engine websites. The point of obtaining a higher search engine ranking is to make your site more accessible to potential clients.

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  • SEO & Digital Marketing - Social Media Intangibles

    'Social Media' is certainly one of the most often used, yet least understood terms in the marketing space. In terms of purely defining the term, Social Media can be defined as communications among people in the digital space. These communications typically involve the exchange of ideas, experiences, information and insight, along with various media such as images and videos.

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  • What Services Can an SEO Company Provide?

    An SEO company can provide a multitude of services. You will hear terms such as article submissions, directory submissions, article campaign services, website creation, link building, on page optimization, etc. For those who are as yet not familiar with such terms, read on.

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  • Parallelism in .NET – Part 1, Decomposition

    - by Reed
    The first step in designing any parallelized system is Decomposition.  Decomposition is nothing more than taking a problem space and breaking it into discrete parts.  When we want to work in parallel, we need to have at least two separate things that we are trying to run.  We do this by taking our problem and decomposing it into parts. There are two common abstractions that are useful when discussing parallel decomposition: Data Decomposition and Task Decomposition.  These two abstractions allow us to think about our problem in a way that helps leads us to correct decision making in terms of the algorithms we’ll use to parallelize our routine. To start, I will make a couple of minor points. I’d like to stress that Decomposition has nothing to do with specific algorithms or techniques.  It’s about how you approach and think about the problem, not how you solve the problem using a specific tool, technique, or library.  Decomposing the problem is about constructing the appropriate mental model: once this is done, you can choose the appropriate design and tools, which is a subject for future posts. Decomposition, being unrelated to tools or specific techniques, is not specific to .NET in any way.  This should be the first step to parallelizing a problem, and is valid using any framework, language, or toolset.  However, this gives us a starting point – without a proper understanding of decomposition, it is difficult to understand the proper usage of specific classes and tools within the .NET framework. Data Decomposition is often the simpler abstraction to use when trying to parallelize a routine.  In order to decompose our problem domain by data, we take our entire set of data and break it into smaller, discrete portions, or chunks.  We then work on each chunk in the data set in parallel. This is particularly useful if we can process each element of data independently of the rest of the data.  In a situation like this, there are some wonderfully simple techniques we can use to take advantage of our data.  By decomposing our domain by data, we can very simply parallelize our routines.  In general, we, as developers, should be always searching for data that can be decomposed. Finding data to decompose if fairly simple, in many instances.  Data decomposition is typically used with collections of data.  Any time you have a collection of items, and you’re going to perform work on or with each of the items, you potentially have a situation where parallelism can be exploited.  This is fairly easy to do in practice: look for iteration statements in your code, such as for and foreach. Granted, every for loop is not a candidate to be parallelized.  If the collection is being modified as it’s iterated, or the processing of elements depends on other elements, the iteration block may need to be processed in serial.  However, if this is not the case, data decomposition may be possible. Let’s look at one example of how we might use data decomposition.  Suppose we were working with an image, and we were applying a simple contrast stretching filter.  When we go to apply the filter, once we know the minimum and maximum values, we can apply this to each pixel independently of the other pixels.  This means that we can easily decompose this problem based off data – we will do the same operation, in parallel, on individual chunks of data (each pixel). Task Decomposition, on the other hand, is focused on the individual tasks that need to be performed instead of focusing on the data.  In order to decompose our problem domain by tasks, we need to think about our algorithm in terms of discrete operations, or tasks, which can then later be parallelized. Task decomposition, in practice, can be a bit more tricky than data decomposition.  Here, we need to look at what our algorithm actually does, and how it performs its actions.  Once we have all of the basic steps taken into account, we can try to analyze them and determine whether there are any constraints in terms of shared data or ordering.  There are no simple things to look for in terms of finding tasks we can decompose for parallelism; every algorithm is unique in terms of its tasks, so every algorithm will have unique opportunities for task decomposition. For example, say we want our software to perform some customized actions on startup, prior to showing our main screen.  Perhaps we want to check for proper licensing, notify the user if the license is not valid, and also check for updates to the program.  Once we verify the license, and that there are no updates, we’ll start normally.  In this case, we can decompose this problem into tasks – we have a few tasks, but there are at least two discrete, independent tasks (check licensing, check for updates) which we can perform in parallel.  Once those are completed, we will continue on with our other tasks. One final note – Data Decomposition and Task Decomposition are not mutually exclusive.  Often, you’ll mix the two approaches while trying to parallelize a single routine.  It’s possible to decompose your problem based off data, then further decompose the processing of each element of data based on tasks.  This just provides a framework for thinking about our algorithms, and for discussing the problem.

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  • PHP self form validation

    - by Jordan Pagaduan
    <?php function VerifyForm(&$values, &$errors) { if (strlen($values['fname']) == 0) $errors['fname'] = 'Enter First Name'; if (strlen($values['lname']) == 0) $errors['lname'] = 'Enter Last Name'; if (strlen($values['mname']) == 0) $errors['mname'] = 'Enter Middle Name'; if (strlen($values['address']) == 0) $errors['address'] = 'Enter Address'; if (strlen($values['terms']) == 0) $errors['terms'] = 'Please Read Terms and Agreement and Check the box.'; if (!ereg('.*@.*\..{2,4}', $values['email'])) $errors['email'] = 'Email address invalid'; else if (strlen($values['email']) < 0) $errors['email'] = 'Enter Email Address'; return (count($errors) == 0); } function DisplayForm($values, $errors) { ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>GIA Soap » Products » Customer Informations</title> <link href="stylesheet/style.css" rel="stylesheet" type="text/css" /> <script type="text/javascript" src="js_files/jquery.js"></script> <script type="text/javascript" src="js_files/sliding_effect.js"></script> <script type="text/javascript" src="js_files/slideshow.js"></script> </head> <body> <div class="bg_top"> <div class="bg_bottom"> <div class="wrapper"> <div class="header"> <div class="logo"> </div> <div class="logo_text"> <div class="logo_head_text">Gia Soap Making</div> <div class="logo_sub_text">Sub text here</div> </div> </div> <div class="h_nav"> <div class="h_nav_dash"> </div> </div> <div class="container"> <div class="content_term"> <div class="content_terms"> <br /> <h1><p>Customer Information</p></h1><br /> <p>Please the following correctly.</p> <div class="customer_info"> <?php if (count($errors) > 0) echo "<p>There were some errors in your submitted form, please correct them and try again.</p>"; ?> <form method="post" action="<?= $_SERVER['PHP_SELF'] ?>"> <!-- hidden values --> <input type="hidden" value="<?php echo $papaya; ?>" name="papaya" /> <input type="hidden" value="<?php echo $carrot; ?>" name="carrot" /> <input type="hidden" value="<?php echo $guava; ?>" name="guava" /> <label for="customer_fname">First Name (<i>Required</i>)</label> <input type="text" class="textbox" id="customer_fname" name="customer_fname" value="<?= htmlentities($values['fname']) ?>" /> <span class="error_msg"><?= $errors['fname'] ?></span> <label for="customer_lname">Last Name (<i>Required</i>)</label> <input type="text" class="textbox" id="customer_fname" name="customer_fname" value="<?= htmlentities($values['lname']) ?>" /> <span class="error_msg"><?= $errors['lname'] ?></span> <label for="customer_mname">Middle Name (<i>Required</i>)</label> <input type="text" class="textbox" id="customer_fname" name="customer_fname" value="<?= htmlentities($values['mname']) ?>" /> <span class="error_msg"><?= $errors['mname'] ?></span> <label for="customer_add">Address (<i>Required : Complete Address Please</i>)</label> <input type="text" class="textbox" id="customer_add" name="customer_add1" value="<?= htmlentities($values['address']) ?>" /><br /> <input type="text" class="textbox" id="customer_add" name="customer_add2" /><br /> <input type="text" class="textbox" id="customer_add" name="customer_add3" /> <span class="error_msg"><?= $errors['address'] ?></span> <label for="customer_email">Email Address (<i>Required</i>)</label> <input type="text" class="textbox" id="customer_email" name="customer_email" value="<?= htmlentities($values['email']) ?>" /> <span class="error_msg"><?= $errors['email'] ?></span> <label for="customer_phone">Phone Number </label> <input type="text" class="textbox" id="customer_phone" name="customer_phone" /> <label for="customer_mobile">Mobile Number </label> <input type="text" class="textbox" id="customer_mobile" name="customer_mobile" /> <br /><br /> <div class="terms"> <center> <h1>Terms and Agreement</h1><br /> <p>Please read the following.</p><br /> </div> <br /> <input type="checkbox" name="terms" value="<?= htmlentities($values['terms']) ?>" /> I Read the Terms and Agreement<br /><br /> <span class="error_msg"><?= $errors['terms'] ?></span> <input type="submit" value="Send Order" class="prod_subbtn" /> </center> </form> </div> </div> </div> <div class="clear"></div> </div> <?php include ('includes/footer.php'); ?> </div> </div> </div> </body> </html> <?php } function ProcessForm($values) { $papaya = $_POST['papaya']; $carrot = $_POST['carrot']; $guava = $_POST['guava']; $fname = $_POST['fname']; $lname = $_POST['lname']; $mname = $_POST['mname']; $address = $_POST['address']; } if ($_SERVER['REQUEST_METHOD'] == 'POST') { $formValues = $_POST; $formErrors = array(); if (!VerifyForm($formValues, $formErrors)) DisplayForm($formValues, $formErrors); else ProcessForm($formValues); } else DisplayForm(null, null); ?> The output is: [link text]1 Problem the value that I put is can be seen by users.

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  • How to Hashtag (Without Being #Annoying)

    - by Mike Stiles
    The right tool in the wrong hands can be a dangerous thing. Giving a chimpanzee a chain saw would not be a pretty picture. And putting Twitter hashtags in the hands of social marketers who were never really sure how to use them can be equally unattractive. Boiled down, hashtags are for search and organization of tweets. A notch up from that, they can also be used as part of a marketing strategy. In terms of search, if you’re in the organic apple business, you want anyone who searches “organic” on Twitter to see your posts about your apples. It’s keyword tactics not unlike web site keyword search tactics. So get a clear idea of what keywords are relevant for your tweet. It’s reasonable to include #organic in your tweet. Is it fatal if you don’t hashtag the word? It depends on the person searching. If they search “organic,” your tweet’s going to come up even if you didn’t put the hashtag in front of it. If the searcher enters “#organic,” your tweet needs the hashtag. Err on the side of caution and hashtag it so it comes up no matter how the searcher enters it. You’ll also want to hashtag it for the second big reason people hashtag, organization. You can follow a hashtag. So can the rest of the Twitterverse. If you’re that into organic munchies, you can set up a stream populated only with tweets hashtagged #organic. If you’ve established a hashtag for your brand, like #nobugsprayapples, you (and everyone else) can watch what people are tweeting about your company. So what kind of hashtags should you include? They should be directly related to the core message of your tweet. Ancillary or very loosely-related hashtags = annoying. Hashtagging your brand makes sense. Hashtagging your core area of interest makes sense. Creating a specific event or campaign hashtag you want others to include and spread makes sense (the burden is on you to promote it and get it going). Hashtagging nearly every word in the tweet is highly annoying. Far and away, the majority of hashtagged words in such tweets have no relevance, are not terms that would be searched, and are not terms needed for categorization. It looks desperate and spammy. Two is fine. One is better. And it is possible to tweet with --gasp-- no hashtags! Make your hashtags as short as you can. In fact, if your brand’s name really is #nobugsprayapples, you’re burning up valuable, limited characters and risking the inability of others to retweet with added comments. Also try to narrow your topic hashtag down. You’ll find a lot of relevant users with #organic, but a lot of totally uninterested users with #food. Just as you can join online forums and gain credibility and a reputation by contributing regularly to that forum, you can follow hashtagged topics and gain the same kind of credibility in your area of expertise. Don’t just parachute in for the occasional marketing message. And if you’re constantly retweeting one particular person, stop it. It’s kissing up and it’s obvious. Which brings us to the king of hashtag annoyances, “hashjacking.” This is when you see what terms are hot and include them in your marketing tweet as a hashtag, even though it’s unrelated to your content. Justify it all you want, but #justinbieber has nothing to do with your organic apples. Equally annoying, piggybacking on a popular event’s hashtag to tweet something not connected to the event. You’re only fostering ill will and mistrust toward your account from the people you’ve tricked into seeing your tweet. Lastly, don’t @ mention people just to make sure they see your tweet. If the tweet’s not for them or about them, it’s spammy. What I haven’t covered is use of the hashtag for comedy’s sake. You’ll see this a lot and is a matter of personal taste. No one will search these hashtagged terms or need to categorize then, they’re just there for self-expression and laughs. Twitter is, after all, supposed to be fun.  What are some of your biggest Twitter pet peeves? #blogsovernow

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  • Can I legally publish my Fortran 90 wrappers to nVidias CUFFT library (from CUDA SDK)?

    - by Jakub Narebski
    From a legal standpoint (licensing issues), can I legally in agreement with license publish Fortran 90 wrappers (bindings) to CUFFT library from nVidia CUDA Toolkit, under some open source license (either CC0 i.e. public domain, or some kind of permissive license like BSD). nVidia provides only C bindings with their CUDA SDK. Header files contain the following text: /* * Copyright 1993-2011 NVIDIA Corporation. All rights reserved. * * NOTICE TO LICENSEE: * * This source code and/or documentation ("Licensed Deliverables") are * subject to NVIDIA intellectual property rights under U.S. and * international Copyright laws. * * These Licensed Deliverables contained herein is PROPRIETARY and * CONFIDENTIAL to NVIDIA and is being provided under the terms and * conditions of a form of NVIDIA software license agreement by and * between NVIDIA and Licensee ("License Agreement") or electronically * accepted by Licensee. Notwithstanding any terms or conditions to * the contrary in the License Agreement, reproduction or disclosure * of the Licensed Deliverables to any third party without the express * written consent of NVIDIA is prohibited. The License.txt file includes the following fragment Source Code: Developer shall have the right to modify and create derivative works with the Source Code. Developer shall own any derivative works ("Derivatives") it creates to the Source Code, provided that Developer uses the Materials in accordance with the terms and conditions of this Agreement. Developer may distribute the Derivatives, provided that all NVIDIA copyright notices and trademarks are propagated and used properly and the Derivatives include the following statement: "This software contains source code provided by NVIDIA Corporation."

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  • SQL SERVER – DATEDIFF – Accuracy of Various Dateparts

    - by pinaldave
    I recently received the following question through email and I found it very interesting so I want to share it with you. “Hi Pinal, In SQL statement below the time difference between two given dates is 3 sec, but when checked in terms of Min it says 1 Min (whereas the actual min is 0.05Min) SELECT DATEDIFF(MI,'2011-10-14 02:18:58' , '2011-10-14 02:19:01') AS MIN_DIFF Is this is a BUG in SQL Server ?” Answer is NO. It is not a bug; it is a feature that works like that. Let us understand that in a bit more detail. When you instruct SQL Server to find the time difference in minutes, it just looks at the minute section only and completely ignores hour, second, millisecond, etc. So in terms of difference in minutes, it is indeed 1. The following will also clear how DATEDIFF works: SELECT DATEDIFF(YEAR,'2011-12-31 23:59:59' , '2012-01-01 00:00:00') AS YEAR_DIFF The difference between the above dates is just 1 second, but in terms of year difference it shows 1. If you want to have accuracy in seconds, you need to use a different approach. In the first example, the accurate method is to find the number of seconds first and then divide it by 60 to convert it to minutes. SELECT DATEDIFF(second,'2011-10-14 02:18:58' , '2011-10-14 02:19:01')/60.0 AS MIN_DIFF Even though the concept is very simple it is always a good idea to refresh it. Please share your related experience with me through your comments. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, PostADay, SQL, SQL Authority, SQL DateTime, SQL Query, SQL Scripts, SQL Server, SQL Tips and Tricks, T SQL, Technology

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