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• Steps to take for figuring out the delay when calling service and loading data with the result?

  - by VoodooChild

  Hello, In a client server app, where client front end is done in silverlight using C# and the services are the WCF services. If I am to hit the service and do a query and bring back a result and I notice that it is taking a relatively long time to load my page which is just loading the grid with the data, what things should I look at fix this issue or how would I fix this issue? What steps could I take to determine the problem? where is the bottle-neck, can anyone know from the little information provided here? Does this have anything to do with serialization? Any insight on what could be causing this delay? My service calls are made async. I hope this question makes sense :) Thanks

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• Good ACL implementation in Java

  - by yonconf

  Hi All. I'm implementing a web based document management system and I'd like to implement ACLs in my system. My formal requirements are hierarchal permissions (documents inherit permissions from their folders) user groups (users can dynamically create groups and associate users with groups). Such groups can have permissions on objects in the system. My code will query permission on objects in two cases: 1. Manipulating a single document 2. Listing all documents where a manipulation is possible The latter requirement seems the achilles heel for Spring Security ACLs (their method seems likely to incur multiple DB hits for each document I manage) Anyone know of another ACL implementation? Thanks!

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• How to repair "order by" after union of 2 selects from 1 tables

  - by 4e4el

  I have a dropDownList on my form, where i need to have union of values from 2 colums of table [ost]. Type of this columns is currency. I have russian version of access, default value of curency in "rur" and i need "uah". I need to change format and save "order by". I use this query: (SELECT distinct FORMAT([Sum1] ,'# ##0.00" uah.";-# ##0.00" uah."') FROM ost) Union (SELECT distinct FORMAT([Sum2],'# ##0.00" uah.";-# ##0.00" uah."') FROM ost) ORDER BY 1

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• select field information with min time value

  - by Scarface

  Hey guys quick question, I thought I was doing the right thing but I keep getting the wrong result. I am trying to simply find the id of the entry with the min time, but I am not getting that entry. $qryuserscount1="SELECT id,min(entry_time) FROM scrusersonline WHERE topic_id='$topic_id'"; $userscount1=mysql_query($qryuserscount1); while ($row2 = mysql_fetch_assoc($userscount1)) { echo $onlineuser= $row2['id']; } That is my query, and it does not work. This however does work which does not make sense to me SELECT id FROM scrusersonline WHERE topic_id='$topic_id' ORDER by entry_time LIMIT 1, can anyone quickly point out what I am doing wrong?

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• Tag suggestion (not tag autocomplete)

  - by takeshin

  AJAX autocomplete is fairly simple to implement. However, I wonder how to handle smart tag suggestion like this on SO. To clarify the difference between autocomplete and suggestion: autocomplete: foo [foobar, foobaz] suggestion: foo [barfoo, foobar, foobaz], or even better, with 'did you mean' feature: [barfoo, foobar, foobaz, fobar, fobaz] I suppose I need some full text search in tags (all letters indexed, not just words). There would be no problem to do it witch regex or other patterns for limited number of tags (even client side). But how to implement this feature for big number of tags? Is there any particular reason (besides URL) the tags on SO are dash separated? What about Unicode characters in tags? I store the tags in the table with the following columns: id, tagname. My SQL query returns objects with following fields: id, tagname, count

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• MYSQL: COUNT with GROUP BY, LEFT JOIN and WHERE clause doesn't return zero values

  - by Paul Norman

  Hi guys, thanks in advance for any help on this topic! I'm sure this has a very simply answer, but I can't seem to find it (not sure what to search on!). A standard count / group by query may look like this: SELECT COUNT(`t2`.`name`) FROM `table_1` `t1` LEFT JOIN `table_2` `t2` ON `t1`.`key_id` = `t2`.`key_id` GROUP BY `t1`.`any_col` and this works as expected, returning 0 if no rows are found. So does: SELECT COUNT(`t2`.`name`) FROM `table_1` `t1` LEFT JOIN `table_2` `t2` ON `t1`.`key_id` = `t2`.`key_id` WHERE `t1`.`another_column` = 123 However: SELECT COUNT(`t2`.`name`) FROM `table_1` `t1` LEFT JOIN `table_2` `t2` ON `t1`.`key_id` = `t2`.`key_id` WHERE `t1`.`another_column` = 123 GROUP BY `t1`.`any_col` only works if there is at least one row in table_1 and fails miserably returning an empty result set if there are zero rows. I would really like this to return 0! Anyone enlighten me on this? Beer can be provided in exchange if you are in London ;-)

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• How to limit results by SUM

  - by superspace

  I have a table of events called event. For the purpose of this question it only has one field called date. The following query returns me a number of events that are happening on each date for the next 14 days: SELECT DATE_FORMAT( ev.date, '%Y-%m-%d' ) as short_date, count(*) as date_count FROM event ev WHERE ev.date >= NOW() GROUP BY short_date ORDER BY ev.start_date ASC LIMIT 14 The result could be as follows: +------------+------------+ | short_date | date_count | +------------+------------+ | 2010-03-14 | 1 | | 2010-03-15 | 2 | | 2010-03-16 | 9 | | 2010-03-17 | 8 | | 2010-03-18 | 11 | | 2010-03-19 | 14 | | 2010-03-20 | 13 | | 2010-03-21 | 7 | | 2010-03-22 | 2 | | 2010-03-23 | 3 | | 2010-03-24 | 3 | | 2010-03-25 | 6 | | 2010-03-26 | 23 | | 2010-03-27 | 14 | +------------+------------+ 14 rows in set (0.06 sec) Let's say I want to dislay these events by date. At the same time I only want to display a maximum of 10 at a time. How would I do this? Somehow I need to limit this result by the SUM of the date_count field but I do not know how. Anybody run into this problem before? Any help would be appreciated. Thanks

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• how to print not mapped value

  - by IcanMakeIt

  I am using complicated SQL queries, i have to use SqlQuery ... in simple way: MODEL: public class C { public int ID { get; set; } [NotMapped] public float Value { get; set; } } CONTROLLER: IEnumerable<C> results = db.C.SqlQuery(@"SELECT ID, ATAN(-45.01) as Value from C); return View(results.ToList()); VIEW: @model IEnumerable<C> @foreach (var item in Model) { @Html.DisplayFor(modelItem => item.Value) } and the result for item.Value is NULL. So my question is , how can i print the computed value from SQL Query ? Thank you for help.

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• Google App Engine & Django Sandbox: Shell and Web seem to be using different datastores?

  - by tones

  I'm new to both Django and Google App Engine, and am using a sandbox in OSX10.6 with the GoogleAppEngineLauncher. I've got a basic "bookstore" application running from the tutorial in the OReilly "Programming Google App Engine" book. Here's the bug: If I add a new object to the datastore through the web interface, then it's readable through the web interface, but does not appear to exist if I query the datastore through the shell. Vice versa: If I add an object in the shell, then I can read it from the shell, but it doesn't appear in the web interface. Any thoughts or theories would be welcome. Thanks! =T=

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• SQL UDF Group By Parameter Issue

  - by Ryan Strauss

  I'm having some issues with a group by clause in SQL. I have the following basic function: CREATE FUNCTION dbo.fn_GetWinsYear (@Year int) RETURNS int AS BEGIN declare @W int select @W = count(1) from tblGames where WinLossForfeit = 'W' and datepart(yyyy,Date) = @Year return @W END I'm trying to run the following basic query: select dbo.fn_GetWinsYear(datepart(yyyy,date)) from tblGames group by datepart(yyyy,date) However, I'm encountering the following error message: Column 'tblGames.Date' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause. Any ideas why this is occurring? FYI, I know I can remove the function and combine into one call but I'd like to keep the function in place if possible.

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• ajax how to read out $_post variable

  - by alex

  Hi, I am trying to filter/search a database with ajax $.ajax({ type: "POST", url: "filterSearch.php", queryString: qry, success: function(data){ alert( "Data Saved: " + data ); $('#searchResult').html(data); // Fill the search results box } }); Now in filterSearch.php i have the following test codes if(isset($_POST['queryString'])) { echo "TEST"; } if($_POST['runquery']==1) { $sql = "SELECT * FROM fs_vacatures WHERE here-the-like-query?"; $msg = $sql; echo $msg; die(); } die(); But nor TEST or the $sql is return in the alert??

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• Problem with sending "SetCookie" first in php code

  - by Camran

  According to this manual: http://us2.php.net/setcookie I have to set the cookie before anything else. Here is my cookie code: if (isset($_COOKIE['watched_ads'])){ $expir = time()+1728000; //20 days $ad_arr = unserialize($_COOKIE['watched_ads']); $arr_elem = count($ad_arr); if (in_array($ad_id, $ad_arr) == FALSE){ if ($arr_elem>10){ array_shift($ad_arr); } $ad_arr[]=$ad_id; setcookie('watched_ads', serialize($ad_arr), $expir, '/'); } } else { $expir = time()+1728000; //20 days $ad_arr[] = $ad_id; setcookie('watched_ads', serialize($ad_arr), $expir, '/'); } As you can see I am using variables in setting the cookie. The variables comes from a mysql_query and I have to do the query first. But then, if I do, I will get an error message: Cannot modify header information - headers already sent by ... The error points to the line where I set the cookie above. What should I do?a

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• Can an Oracle user get a list of its own running sessions without access to v$session?

  - by Nick Pierpoint

  I have an application that runs a process and I only want one process to run at a time. Some options are: Use an object lock to prevent subsequent processes running. This would be fine, but I want the calling session to return immediately and not wait for the running session to complete. Use a custom Y/N to set whether a process is running or not. I set a "Y" flag at the start of the process and set it to "N" when it finishes or fails. Also fine but feels like I'm re-inventing the wheel and doesn't feel like the way to go. It also falls short if the running session is killed as the flag stays at "Y". Use dbms_application_info.set_module This approach seems the most robust, but if I'm to know there's an existing running process I think I need to be able to query v$session and I don't want this application to have such wide access. Any ideas?

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• JQUERY AJAX, Issues with spaces being sent to the server, Why?

  - by nobosh

  I'm using the following code to post to the server which is then sent to a MYSQL query to find matches via search. $.ajax({ url: '/search/spotlight/', data: "q=" + $(this).val(), success: function(data) { } }); When Q's val has spaces in it, it's creating problems. I'm wondering if I'm handling this correctly? Do I need to encode the value in the AJAX call? Or is this a problem on my backend, which is ColdFusion Right now JQUERY is posting the following to the server: /search/spotlight/?q=FirstName%20LastName is this right?

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• SUM a pair of COUNTs from two tables based on a time variable

  - by Kevin O.

  Been searching for an answer to this for the better part of an hour without much luck. I have two regional tables laid out with the same column names and I can put out a result list for either table based on the following query (swap Table2 for Table1): SELECT Table1.YEAR, FORMAT(COUNT(Table1.id),0) AS Total FROM Table1 WHERE Table1.variable='Y' GROUP BY Table1.YEAR Ideally I'd like to get a result that gives me a total sum of the counts by year, so instead of: | REGION 1 | | REGION 2 | | YEAR | Total | | YEAR | Total | | 2010 | 5 | | 2010 | 1 | | 2009 | 2 | | 2009 | 3 | | | | | 2008 | 4 | I'd have: | MERGED | | YEAR | Total | | 2010 | 6 | | 2009 | 5 | | 2008 | 4 | I've tried a variety of JOINs and other ideas but I think I'm caught up on the SUM and COUNT issue. Any help would be appreciated, thanks!

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• How to store and retrieve pictures using PHP?

  - by user1276898

  I am building a webpage using PHP to search within my database. I am able to do a query and get the data to show on my page. I also have a picture that is related to each record. Let's say something like a picture ID for each employee. I am wondering what is the best way to store and retrieve pictures in order to get it show using PHP. Is there a way to store all the pictures in the subfolder like " image" and retrieve the pictures using PHP? I tried to search around on the internet, but I get confused. Also, when I type something in the search box and click the button, is there a way to keep the input in the search box without erasing it? Thank you very much.

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• ASP.Net Gridview, How to activate Edit Mode based on ID (DataKey)

  - by Jon P

  I have a page, lets call it SourceTypes.aspx, that has a a GridView that is displaying a list of Source Types. Part of the GridView is a DataKey, SourceTypeID. If source TypeID is passed to the page via a query sting, how to I put the Gridview into Edit mode for the appropriate row based on the SourceTypeID? The GridView is bound to a SQlDataSource object. I have a feeling I am going to kick myself when the answer appears!! I have looked at Putting a gridview row in edit mode programmatically but it is some what lacking in specifics

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• Rails: What's the suggested approach to retrieve xml from an outside source

  - by Syrahn

  Rails newbie (though long time programmer) here. I'm writing an test app that retrieves data from several outside sources (think Twitter, RSS feeds, etc.) and under certain circumstances, it stores that data in a db (or presents it to the user). The data model and the views are trivial. What I'm having difficulty with is making the actual xml HTTP call to the outside source and deserialize the xml response so I can query/use it in my controller/helper. What library/gem should I use to accomplish this? I tried looking this up around the net, but only came up with some article from 2006 which, knowing how fast Rails has developed, might well be completely deprecated. Your help is much appreciated.

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• SQL Outer joins

  - by dsquaredtech

  Three tables courses,registration,students columns in students firstname,lastname,studentid,major,admitdate,graddate,gender,dob columns in registration courseid,studentid columns in courses coursenumber,coursename,credits select statement I need to modify select lastname as 'Last Name',sum(credits) as 'Credits Registered For' from students as s inner join registration as r on s.studentid = r.studentid inner join courses as c on c.coursenumber = c.courseid group by last name; the question on the lab is... Modify the previous query to show all students, even if they have not registered for a class. You should have 14 rows. Students who are not registered will show NULL in output. I know this requires outer join of some sort but I'm not fully grasping these joins i've read multiple posts on here and other sites but can't seem figure it out.

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• Next Identity Key LINQ + SQL Server

  - by user569347

  To represent our course tree structure in our Linq Dataclasses we have 2 columns that could potentially be the same as the PK. My problem is that if I want to Insert a new record and populate 2 other columns with the PK that was generated there is no way I can get the next identity and stop conflict with other administrators who might be doing the same insert at the same time. Case: A Leaf node has right_id and left_id = itself (prereq_id) **dbo.pre_req:** prereq_id left_id right_id op_id course_id is_head is_coreq is_enforced parent_course_id and I basically want to do this: pre_req rec = new pre_req { left_id = prereq_id, right_id = prereq_id, op_id = 3, course_id = query.course_id, is_head = true, is_coreq = false, parent_course_id = curCourse.course_id }; db.courses.InsertOnSubmit(rec); try { db.SubmitChanges(); } Any way to solve my dilemma? Thanks!

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• Count number of results in a View

  - by Jukebox

  I need to count how many people belong in pre-defined groups (this is easy to do in SQL using the SELECT COUNT statement). My Views query runs fine and displays the actual data in my table, but I simply need to know how many results it found. However there doesn't seem to be a COUNT option in views. I am guessing I am going to have to use some sort of views hook, and then stick the result in the table. Here's a quick example of what i'm trying to achieve: My Table ---------------------- Group A | 20 people Group B | 63 people and so on. (I've tried using the Views_Calc module, but I get errors because it is not quite stable yet.) Anybody know of an easy way to count results in Views?

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• Find the period of over speed ?

  - by Vimvq1987

  Just something interesting come in my mind. Assume that we have a table (in SQL Server) like this: Location Velocity Time What is the best way to determine over speed periods (speed barrier is defined) ? My first idea was loading the table into an array, and then iterate over array to find these periods: (Pseudo C# code) bool isOverSpeed = false; for (int i =0;i<arr.Length;i++) { if (!isOverSpeed) if (arr[i].Velocity > speedBarrier) { #insert the first record into another array. isOverSpeed = true; } if(isOverSpeed) if (arr[i].Velocity < speedBarrier) { #insert the record into that array isOverSpeed = false; } } It works, but somewhat "not very effectively". Is there a "smarter" way, such as a T-SQL query or another algorithm to do this?

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• Is this a secure way to structure a mysql_query in PHP

  - by Supernovah

  I have tried and tried to achieve an SQL injection by making custom queries to the server outside of firefox. Inside the php, all variables are passed into the query in a string like this. Note, by this stage, $_POST has not been touched. mysql_query('INSERT INTO users (password, username) VALUES(' . sha1($_POST['password']) . ',' . $_POST['username'] . ')); Is that a secure way to make a change?

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• string update in sqlserver

  - by Thiyaneshwaran S

  Currently i have varchar field. The delimiter is "$P$P$". The delimiter will appear atleast once and atmost twice in the varchar data. Eg. Sample Heading$P$P$Sample description$P$P$Sample conclusion Sample Heading$P$P$Sample Description If the delimiter appears twice, i need to insert a text before the second occurance of the delimiter. Eg: Sample Heading$P$P$Sample DescriptionINSERT TEXT HERE$P$P$Sample Conclusion If the delimiter occurs only once, then i need to insert a text at the end of the field. Eg: Sample Heading$P$P$Sample DescriptionAPPEND TEXT HERE How this can be done in sql query?

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• mysql_query( "CALL... multiple results

  - by bradenkeith

  I am tapping into a service that provides zip codes tax information - there service is a bit shakey, so I want to copy their database over and run the results off my own server while using their service to just update my table. However I'm not sure I'm able to loop through multiple results with this query: mysql_query( "CALL zip2tax.z2t_lookup('" . $strZipCode . "','" . $strUserName . "', '" . $strUserPassword . "')" ) I've tried setting $strZipCode to *. However I get an error from the database. I read on MySQL that mysql_next_result should be the solution, however I'm unsure how to properly implement that.

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