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• mysql joining three specific tables

  - by sam lim

  Here what i would like to pull date from this three table. Table users i have three columns uid, username , data(text) Table users_order i have three columns uid, orders_id , users_email Table order_products i have three columns orders_id, product_id, product_name I would like to use product_id as the ref/search to pull the user info from those three tables. If product_id = 5 The query will display uid; username; users_email; orders_id; product_name; data (text) how would i right the sql query for this situation. Thanks,

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• jquery update div as text input is modified

  - by Piero

  Hi, So I have this text input in a form, and I want to update a div as the user types text in the text input. <p><label for="movie_name">Film: </label> <input type="text" name="movie_name" class="required" onkeydown="changediv2(this.value)" /></p> <p><div id="ajax_update"></div></p> My js method: function changediv2(str) { $('#ajax_update').html(geturl('http://url/search/movie?query='+str)); } If I type in a browser http://url/search/movie?query=someString, I get some html displayed. But when I call it via this ajax call, nothing happens... My geturl method: function geturl(addr) { var r = $.ajax({ type: 'GET', url: addr, async: false }).responseText; return r; } I cannot see what is wrong in there... Please help me! :)

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• Stored proc in .net dataset class vs studio management

  - by Robert

  Morning all. Got myself a simple query which returns ten rows in SQL Server Management Studio. I call the stored proc by right clicking it and feeding in the parameters. The results are returned immediately. In .NET we have set up a dataset class, added a table adapter whose select is this same procedure. I pass in the very same parameters and the execution times out after the standard 30 seconds. It continues to run immediately when called in sql server management studio. Any ideas why the execution time is seemingly infinite in the .net dataset class. The query is very simple.

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• PreparedStatement and 'null' value in WHERE clause

  - by bond

  I am using PrepareStatement and BatchUpdate for executimg a UPDATE query. In for loop I create a Batch. At end of loop I execute batch. Above logic works fine if SQL query used in PrepareStatement does not have null values in WHERE claues. Update Statement fails if there is null value in WHERE clasue. My code looks something like this, connection = getConnection(); PreparedStatement ps = connection.prepareStatement("UPDATE TEST_TABLE SET Col1 = true WHERE Col2 = ? AND Col3 = ?") for (Data aa : InComingData) { if(null == aa.getCol2()) { ps.setNull(1, java.sql.Types.INTEGER); } else { ps.setInteger(1,aa.getCol2()) } if(null == aa.getCol3()) { ps.setNull(2, java.sql.Types.INTEGER); } else { ps.setInteger(2,aa.getCol3()) } ps.addBatch(); } ps.executeBatch(); connection.commit(); Any help would be appreciated.

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• Multiple conditions with CASE statements

  - by Pavan Reddy

  I need to query some data. here is the query that i have constructed but which isn't workig fine for me. For this example I am using AdventureWorks database. SELECT * FROM [Purchasing].[Vendor] WHERE PurchasingWebServiceURL LIKE case // In this case I need all rows to be returned if @url is '' or 'ALL' or NULL when (@url IS null OR @url = '' OR @url = 'ALL') then ('''%'' AND PurchasingWebServiceURL IS NULL') //I need all records which are blank here including nulls when (@url = 'blank') then (''''' AND PurchasingWebServiceURL IS NULL' ) //n this condition I need all record which are not like a particular value when (@url = 'fail') then ('''%'' AND PurchasingWebServiceURL NOT LIKE ''%treyresearch%''' ) //Else Match the records which are `LIKE` the input value else '%' + @url + '%' end This is not working for me. How can I have multiple where condition clauses in the THEN of the the same CASE? How can I make this work?

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• MySQL SELECT WHERE returning empty with long numbers, although they are there

  - by brybam

  Alright, so basically the most simple query ever... I've done this a million times... SELECT * FROM purchased_items WHERE uid = '$uid' if $uid == 123 It works fine and returns all data in rows where uid is 123 if $uid == 351565051447743 It returns empty... I'm positive 351565051447743 is a possible uid in some rows, i literally copied and pasted it into the table. $uid is a string, and is being passed as a string. This is something i've done a million times, and i've never had this simple query not work. Any ideas why this is not working?

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• MySQL - Conflicting WHERE and GROUP BY Statements

  - by TaylorPLM

  I have a query returning the counts of some data, but I do NOT want data that has a null value in it... As an example, the code rolls stats from a clicking system into a table. SELECT sh.dropid, ... FROM subscriberhistory sh INNER JOIN subscriberhistory sh2 on sh.subid = sh2.subid WHERE sh.dropid IS NOT NULL AND sh.dropid != "" ... GROUP BY sh.dropid An example of the record set returned would look like this... 400 2 3 4 5 6 401 2 3 6 5 4 NULL 2 3 4 5 1 There are some other where clauses, and a few more selects (as I said, using the count aggregate) that are also within the query. There is also an order by statement. Again, the goal is to keep the NULL data out of the preceding record set. Could someone explain to me why this behavior is occurring and what to do to solve it.

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• PDO Prepare statement not processing parameters

  - by Danten

  I've exhausted all efforts at what appears to be a trivial problem, but gotten nowhere. There is a simple Prepare statement: $qry = $core->db->prepare("SELECT * FROM users WHERE email = '?'"); $qry->execute(array('[email protected]')); However, no rows are returned. Running the query with the parameters hardcoded into the query results in a successful selection of one row. I've tryed many different methods of doing the prepare, but even it this most simple form it isn't working. The PDO object is stored in a singleton called Core. PDO is using the mysql driver.

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• PreparedStatement throws MySQLSyntaxErrorException

  - by sqlBugs

  I have the following Java code: String query = "Select 1 from myTable where name = ? and age = ?"; PreparedStatement stmt = conn.prepareStatement(query); stmt.setString(1, name); stmt.setInt(2, age); ResultSet rs = stmt.executeQuery(); Whenever I run the above code, it throws an exception on line 2 (where the PreparedStatement is declared): Error 0221202: SQLException = com.mysql.jdbc.exceptions.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '? AND age = ?' at line 1 Does anyone have any suggestions about what I am doing wrong? Thanks!

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• Connection Timeout Linked Server

  - by Wade73

  I have created a linked server from one SQL Server 2005 to Another 2005. When I run an update query through the SQL Server Management Studio (SSMS), it runs in under a second. If I run the query through a asp webpage it times out. I ran SQL Profiler to see if I noticed anything as well as the Activity Monitor in SSMS and all I found was that a lock was being created (Wait type LOCK_M_U), but I can't find what is locking it. Any help would be appreciated. Wade

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• Performing LINQ Self Join

  - by senfo

  I'm not getting the results I want for a query I'm writing in LINQ using the following: var config = (from ic in repository.Fetch() join oc in repository.Fetch() on ic.Slot equals oc.Slot where ic.Description == "Input" && oc.Description == "Output" select new Config { InputOid = ic.Oid, OutputOid = oc.Oid }).Distinct(); The following SQL returns 53 rows (which is correct), but the above LINQ returns 96 rows: SELECT DISTINCT ic.Oid AS InputOid, oc.Oid AS OutputOid FROM dbo.Config AS ic INNER JOIN dbo.Config AS oc ON ic.Slot = oc.Slot WHERE ic.Description = 'Input' AND oc.Description = 'Output' How would I replicate the above SQL in a LINQ query? Update: I don't think it matters, but I'm working with LINQ to Entities 4.0.

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• WP7 Return the last 7 days of data from an xml web service

  - by cvandal

  Hello, I'm trying to return the last 7 days of data from an xml web service but with no luck. Could someone please explain me to how I would accomplish this? The XML is as follows: <node> <api> <usagelist> <usage day="2011-01-01"> <traffic name="total" unit="bytes">23579797</traffic> </usage> <usage day="2011-01-02"> <traffic name="total" unit="bytes">23579797</traffic> </usage> <usage day="2011-01-03"> <traffic name="total" unit="bytes">23579797</traffic> </usage> <usage day="2011-01-04"> <traffic name="total" unit="bytes">23579797</traffic> </usage> </usagelist> </api> </node> EDIT The data I want to retrieve will be used to populate a line graph. Specificly I require the day attribute value and the traffic element value for the past 7 days. At the moment, I have the code below in place, howevewr it's only showing the first day 7 times and traffic for the first day 7 times. XDocument xDocument = XDocument.Parse(e.Result); var values = from query in xDocument.Descendants("usagelist") select new History { day = query.Element("usage").Attribute("day").Value, traffic = query.Element("usage").Element("traffic").Value }; foreach (History history in values) { ObservableCollection<LineGraphItem> Data = new ObservableCollection<LineGraphItem>() { new LineGraphItem() { yyyymmdd = history.day, value = double.Parse(history.traffic) }, new LineGraphItem() { yyyymmdd = history.day, value = double.Parse(history.traffic) }, new LineGraphItem() { yyyymmdd = history.day, value = double.Parse(history.traffic) }, new LineGraphItem() { yyyymmdd = history.day, value = double.Parse(history.traffic) }, new LineGraphItem() { yyyymmdd = history.day, value = double.Parse(history.traffic) }, new LineGraphItem() { yyyymmdd = history.day, value = double.Parse(history.traffic) }, new LineGraphItem() { yyyymmdd = history.day, value = double.Parse(history.traffic) }, }; lineGraph1.DataSource = Data; }

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• Understanding the concept of Inodes

  - by darkie15

  Hi All, I am referring to the link: http://www.tux4u.nl/freedocs/unix/draw/inode.pdf I am confused on parts: 1 12 direct block pointers 2 1 single indirect block pointer 3 1 double indirect block pointer 4 1 triple indirect block pointer Now the diagram says that each pointer is 32/64 bits. [Query]: Why and how are these values inferred? I mean why specifically have only 32 or 64 bit pointers? The diagram says, One data block{8 KB} for each pointer {4 bytes/8 bytes} [Query]: How does this actually work out? i.e. 8*1024 bytes / 8 bytes = 1024 bytes? What is the logic behind having a 8 bytes pointer for 8KB block? Regards, darkie.

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• Caching result of SELECT statement for reuse in multiple queries

  - by Andrew

  I have a reasonably complex query to extract the Id field of the results I am interested in based on parameters entered by the user. After extracting the relevant Ids I am using the resulting set of Ids several times, in separate queries, to extract the actual output record sets I want (by joining to other tables, using aggregate functions, etc). I would like to avoid running the initial query separately for every set of results I want to return. I imagine my situation is a common pattern so I am interested in what the best approach is. The database is in MS SQL Server and I am using .NET 3.5.

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• Selecting elements that do not contain a certain ID using ExtJS

  - by pmdarrow

  I'm trying to select all the <input> elements of a form except ones with IDs containing the words foo or bar. How can I do this using ExtJS 2.3.0? I've tried the following: Ext.query("select,input:not([id*=foo][id*=bar])", "SomeForm");` ... but it doesn't work. Excluding IDs with foo in them seems to work fine: Ext.query("select,input:not([id*=foo])", "SomeForm")` I'm just not sure how to add a second ID substring. Any Ideas?

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• HQL: illegal attempt to dereference collection

  - by skip

  The situation is like this: I have an entity Book that holds a one-to-many relationship with Chapter. Now if I try the query, "from Book book inner join book.chapters chapter where chapter.title like '%hibernate%'", it gives me the desired result. But if I try, "from Book where book.chapters.title like '%hibernate%'", I get the error illegal attempt to dereference collection. The thing is that I only want the collection of Book objects in return and not a collection of pair of Book and Chapter objects in return which I get with the former query. Could someone help me understand?

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• Excluding a specific substring from a regex

  - by Matt S

  I'm attempting to mangle a SQL query via regex. My goal is essentially grab what is between FROM and ORDER BY, if ORDER BY exists. So, for example for the query: SELECT * FROM TableA WHERE ColumnA=42 ORDER BY ColumnB it should capture TableA WHERE ColumnA=42, and it should also capture if the ORDER BY expression isn't there. The closest I've been able to come is SELECT (.*) FROM (.*)(?=(ORDER BY)) which fails without the ORDER BY. Hopefully I'm missing something obvious. I've been hammering in Expresso for the past hour trying to get this.

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• HOw do I limit array to a certain number??

  - by mathew

  I do have an array which queries database..what I need to do is control this array to a certain number say 10. but I dont want to set LIMIT in mysql query I need to leave that as it is... $result = mysql_query("SELECT * FROM query ORDER BY regtime DESC"); while($row = mysql_fetch_array($result)) { echo "<img src='bullet.gif' align='absmiddle' class='col1ab'><a class='col1ab' href=".$row['web']." >www.".$row['web']."</a><br>"; } How do I limit this array to certain limit??

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• Prevent duplicate rows with all non-unique columns (only with MySQL)?

  - by letseatfood

  Ho do I prevent a duplicate row from being created in a table with two columns, neither of which are unique? And can this be done using MySQL only, or does it require checks with my PHP script? Here is the CREATE query for the table in question (two other tables exist, users and roles): CREATE TABLE users_roles ( user_id INT(100) NOT NULL, role_id INT(100) NOT NULL, FOREIGN KEY (user_id) REFERENCES users(user_id), FOREIGN KEY (role_id) REFERENCES roles(role_id) ) ENGINE = INNODB; I would like the following query, if executed more than once, to throw an error: INSERT INTO users_roles (user_id, role_id) VALUES (1, 2); Please do not recommend bitmasks as an answer. Thanks!

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• SQL validation!

  - by Filip

  I am pretty new in SQL so this may be a stupid question... I have a form in PHP which fills in few fields in my SQL table. I have this code: $sql="INSERT INTO $tbl_name (app_name, app_path, short_desc, full_desc) VALUES ('$_POST[app_name]', '$_POST[app_path]', '$_POST[short_desc]', '$_POST[full_desc]')"; But even app_name and app_path are NOT NULL columns, the query can be executed if there is no text in these fields in the form. So, my question is: How to stop the execution of the query if there is no text in the NOT NULL fields ?

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• How do you escape double quotes inside a SQL fulltext 'contains' function?

  - by Richard Davies

  How do you escape a double quote character inside a MS SQL 'contains' function? SELECT decision FROM table WHERE CONTAINS(decision, '34" AND wide') Normally contains() expects double quotes to surround an exact phrase to match, but I want to search for an actual double quote character. I've tried escaping it with \, `, and even another double quote, but none of that has worked. P.S. I realize a simple example like this could also be done using the LIKE statement, but I need to use the fulltext search function. The query I provided here has been simplified from my actual query for example purposes.

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• Way around ASP.NET session being shared across multiple tab windows

  - by ace

  I'm storing some value in an asp.net session on the first page. On the next page, this session value is being read. However if multiple tabs are opened and there are multiple page 1-page 2 navigation going on, the value stored in session gets mixed up since the session is shared between the browser tabs. I'm wondering what are the options around this : Query String: Passing value between the pages using query string, I don't want to take this approach since there can be multiple anchor tags on page 1 linking to page 2 and I can not rewrite the URLs of each tag since they are dynamic. Cookies??? In-memory cookies are shared across browser tabs too, same as the session cookie, rite ? Any other option?

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• How to make a particular information to be accessible at masterpage, page and usercontrol

  - by Ismail S

  I'm fetching some settings out of the database based on a value passed from a query string. Out of these settings, a few will be used in master page, few on my Page and few in my user control (say login control which is a web user control). I've an entity class MySetting for it and there is a method in my data access layer which returns me an instance of MySetting when I pass the value I got in query string. I don't want to fetch settings from the database multiple times for one request. I'm using asp.net web forms with C# and sql server.

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• Linq databinding issue....data doesnt show up in gridview ...I get the message that number and name field are not found in the data source

  - by Chandan Khatwani

  List<Emp> employees = new List<Emp>(); Emp e1 = new Emp(); e1.number = 2; e1.name = "Dinesh"; employees.Add(e1); Emp e2 = new Emp(); e2.number = 3; e2.name = "Vishal"; employees.Add(e2); var query = from n in employees orderby n.name descending select n; GridView1.DataSource = query; GridView1.DataBind();

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• Constructing a tree using Python

  - by stealthspy

  I am trying to implement a unranked boolean retrieval. For this, I need to construct a tree and perform a DFS to retrieve documents. I have the leaf nodes but I am having difficulty to construct the tree. Eg: query = OR ( AND (maria sharapova) tennis) Result: OR | | AND tennis | | maria sharapova I traverse the tree using DFS and calculate the boolean equivalent of certain document ids to identify the required document from the corpus. Can someone help me with the design of this using python? I have parsed the query and retrieved the leaf nodes for now.

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