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  • Date ranges intersections..

    - by Puzzled
    MS Sql 2008: I have 3 tables: meters, transformers (Ti) and voltage transformers (Tu) ParentId MeterId BegDate EndDate 10 100 '20050101' '20060101' ParentId TiId BegDate EndDate 10 210 '20050201' '20050501' 10 220 '20050801' '20051001' ParentId TuId BegDate EndDate 10 300 '20050801' '20050901' where date format is yyyyMMdd (year-month-day) Is there any way to get periods intersection and return the table like this? ParentId BegDate EndDate MeterId TiId TuId 10 '20050101' '20050201' 100 null null 10 '20050201' '20050501' 100 210 null 10 '20050501' '20050801' 100 null null 10 '20050801' '20050901' 100 220 300 10 '20050901' '20051001' 100 220 null 10 '20051001' '20060101' 100 null null Here is the table creation script: --meters declare @meters table (ParentId int, MeterId int, BegDate smalldatetime, EndDate smalldatetime ) insert @meters select 10, 100, '20050101', '20060101' --transformers declare @ti table (ParentId int, TiId int, BegDate smalldatetime, EndDate smalldatetime ) insert @ti select 10, 210, '20050201', '20050501' union all select 10, 220, '20050801', '20051001' --voltage transformers declare @tu table (ParentId int, TuId int, BegDate smalldatetime, EndDate smalldatetime ) insert @tu select 10, 300, '20050801', '20050901'

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  • Implementing Skip List in C++

    - by trikker
    [SOLVED] So I decided to try and create a sorted doubly linked skip list... I'm pretty sure I have a good grasp of how it works. When you insert x the program searches the base list for the appropriate place to put x (since it is sorted), (conceptually) flips a coin, and if the "coin" lands on a then that element is added to the list above it(or a new list is created with element in it), linked to the element below it, and the coin is flipped again, etc. If the "coin" lands on b at anytime then the insertion is over. You must also have a -infinite stored in every list as the starting point so that it isn't possible to insert a value that is less than the starting point (meaning that it could never be found.) To search for x, you start at the "top-left" (highest list lowest value) and "move right" to the next element. If the value is less than x than you continue to the next element, etc. until you have "gone too far" and the value is greater than x. In this case you go back to the last element and move down a level, continuing this chain until you either find x or x is never found. To delete x you simply search x and delete it every time it comes up in the lists. For now, I'm simply going to make a skip list that stores numbers. I don't think there is anything in the STL that can assist me, so I will need to create a class List that holds an integer value and has member functions, search, delete, and insert. The problem I'm having is dealing with links. I'm pretty sure I could create a class to handle the "horizontal" links with a pointer to the previous element and the element in front, but I'm not sure how to deal with the "vertical" links (point to corresponding element in other list?) If any of my logic is flawed please tell me, but my main questions are: How to deal with vertical links and whether my link idea is correct Now that I read my class List idea I'm thinking that a List should hold a vector of integers rather than a single integer. In fact I'm pretty positive, but would just like some validation. I'm assuming the coin flip would simply call int function where rand()%2 returns a value of 0 or 1 and if it's 0 then a the value "levels up" and if it's 0 then the insert is over. Is this incorrect? How to store a value similar to -infinite? Edit: I've started writing some code and am considering how to handle the List constructor....I'm guessing that on its construction, the "-infinite" value should be stored in the vectorname[0] element and I can just call insert on it after its creation to put the x in the appropriate place.

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  • How do I accurately handle a batch separator for SQL from C#

    - by Sam Saffron
    For Data Explorer I would like to add support for a Batch separator. So for example if users type in: select 'GO' go select 1 as go Go select 100 I would like to return the three result sets. Its clear that I need some sort of parser here, my hope is that this is a solved problem and I can just plug it in. (writing a full T-SQL parser is not something I would like to do) What component / demo code could achieve splitting this batch into its 3 parts?

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  • how to send on users profile page on selecting username( using json autosuggest script)

    - by I Like PHP
    i m using auto suggest using Ajax Json . now when a user select a user name , i want to send user on the link of that user name my json data is coming in this way { query:'hel', suggestions:["hello world","hell boy ","bac to hell"], data:["2","26","34"] } now what i want that user goes to http://userProfile.php?uid=26 on select username(suppose user select "hell boy") how to do this?? UPDATE: i describe what i m doing step by step i m using a searchbox using jquery ajax, when user write some text on input box , we show (suggest) value regarading their search STEP 1. when user write atleast(2 letter) <input type="text" name="q" id="query" />then a function(below) in invoked in which i send the value written on text box(eg. hell). <script type="text/javascript" language="javascript"> var options, a; jQuery(function(){ options = { serviceUrl:'rpc.php' }; var a = $('#query').autocomplete({ serviceUrl:'rpc.php', minChars:3, delimiter: /(,|;)\s*/, // regex or character maxHeight:400, width:300, zIndex: 9999, deferRequestBy: 0, //miliseconds }); }); </script> STEP 3: on rpc.php, i collect the data and show using JSON my final data come in below format { query:'hell', suggestions:["hello world","hell boy ","bac to hell"], data:["2","26","34"] } where suggestion list having username and data is userid( from user_tables). above data comes in a div (on frontend) where user name displayed in a list STEP 4: now if i select any username using uparrow, downarrow then that name is filled in input box, STEP 5: now what i want that when user select usename then page automatically goes to that user's profile section ( userprofile.php?uid=2)

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  • deleting and reusing a temp table in a stored precedure

    - by Sheagorath
    Hi I need to SELECT INTO a temp table multiple times with a loop but I just can't do it, because after the table created by SELECT INTO you can't simply drop the table at the end of the loop, because you can't delete a table and create it again in the same batch. so how can I delete a table in a stored procedure and create it again? is it possible to this without using a temp table? here is a snippet of where I am actualy using the temp table which is supposed to be a pivoting algorithm: WHILE @offset<@NumDays BEGIN SELECT bg.*, j.ID, j.time, j.Status INTO #TEMP1 FROM #TEMP2 AS bg left outer join PersonSchedule j on bg.PersonID = j.PersonID and bg.TimeSlotDateTime = j.TimeSlotDateTime and j.TimeSlotDateTime = @StartDate + @offset DROP TABLE #TEMP2; SELECT * INTO #TEMP2 FROM #TEMP1 DROP TABLE #TEMP1 SET @offset = @offset + 1 END

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  • how to convert sql union to linq

    - by lowlyintern
    I have the following Transact SQL query using a union. I need some pointers as to how this would look in LINQ i.e some examples wouldbe nice or if anyone can recommend a good tutorial on UNIONS in linq. select top 10 Barcode, sum(ItemDiscountUnion.AmountTaken) from (SELECT d.Barcode,SUM(AmountTaken) AmountTaken FROM [Aggregation].[dbo].[DiscountPromotion] d GROUP BY d.Barcode UNION ALL SELECT i.Barcode,SUM(AmountTaken) AmountTaken FROM [Aggregation].[dbo].ItemSaleTransaction i group by i.Barcode) ItemDiscountUnion group by Barcode

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  • Flex/Air/AS3 Selecting and Populating a unFocused tab.

    - by Deyon
    I'm having a problem displaying data from a function to text box within a tab. If you run the code and click "Select Tab 2 and Fill..." I get an error; "TypeError: Error #1009: Cannot access a property or method of a null object reference." I'm guessing this is because "Tab 2" is/was not rendered yet. Now if I run the code, select "Tab 2" then select "Tab 1" and click "Select Tab 2 and Fill..." it works the way I would like. Dose any one know a way around this problem. ----Full Flex 4/Flash Builder Code just copy paste---- <?xml version="1.0" encoding="utf-8"?> <s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/halo" creationComplete=" "> <fx:Script> <![CDATA[ public function showtab2():void { mytextbox.text="I made it!"; tn.selectedIndex=1; } ]]> </fx:Script> <fx:Declarations> <!-- Place non-visual elements (e.g., services, value objects) here --> </fx:Declarations> <mx:Panel title="TabNavigator Container Example" height="90%" width="90%" paddingTop="10" paddingLeft="10" paddingRight="10" paddingBottom="10"> <mx:Label width="100%" color="blue" text="Select the tabs to change the panel."/> <mx:TabNavigator id="tn" width="100%" height="100%"> <!-- Define each panel using a VBox container. --> <mx:VBox label="Panel 1"> <mx:Label text="TabNavigator container panel 1"/> <mx:Button label="Select Tab 2 and Fill with Text" click="showtab2()"/> </mx:VBox> <mx:VBox label="Panel 2"> <mx:Label text="TabNavigator container panel 2"/> <s:TextInput id="mytextbox" /> </mx:VBox> </mx:TabNavigator> <mx:HBox> </mx:HBox> </mx:Panel> </s:WindowedApplication>

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  • C# WPF MAF Add-In interaction between themselves

    - by Ronny
    Hi, I would like create a very simple Paint application using MAF on WPF. The Add Ins I would like to create are: Main Image Processor - Shown the current paint Tool Box - The user can select some types of drawings tools Layers - The user can select the layers to display, delete layers and select on which layer to work on the question is: How I can interact between the different Add-Ins without using the host? Thanks, Ronny

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  • Wordpress Database SQL query help needed

    - by i-CONICA
    Hi, I've written a PHP script to access the latest item from the wordpress database, which it does. But I need to use it twice, once for the latest item from a specific category, and another from a differerent category... But right now I cannot figure out how to put the query together. The post has a post_parent, which in another table, called wp_term_relationships, is referred to as object_id, and has a term_taxonomy_id, which then relates to a different table, called wp_terms where the term_taxonomy_id is now term_id and then you have the category slug name available to select... I really cannot understand how this query would work though. I've made a really crap mock up of it, to try to "visually" explain what i'm trying to do... SELECT * FROM wp_posts WHERE post_status = 'publish' AND (SELECT term_taxonomy_id FROM wp_term_relationships WHERE object_id = post_parent) AND (SELECT slug FROM wp_terms WHERE term_id = term_taxonomy_id) ORDER BY ID DESC LIMIT 1 Really would appreciate some help... Thanks.

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  • LInq to sql query

    - by Mohit
    Hi, I have a sql query as follows: Declare @DivisionNo INT SET @DivisionNo = 5117 SELECT distinct CASE WHEN ISNULL([DivisionNo],'') < @DivisionNo THEN @DivisionNo ELSE [DivisionNo] END as DivisionNo --,[RecordID] ,[AcctCat] ,[AcctCatDesc] ,[CostCode] ,[CostCodeDesc] FROM [dbo].[vw_eSchdl_AcctCat_CostCode] WHERE DivisionNo = @DivisionNo UNION SELECT distinct CASE WHEN ISNULL([DivisionNo],'') < @DivisionNo THEN @DivisionNo ELSE [DivisionNo] END as DivisionNo --,[RecordID] ,[AcctCat] ,[AcctCatDesc] ,[CostCode] ,[CostCodeDesc] FROM [dbo].[vw_eSchdl_AcctCat_CostCode] WHERE AcctCat not in ( SELECT [AcctCat] FROM [dbo].[vw_eSchdl_AcctCat_CostCode] WHERE DivisionNo = @DivisionNo) How can I duplicate it using linq to sql? Thanks

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  • Nested sql queries in rails when :has_and_belongst_to_many

    - by Godisemo
    Hello, In my application I the next task that has not already been done by a user. I have Three models, A Book that has many Tasks and then I have a User that has has and belongs to many tasks. The table tasks_users table contains all completed tasks so I need to write a complex query to find the next task to perform. I have came up with two solutions in pure SQL that works, but I cant translate them to rails, thats what I need help with SELECT * FROM `tasks` WHERE `tasks`.`book_id` = @book_id AND `tasks`.`id` NOT IN ( SELECT `tasks_users`.`task_id` FROM `tasks_users` WHERE `tasks_users`.`user_id` = @user_id) ORDER BY `task`.`date` ASC LIMIT 1; and equally without nested select SELECT * FROM tasks LEFT JOIN tasks_users ON tasks_users.tasks_id = task.id AND tasks_users.user_id = @user_id WHERE tasks_users.task_id IS NULL AND tasks.book_id = @book_id LIMIT 1; This is what I Have done in rails with the MetaWhere plugin book.tasks.joins(:users.outer).where(:users => {:id => nil}) but I cant figure out how to get the current user there too, Thanks for any help!

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  • Date Picker Selection Change

    - by user421678
    Hello Friends, I am new in WPF,now i have a date picker in one of my form,in page load a text "Select a Date" will be showing in that date picker field,if i select a date in that date picker field that date will be shown in that date picker field,after this when i am clicking the cancel button i want to clear all the controls,for that i have written a function also,but in that date picker i want that text "Select a Date" back.What can i do for that?

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  • How to Generate XML from Database

    - by Nisarg Mehta
    Hi , I am fetching data from two tables CARRIER_IFTA ,IFTA_NAME. My Select Query is like below.. SELECT t1.IFTA_LICENSE_NUMBER,t1.IFTA_BASE_STATE,t2.NAME_TYPE,t2.NAME from CARRIER_IFTA t1 inner join IFTA_NAME t2 on t1.IFTA_LICENSE_NUMBER=t2.IFTA_LICENSE_NUMBER My Data is coming in this way... IFTA_LICENSE_NUMBER IFTA_BASE_STATE NAME_TYPE NAME -------------------------------------------------------- 630908333 US LG XYZ 630908333 US MG PQR 730908344 US LG ABC Now using XSLT I want to generate XML like this <T0019> <IFTA_ACCOUNT> <IFTA_LICENSE_NUMBER>630908333</IFTA_LICENSE_NUMBER> <IFTA_BASE_STATE>US</IFTA_BASE_STATE> <IFTA_NAME> <NAME_TYPE>LG<NAME_TYPE> <NAME>XYZ</NAME> </IFTA_NAME> <IFTA_NAME> <NAME_TYPE>MG<NAME_TYPE> <NAME>PQR</NAME> <IFTA_NAME> </IFTA_ACCOUNT> <IFTA_ACCOUNT> <IFTA_LICENSE_NUMBER>730908344</IFTA_LICENSE_NUMBER> <IFTA_BASE_STATE>US</IFTA_BASE_STATE> <IFTA_NAME> <NAME_TYPE>LG<NAME_TYPE> <NAME>ABC</NAME> </IFTA_NAME> </IFTA_ACCOUNT> </T0019> i have used below xslt but it is not giveng me desire result ... <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="2.0"> <xsl:template match="/ROWSET"> <xsl:element name="T0019"> <xsl:apply-templates select="IFTAACCOUNT"/> </xsl:element> </xsl:template> <xsl:template match="IFTAACCOUNT"> <xsl:element name="IFTAACCOUNT"> <xsl:apply-templates select="IFTA_CARRIER_ID_NUMBER"/> </xsl:element> </xsl:template> <xsl:template match="IFTA_LICENSE_NUMBER"> <xsl:element name="IFTA_LICENSE_NUMBER"> <xsl:apply-templates /> </xsl:element> </xsl:template> <xsl:template match="IFTA_BASE_STATE"> <xsl:element name="IFTA_BASE_STATE"> <xsl:apply-templates /> </xsl:element> </xsl:template> <xsl:template match="IRP_NAME"> <IRP_NAME> <xsl:apply-templates select="NAME"/> <xsl:apply-templates select="NAME_TYPE"/> </IRP_NAME> </xsl:template> <xsl:template match="NAME"> <xsl:element name="NAME"> <xsl:value-of select="." /> </xsl:element> </xsl:template> <xsl:template match="NAME_TYPE"> <xsl:element name="NAME_TYPE"> <xsl:apply-templates /> </xsl:element> </xsl:template> </xsl:stylesheet> but it is not giving desire result ... Please help me ... Thanks in Advance...

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  • Creating a function in Postgresql that does not return composite values

    - by celenius
    I'm learning how to write functions in Postgresql. I've defined a function called _tmp_myfunction() which takes in an id and returns a table (I also define a table object type called _tmp_mytable) -- create object type to be returned CREATE TYPE _tmp_mytable AS ( id integer, cost double precision ); -- create function which returns query CREATE OR REPLACE FUNCTION _tmp_myfunction( id integer ) RETURNS SETOF _tmp_mytable AS $$ BEGIN RETURN QUERY SELECT id, cost FROM sales WHERE id = sales.id; END; $$ LANGUAGE plpgsql; This works fine when I use one id and call it using the following approach: SELECT * FROM _tmp_myfunction(402); What I would like to be able to do is to call it, but to use a column of values instead of just one value. However, if I use the following approach I end up with all values of the table in one column, separated by commas: -- call function using all values in a column SELECT _tmp_myfunction(t.id) FROM transactions as t; I understand that I can get the same result if I use SELECT _tmp_myfunction(402); instead of SELECT * FROM _tmp_myfunction(402); but I don't know how to construct my query in such a way that I can separate out the results.

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  • Oracle - correlated subquery problems

    - by FrustratedWithFormsDesigner
    I have this query: select acc_num from (select distinct ac_outer.acc_num, ac_outer.owner from ac_tab ac_outer where (ac_outer.owner = '1234567') and ac_outer.owner = (select sq.owner from (select a1.owner from ac_tab a1 where a1.acc_num = ac_outer.acc_num order by a1.a_date desc, a1.b_date desc, a1.c_date desc) sq where rownum = 1) order by dbms_random.value()) subq order by acc_num; The idea is to get all acc_nums (not a primary key) from ac_tab, that have an owner of 1234567. Since an acc_num in ac_tab could have changed owners over time, I am trying to use the inner correlated subqueries to ensure that an acc_num is returned ONLY if it's most recent owner is 12345678. Naturally, it doesn't work (or I wouldn't be posting here ;) ) Oracle gives me an error: ORA-000904 ac_outer.acc_num is an invalid identifier. I thought that ac_outer should be visible to the correlated subqueries, but for some reason it's not. Is there a way to fix the query, or do I have to resort to PL/SQL to solve this? (Oracle verison is 10g)

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  • How do I correctly use two Not Exists statements in a where clause using Access SQL VBA?

    - by Bryan
    I have 3 Tables: NotHeard,analyzed,analyzed2. In each of these tables I have two columns named UnitID and Address. What I'm trying to do right now is to select all of the records for the columns UnitID and Address from NotHeard that don't appear in either analyzed or analyzed2. The SQL statement I created was as follows: SELECT UnitID, Address INTO [NotHeardByEither] FROM [NotHeard] Where NOT EXISTS( Select analyzed.UnitID FROM analyzed WHERE [NotHeard].UnitID = analyzed.UnitID) or NOT EXISTS( Select analyzed2.UnitID FROM analyzed2 WHERE [NotHeard].UnitID = analyzed2.UnitID) Group BY UnitID, Address I thought this would work since I've used the single NOT EXISTS subquery line and it has worked just fine for me in the past. The above query however returns the same data that is in the NotHeard table whereas if I take out the or NOT EXISTS part it works correctly. Any ideas as to what I'm doing wrong or how to do what I'm wanting to do?

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  • Need help in SQL and Sequel involving inner join and where/filter

    - by mhd
    Need help transfer sql to sequel: SQL: SELECT table_t.curr_id FROM table_t INNER JOIN table_c ON table_c.curr_id = table_t.curr_id INNER JOIN table_b ON table_b.bic = table_t.bic WHERE table_c.alpha_id = 'XXX' AND table_b.name='Foo'; I'm stuck in the sequel, I don't know how to filter, so far like this: cid= table_t.select(:curr_id). join(:table_c, :curr_id=>:curr_id). join(:table_b, :bic=>:bic). filter( ????? ) Answer with better idiom than above is appreciated as well.Tnx. UPDATE: I have to modify a little to make it works cid = DB[:table_t].select(:table_t__curr_id). join(:table_c, :curr_id=>:curr_id). join(:table_b, :bic=>:table_t__bic). #add table_t or else ERROR: column table_c.bic does not exist filter(:table_c__alpha_id => 'XXX', :table_b__name => 'Foo') without filter, cid = DB[:table_t].select(:table_t__curr_id). join(:table_c, :curr_id=>:curr_id, :alpha_id=>'XXX'). join(:table_b, :bic=>:table_t__bic, :name=>'Foo') btw I use pgsql 9.0

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  • MySQL subqueries

    - by swamprunner7
    Can we do this query without subqueries? SELECT login, post_n, (SELECT SUM(vote) FROM votes WHERE votes.post_n=posts.post_n)AS votes, (SELECT COUNT(comments.post_n) FROM comments WHERE comments.post_n=posts.post_n)AS comments_count FROM users, posts WHERE posts.id=users.id AND (visibility=2 OR visibility=3) ORDER BY date DESC LIMIT 0, 15 tables: Users: id, login Posts: post_n, id, visibility Votes: post_n, vote id — it`s user id, Users the main table.

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  • how to create a mootools 1.1 function with array

    - by liz
    i have a series of select lists, that i am using to populate text boxes with ids. so you click a select option and another text box is filled with its id. with just one select/id pair this works fine, but i have multiples, and the only thing that changes is the id of the select and input.. in fact just the ending changes, the inputs all start with featredproductid and the select ids all start with recipesproduct and then both end with the category. i know that listing this over and over for each category is not the way to do it. i think i need to make an array of the categories var cats = ['olive oil', "grains", "pasta"] and then use a forEach function? maybe? here is the clunky code window.addEvent('domready', function() { $('recipesproductoliveoil').addEvent('change', function(e){ pidselected = this.options[this.selectedIndex].getProperty('value') ; $("featuredproductidoliveoil").setProperties({ value: pidselected}); ; }); $('recipesproductgrains').addEvent('change', function(e){ pidselected = this.options[this.selectedIndex].getProperty('value') ; $("featuredproductidgrains").setProperties({ value: pidselected}); ; }); $('recipesproductpasta').addEvent('change', function(e){ pidselected = this.options[this.selectedIndex].getProperty('value') ; $("featuredproductidpasta").setProperties({ value: pidselected}); ; }); $('recipesproductpantry').addEvent('change', function(e){ pidselected = this.options[this.selectedIndex].getProperty('value') ; $("featuredproductidpantry").setProperties({ value: pidselected}); ; }); }); keep in mind this is mootools 1.1 (no i cant update it sorry). i am sure this is kind of basic, something i seem to have wrapping my brain around. but i am quite sure doing it as above is not really good...

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  • Getting the ranking of a photo in SQL

    - by Jake Petroules
    I have the following tables: Photos [ PhotoID, CategoryID, ... ] PK [ PhotoID ] Categories [ CategoryID, ... ] PK [ CategoryID ] Votes [ PhotoID, UserID, ... ] PK [ PhotoID, UserID ] A photo belongs to one category. A category may contain many photos. A user may vote once on any photo. A photo can be voted for by many users. I want to select the ranks of a photo (by counting how many votes it has) both overall and within the scope of the category that photo belongs to. The count of SELECT * FROM Votes WHERE PhotoID = @PhotoID being the number of votes a photo has. I want the resulting table to have generated columns for overall rank, and rank within category, so that I may order the results by either. So for example, the resulting table from the query should look like: PhotoID VoteCount RankOverall RankInCategory 1 48 1 7 3 45 2 5 19 33 3 1 2 17 4 3 7 9 5 5 ... ...you get the idea. How can I achieve this? So far I've got the following query to retrieve the vote counts, but I need to generate the ranks as well: SELECT PhotoID, UserID, CategoryID, DateUploaded, (SELECT COUNT(CommentID) AS Expr1 FROM dbo.Comments WHERE (PhotoID = dbo.Photos.PhotoID)) AS CommentCount, (SELECT COUNT(PhotoID) AS Expr1 FROM dbo.PhotoVotes WHERE (PhotoID = dbo.Photos.PhotoID)) AS VoteCount, Comments FROM dbo.Photos

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  • Do database engines other than SQL Server behave this way?

    - by Yishai
    I have a stored procedure that goes something like this (pseudo code) storedprocedure param1, param2, param3, param4 begin if (param4 = 'Y') begin select * from SOME_VIEW order by somecolumn end else if (param1 is null) begin select * from SOME_VIEW where (param2 is null or param2 = SOME_VIEW.Somecolumn2) and (param3 is null or param3 = SOME_VIEW.SomeColumn3) order by somecolumn end else select somethingcompletelydifferent end All ran well for a long time. Suddenly, the query started running forever if param4 was 'Y'. Changing the code to this: storedprocedure param1, param2, param3, param4 begin if (param4 = 'Y') begin set param2 = null set param3 = null end if (param1 is null) begin select * from SOME_VIEW where (param2 is null or param2 = SOME_VIEW.Somecolumn2) and (param3 is null or param3 = SOME_VIEW.SomeColumn3) order by somecolumn end else select somethingcompletelydifferent And it runs again within expected parameters (15 seconds or so for 40,000+ records). This is with SQL Server 2005. The gist of my question is this particular "feature" specific to SQL Server, or is this a common feature among RDBMS' in general that: Queries that ran fine for two years just stop working as the data grows. The "new" execution plan destroys the ability of the database server to execute the query even though a logically equivalent alternative runs just fine? This may seem like a rant against SQL Server, and I suppose to some degree it is, but I really do want to know if others experience this kind of reality with Oracle, DB2 or any other RDBMS. Although I have some experience with others, I have only seen this kind of volume and complexity on SQL Server, so I'm curious if others with large complex databases have similar experience in other products.

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  • XSLT: use parameters in xls:sort attributes (dynamic sorting)

    - by fireeyedboy
    How do I apply a parameter to a select and order attribute in a xsl:sort element? I'ld like to do this dynamic with PHP with something like this: $xsl = new XSLTProcessor(); $xslDoc = new DOMDocument(); $xslDoc->load( $this->_xslFilePath ); $xsl->importStyleSheet( $xslDoc ); $xsl->setParameter( '', 'sortBy', 'viewCount' ); $xsl->setParameter( '', 'order', 'descending' ); But I'ld first have to now how to get this to work. I tried the following, but it gives me a 'compilation error' : 'invalid value $order for order'. $sortBy doesn't seem to do anything either: <?xml version="1.0" encoding="utf-8"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:output method="xml" indent="yes"/> <xsl:param name="sortBy" select="viewCount"/> <xsl:param name="order" select="descending"/> <xsl:template match="/"> <media> <xsl:for-each select="media/medium"> <xsl:sort select="$sortBy" order="$order"/> // <someoutput> </xsl:for-each> </media> </xsl:template> </xsl:stylesheet>

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  • Does the order of columns in a query matter?

    - by James Simpson
    When selecting columns from a MySQL table, is performance affected by the order that you select the columns as compared to their order in the table (not considering indexes that may cover the columns)? For example, you have a table with rows uid, name, bday, and you have the following query. SELECT uid, name, bday FROM table Does MySQL see the following query any differently and thus cause any sort of performance hit? SELECT uid, bday, name FROM table

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