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  • TSQL Writing into a Temporary Table from Dynamic SQL

    - by Jeff
    Consider the following code: SET @SQL1 = 'SELECT * INTO #temp WHERE ...' exec(@SQL1) SELECT * from #temp (this line throws an error that #temp doesn't exist) Apparently this is because the exec command spins off a separate session and #temp is local to that session. I can use a global temporary table ##temp, but then I have to come up with a naming scheme to avoid collisions. What do you all recommend?

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  • Split query result by half in TSQL (obtain 2 resultsets/tables)

    - by rubdottocom
    I have a query that returns a large number of heavy rows. When I transform this rows in a list of CustomObject I have a big memory peak, and this transformation is made by a custom dotnet framework that I can't modify. I need to retrieve a less number of rows to do "the transform" in two passes and then avoid the momery peak. How can I split the result of a query by half? I need to do it in DB layer. I thing to do a "Top count(*)/2" but how to get the other half? Thank you!

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  • TSql Lookup function

    - by OldMan
    I have a bunch of dimension tables that have unique ID and Name fields. I need a T-SQL function that returns an ID when passed a table name and a value for the name field. I'm guessing the query would build a little query then execute it? Performance isn't an issue since this is a one time ETL thing.

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  • TSQL, Rename column of a returning table in user Function

    - by user1433660
    I have defined function which returns table with 2 columns. Can I rename these columns so that resulting table would be like: Press name | Sum of pages ? CREATE FUNCTION F_3 (@press nvarchar(255)) RETURNS @table TABLE ( Press nvarchar(255), PagesSum int ) AS BEGIN INSERT @table SELECT @press, SUM(Books.Pages) FROM Books, Press WHERE Press.Name = @press AND Books.Id_Press = Press.Id GROUP BY Press.Name RETURN END GO SELECT * FROM F_3('BHV') GO I've tried to do it like Press AS 'Press name' nvarchar(255) but that won't work.

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  • TSQL: Calculate the average of the rolling last 4 weeks

    - by user1917664
    I need your help. Database: SQL SERVER 2008R2 I want to calculte for a year and a week the average of value of the 4 last weeks. I have data a table like that: YEAR WEEKS VALUE 2012 1 3000 2012 2 5000 2012 3 6000 2012 4 7000 2012 5 8000 2012 6 9000 2012 7 1000 2012 8 6000 2012 9 9000 2012 10 4000 And I want that : YEAR WEEKS VALUE 2012 1 ( Average value for week 49, 50, 51, 52 for the year 2011) 2012 2 ( Average value for week 50, 51, 52 for the year 2011 and week 1 for the year 2012) 2012 3 ( Average value for week 51, 52 for the year 2011 and week 1, 2 for the year 2012) 2012 4 ( Average value for week 52 for the year 2011 and week 1, 2, 3 for the year 2012) 2012 5 5250 - ( Average value for week 1, 2, 3 , 4 for the year 2012) 2012 6 6500 - ( Average value for week 2, 3 , 4, 5 for the year 2012) Thank U for your help

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  • Date range advanced count calculation in TSQL

    - by cihata87
    I am working on call center project and I have to calculate the call arrivals at the same time between specific time ranges. I have to write a procedure which has parameters StartTime, EndTime and Interval For Example: Start Time: 11:00 End Time: 12:00 Interval: 20 minutes so program should divide the 1-hour time range into 3 parts and each part should count the arrivals which started and finished in this range OR arrivals which started and haven't finished yet Should be like this: 11:00 - 11:20 15 calls at the same time(TimePeaks) 11:20 - 11:40 21 calls ... 11:40 - 12:00 8 calls ... Any suggestions how to calculate them?

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  • TSQL - MSSQL 2008 add a column and update it in same stored procedure

    - by TortTupper
    if I have a stored procedure say create procure w AS ALTER TABLE t ADD x char(1) UPDATE t set x =1 Even when it lets me create that stored procedure (if I create it when x exists), when it runs, there is an error on the UPDATE statement because column x doesn't exist. What's the conventional way to deal with this, it must come up all the time? I can work around it by putting the UPDATE inside EXEC, is there another/better way? Thanks

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  • Make a set from CSV values in TSQL

    - by rossfabricant
    If I want to see which values from an Excel spreadsheet column don't match values in a table, I can easily create a table with Bulk Import. Is there a simpler way? EG, I want to do a query like: select into #temp from ('a', 'b', 'c') as 'Id' select * from #temp where Id not in (select Id from MyTable)

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  • Unit Testing TSQL

    - by Grant Fritchey
    I went through a period of time where I spent a lot of effort figuring out how to set up unit tests for TSQL. It wasn't easy. There are a few tools out there that help, but mostly it involves lots of programming. well, not as much as before. Thanks to the latest Down Tools Week at Red Gate a new utility has been built and released into the wild, SQL Test. Like a lot of the new tools coming out of Red Gate these days, this one is directly integrated into SSMS, which means you're working where you're comfortable and where you already have lots of tools at your disposal. After the install, when you launch SSMS and get connected, you're prompted to install the tSQLt example database. Go for it. It's a quick way to see how the tool works. I'd suggest using it. It' gives you a quick leg up. The concepts are pretty straight forward. There are a series of CLR commands that you use to configure a test and the test assertions. In between you're calling TSQL, either calls to your structure, queries, or stored procedures. They already have the one things that I always found wanting in database tests, a way to compare tables of results. I also like the ability to create a dummy copy of tables for the tests. It lets you control structures and behaviors so that the tests are more focused. One of the issues I always ran into with the other testing tools is that setting up the tests might require potentially destructive changes to the structure of the database (dropping FKs, etc.) which added lots of time and effort to setting up the tests, making testing more difficult, and therefor, less useful. Functionally, this is pretty similar to the Visual Studio tests and TSQLUnit tests that I used to use. The primary improvement over the Visual Studio tests is that I'm working in SSMS instead of Visual Studio. The primary improvement over TSQLUnit is the SQL Test interface it self. A lot of the functionality is the same, but having a sweet little tool to manage & run the tests from makes a huge difference. Oh, and don't worry. You can still run these tests directly from TSQL too, so automation has not gone away. I'm still thinking about how I'd use this in a dev environment where I also had source control to fret. That might be another blog post right there. I'm just getting started with SQL Test, so this is the first of several blog posts & videos. Watch this space. Try the tool.

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  • In SQL Server 2005, how can I use database_b, do something, then use the old db database_a in TSQL?

    - by Yousui
    Hi guys, In SQL Server 2005, how can I use database_b, do something, then use the old db database_a in TSQL? The following is my code but there is some problem with it. Who can help me to identity the problem? Great thanks. DECLARE @old_database_name VARCHAR(200) SET @old_database_name = db_name() use mydatabase create table t1(id int identity(1,1)) use @old_database_name

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  • Where did I hide my TSQL mojo?

    - by fatherjack
    LiveJournal Tags: How To,SQL Server,Tips and Tricks,TSQL,Reporting Services A little while ago I wrote a piece about finding database objects that rely on other objects that no longer exist - OK, I have my database ready, now what's missing? . This is linked to that sort of process. Many SQL Server installations are associated in some way with a Reporting Services installation, it's a very logical way to distribute your database contents to system users so they can work effectively. Databases,...(read more)

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  • Writing A Transact SQL (TSQL) Procedure For SQL Server 2008 To Delete Rows From Table Safely

    In this post, we will show and explain a small TSQL Sql Server 2008 procedure that deletes all rows in a table that are older than some specified date.  That is, say the table has 10,000,000 rows in it the accumulated over the past 2 years.  Say you want to delete all but [...]...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Undocumented Query Plans: Equality Comparisons

    - by Paul White
    The diagram below shows two data sets, with differences highlighted: To find changed rows using TSQL, we might write a query like this: The logic is clear: join rows from the two sets together on the primary key column, and return rows where a change has occurred in one or more data columns.  Unfortunately, this query only finds one of the expected four rows: The problem, of course, is that our query does not correctly handle NULLs.  The ‘not equal to’ operators <> and != do not evaluate...(read more)

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  • Avoid SQL Injection with Parameters

    - by simonsabin
    The best way to avoid SQL Injection is with parameters. With parameters you can’t get SQL Injection. You only get SQL Injection where you are building a SQL statement by concatenating your parameter values in with your SQL statement. Annoyingly many TSQL statements don’t take parameters, CREATE DATABASE for instance, or really annoyingly ALTER USER. In these situations you have to rely on using QUOTENAME or REPLACE to avoid SQL Injection. (Kimberly Tripp takes about this in her recent blog post Little...(read more)

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  • What is the most effective and flexible way to generate combinations in TSQL?

    - by SDReyes
    What is the most effective and flexible way to generate combinations in TSQL? With 'Flexible', I mean you should be able to add easily combination rules. e.g.: to generate combinatories of 'n' elements, sorting, remove duplicates, get combinatories where each prize belongs to a different lottery, etc. For example, Having a set of numbers representing lottery prizes. Number | Position | Lottery --------------------------- 12 | 01 | 67 12 | 02 | 67 34 | 03 | 67 43 | 01 | 89 72 | 02 | 89 33 | 03 | 89 (I include the position column because, a number could be repeated among different lottery's prizes) I would like to generate combinatories like: Numbers | Lotteries ------------------- 12 12 | 67 67 12 34 | 67 67 12 34 | 67 67 12 43 | 67 89 12 72 | 67 89 12 33 | 67 89 . . .

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