temp-tables

After having created a temporary table and declaring the data types like so; CREATE TABLE #TempTable( ID int, Date datetime, Name char(20)) How do I then insert the relevant data which is already held on a physical table within the database? alexsuslin INSERT INTO #TempTable (ID, Date, Name) SELECT id, date, name FROM physical_table To insert all data from all columns, just use this: SELECT * INTO #TempTable FROM OriginalTable Don't forget to DROP the temporary table after you have finished with it and before you try creating it again: DROP TABLE #TempTable SELECT ID , Date , Name into #temp

I have a stored function where I use temporary tables. For performance reasons, I need an index in that table. Unfortunately, I cannot use ALTER TABLE because this causes an implicit commit. Therefore I'm looking for the syntax to add the INDEX for tempid during creation. Can anyone be of help? CREATE TEMPORARY TABLE tmpLivecheck ( tmpid INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY ) SELECT * FROM tblLivecheck_copy WHERE tblLivecheck_copy.devId = did; I wrestled quite a while with the proper syntax for CREATE TEMPORARY TABLE SELECT. Having figured out a few things, I wanted to share the answers

I have a stored procedure inside which I create a temporary table that typically contains between 1 and 10 rows. This table is truncated and filled many times during the stored procedure. It is truncated as this is faster than delete. Do I get any performance increase by replacing this temporary table with a table variable when I suffer a penalty for using delete (truncate does not work on table variables) Whilst table variables are mainly in memory and are generally faster than temp tables do I loose any benefit by having to delete rather than truncate? Running the followign to scripts, it

I have a stored procedure and part of them as below: @DRange is a incoming varchar value declare @sql varchar(max) set @sql = 'select * into #tmpA from TableA where create_date >= getDate - ' + @DRange + '' and is_enabled = 1' exec (@sql) select * from #tmpA The problem is when I execute the stored procedure, an error message occurs: Cannot find the object "#tmpA" because it does not exist or you do not have permissions. Is it not possible to use temp table and execute it or did I do something wrong? #tmpA is created in a different scope, so is not visible outside of the dynamic SQL. You can

How would I do the following TSQL query in DB2? I'm having problems creating a temp table based on the results from a query. SELECT COLUMN_1, COLUMN_2, COLUMN_3 INTO #TEMP_A FROM TABLE_A WHERE COLUMN_1 = 1 AND COLUMN_2 = 2 The error message is: "Error: SQL0104N An unexpected token "#TEMP_A" was found following "". Expected tokens may include: ":". SQLSTATE=42601" You have to declare a temp table in DB2 before you can use it: DECLARE GLOBAL TEMPORARY TABLE SESSION.YOUR_TEMP_TABLE_NAME AS ( SELECT COLUMN_1, COLUMN_2, COLUMN_3 FROM TABLE_A ) DEFINITION ONLY Then populate it: INSERT INTO SESSION

What is the difference between: CREATE TABLE #temp ( [ID] INT) INSERT INTO #temp SELECT ... and DECLARE @temp TABLE ( [ID] INT) INSERT @temp SELECT ... in SQL Server 2008? Temporary tables are like ordinary tables in most characteristics, except they go into TempDB instead of the current Database, and they dissapear after limited scope, (depending on whether they are session based or global Temp Tables. But all changes to data in Temp tables is logged to the transaction log, with all the performance implications that that entails. otoh, you can also add as many indices or views, or triggers,