A temporary table, as its named implied, is a short-lived table that exists for the duration of a database session. 847514 May 13, 2011 5:20 PM ( in response to 858716 ) Could you execute the following in the same order I mention in sql*plus and do a copy & paste from your session please. However, the query to create the global temp table is still slow and sometimes I need to reference that data when the temp table hasn't been created yet. Thanks for taking the time to respond to an old thread, Kendra. It means that Oracle truncates the table (remove all rows) after each commit. Pics of : Sql Check If Global Temp Table Exists. create index idxt1 on #tmp(a) againg I got error, because it exists. Being involved with EE helped me to grow personally and professionally. (All in same thread). This table not exists in temp db for the first time. All user and system-created temporary tables are reported when querying this table, with the exception of optimized internal temporary tables. END It doesn't exist and that is correct since it's a local temp table not a global temp table Well let's test that statement--create a global temp table CREATE TABLE ##temp(id INT) --Notice the 2 pound signs, that's how you create a global variable--Check if it exists READ MORE. MySQL does not provide a function or statement to directly check if a temporary table exists. Hi tech124, Query below is for your reference : IF EXISTS (SELECT * FROM TempDB.INFORMATION_SCHEMA.COLUMNS WHERE COLUMN_NAME = 'columnName' AND TABLE_NAME LIKE '#mytemptable%') PRINT 'Column exists' ELSE PRINT 'Column doesn''t exists' A temporary table in SQL Server, as the name suggests, is a database table that exists on the database server temporarily. I think Sjoerd was refering to Ram2098's answer rathe than mine. Ultimately I need to conditionally drop a temp table or truncate/delete data if it exists. The ON COMMIT clause specifies whether data in the table is transaction-specific or session-specific: The ON COMMIT DELETE ROWS clause specifies that the global temporary table is transaction-specific. So is there a better way to determine if a temporary table exists? ... All it does is to check … This must be set to "True". If I say. We've partnered with two important charities to provide clean water and computer science education to those who need it most. TEMPORARY or TEMP. Re: table doesnt exist for global temporary table. Please Sign up or sign in to vote. DROP TABLE IF EXISTS statement checks the existence of the table, and if the table exists, it drops. 0.00/5 (No votes) See more: VB. https://www.experts-exchange.com/questions/21086615/How-can-you-check-if-a-Global-Temporary-table-exists.html. PRINT '#temp exists!' Once we have set both properties to "True", execute the package again. Yes, if you need to reference sysobjects, it is better to reference information_schema tables. Here's an easy way to check if a temp table exists, before trying to create it (ie. Names the temporary table. I tried this after DECLARE GLOBAL TEMPORARY TABLE: SELECT * FROM QSYS2.SYSTABLES WHERE SYSTEM_TABLE_SCHEMA = 'QTEMP'; and it returned an empty result set. In SQL Server 2016, Microsoft introduced DIY or DROP IF EXISTS functionality. existence of index for temp table. for reusable scripts) from Simon Sabin's post :. How do I join to the temp table only if it exists, and join to a different table if it doesn't? However, if you're calling the same stored procedure that creates a temporary with the same name, to ensure that your CREATE TABLE statements are successful, use a simple pre-existence check with DROP:. Gain unlimited access to on-demand training courses with an Experts Exchange subscription. Not able to understand the reason for failure. ?what are the pros and cons?? Check SQL table exist or not in C#. 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