How do I delete a variable in SQL Server?
You can just use DELETE FROM @tableVariable , as described in the accepted answer, to get functionality substantially equivalent to TRUNCATE TABLE (except for the logging – this could certainly be a problem if there were a lot of rows in the variable, or the SQL that created the variable was being run very often).
How do I clear a temp table in SQL?
Using the DROP TABLE command on a temporary table, as with any table, will delete the table and remove all data. In an SQL server, when you create a temporary table, you need to use the # in front of the name of the table when dropping it, as this indicates the temporary table.
Can we drop table variable in SQL Server?
Table variables are automatically local and automatically dropped — you don’t have to worry about it. +1 – Also you can’t drop them even if you wanted to – they persist as long as the session is open, just like any other variable. They are also unaffected by transactions.
How do I drop a global temporary table in SQL Server?
After creation, global temporary tables become visible to any user and any connection. They can be manually dropped with DROP TABLE command. Global temporary tables are automatically dropped when the session that create the table completes and there is no active references to that table.
Should I drop temp table in stored procedure?
If you are wondering why it is not required to drop the temp table at the end of the stored procedure, well, it is because when the stored procedure completes execution, it automatically drops the temp table when the connection/session is dropped which was executing it.
How do I know if a temp table exists?
Check If Temporary Table or Temp Table Exists in SQL Server…
- create table TestTable(id int) …
- create table #TestTable(id int) …
- select * from tempdb.sys.tables where name like ‘#TestTable%’
- select object_id(‘tempdb..#TestTable’,’U’)
- if object_id(‘tempdb..#TestTable’,’U’) is not null.
How do I view a temp table in SQL?
Now, to see where this table exists; go to “Object Explorer -> Databases -> System Databases-> tempdb -> Temporary Tables”. You will see your temporary table name along with the identifier.
Can we pass table variable into stored procedure?
Passing table-valued parameters to a stored procedure is a three-step process: Create a user-defined table type that corresponds to the table that you want to populate. … Inside the stored procedure, select the data from the passed parameter and insert it into the table that you want to populate.
What is the difference between table variable and temp table in SQL Server?
Temporary Tables are physically created in the tempdb database. … Table Variable acts like a variable and exists for a particular batch of query execution. It gets dropped once it comes out of batch. It is created in the memory database but may be pushed out to tempdb.