How do you check and drop a temp table in SQL?
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 find temp tables in SQL Server?
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.
How do I drop 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.
How do you check and drop a table in SQL Server?
SQL Server DROP TABLE
- First, specify the name of the table to be removed.
- Second, specify the name of the database in which the table was created and the name of the schema to which the table belongs. The database name is optional. …
- Third, use IF EXISTS clause to remove the table only if it exists.
How do I check if a temp table exists?
Again, the best sure-fire way to do it is to just check for OBJECT_ID(‘TEMPDB.. #TEST’)… if it’s NOT NULL, then the temp table exists.
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.
What happens if temp table is not dropped?
if you do not drop the temp table, then call the dbo. MyProc again in the same session, you will get an exception thrown when the code tries to create the temp table again.
What is temporary tables in SQL?
Temporary Tables. A temporary table is a base table that is not stored in the database but instead exists only while the database session in which it was created is active. … You must add data to a temporary table with SQL INSERT commands.
Do we need to drop temp table in SQL Server?
No… you don’t need to drop temp tables. That notwithstanding, I tend to do a conditional drop at the beginning of a sproc and it has nothing to do with any effect on the spoc. Rather, they are an artifact from development and testing prior to conversion to a stored procedure.
Do temp tables make queries run faster?
I have often found that temp tables speed things up, sometimes dramatically. The simple explanation is that it makes it easier for the optimiser to avoid repeating work. Of course, I’ve also seen temp tables make things slower, sometimes much slower.
Which command will return a list of triggers?
SHOW TRIGGERS lists the triggers currently defined for tables in a database (the default database unless a FROM clause is given). This statement returns results only for databases and tables for which you have the TRIGGER privilege.