Temporary Tables / Temp Tables
Temporary tables are very similar to the permanent tables. Permanent tables get created in the specified database and it’s stored permanently until user Delete. But, temporary tables get created in the TempDB and are automatically deleted, when they are no longer used.
Types of Temporary tables.
Local Temporary table
Global Temporary Table
Local Temporary table
Local temporary tables are stored in tempdb. Local temporary tables are available only to the Particular session that created by user, temp tables are automatically destroyed at the termination or close of the procedure or session.
Local temp table created with prefix
for example name
the temporary table also consists of a sequence of numbers as a postfix. This is a unique identifier for the temporary table. Because multiple database connections can create temporary tables with the same name, SQL Server automatically appends this unique number at the end of the temporary table name
--LOCAL Temporary Table:
Local temporary tables are stored in tempdb. Local temporary tables are available only to the Particular session that created by user. These tables are automatically destroyed at the termination or close of the procedure or session.
Local temp table created with prefix for example name and these temp tables can be created with the same name in multiple sessions. Each table contain unique number at end of tablename allocated by server
--SYNTAX:
CREATE TABLE
(
column_name Datatype (Size) Constraint,
column_name2 Datatype (Size) Constraint,
)
--Global Temporary Table:
Global temporary tables are also stored in tempdb. Global temporary tables are temporary tables that are available to all sessions and all users. They are dropped automatically when the last session using the temporary table has completed.
They are specified with the prefix for example
--Syntax:
CREATE TABLE
(
column_name1 Datatype (Size) Constraint,
column_name2 Datatype (Size) Constraint,
)
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