Last post Jul 31, 2018 07:14 AM by Deepak Panchal
Jul 30, 2018 03:47 AM|sidu|LINK
i am litttle confusing about when we need To use
cte and temp table in sql server
give me with real time example
thanks and regards
Jul 30, 2018 04:04 AM|vahid bakkhi|LINK
Temp Tables are physically created in the Tempdb database. These tables act as the normal table and also can have constraints, index like normal tables. It is divided into two Local temp tables and Global Temp Table, Local Temp table are only available to
the SQL Server session or connection (means single user) that created the tables. Global temp tables are available to all SQL Server sessions or connections (means all the user). These can be created by any SQL Server connection user and these are automatically
deleted when all the SQL Server connections have been closed.cases where you need transaction rollback support.
CTE - Common table Expression is a named temporary result set which is used to manipulate the complex sub-queries data. This exists for the scope of statement. This is created in memory rather than Tempdb database. You cannot create any index on CTE.
Jul 30, 2018 10:26 PM|vinz|LINK
Jul 31, 2018 07:14 AM|Deepak Panchal|LINK
The CTE is an abbreviation of “Common Table Expression.” CTE was introduced in SQL Server. It works as a temporary result set that is defined within the execution scope of a single select, insert, update, delete statements. CTE is typically the result
of complex sub queries. Similar to temporary tables CTE doesn’t store as an object; the scope is limited to the current query. CTE improves readability and ease in maintenance of complex queries and sub-queries.
Temporary tables are tables that are available only to the session that created them.
These tables are automatically destroyed at the termination of the procedure or session that created them. SQL Server provides the concept of temporary table which helps the developers in a great way. These tables can be created at runtime and can do all kinds
of operations that one normal table can do. In SQL Server all temporary tables are present in tempdbdatabase.
Types of Temporary Tables:
SQL Server contain two types of Temporary tables:
You can try to refer links below to get detailed information.
CTE Vs Temp Table Vs Table Variable
Differences Among CTE, Derived Table, Temp Table, Sub Query And Temp Variable
CTE’s vs Temp tables – an Opinion