Delete all rows in the table, but keep the table structure and its columns, constraints, indexes unchanged. truncate table [Table name]

 

Original post address: http://hi.baidu.com/liyanlin84/blog/item/eb306616cdb51e1c972b4389.html

Delete all data in the table, and you want to automatically increase the column from 1! Use truncate table tblname

 

Truncate is a SQL statement used to delete data table content. It is used as follows:Truncate table [Table name].
The following describes the methods and principles of the truncate statement in mssqlserver2000:
The truncate table name is fast and efficient because:
The truncate table function is the same as the delete statement without the WHERE clause: both delete all rows in the table. However, truncate table is faster than delete and uses less system and transaction log resources.
The delete statement deletes a row at a time and records one row in the transaction log. Truncate table deletes data by releasing the data pages used to store table data, and only records the release of pages in transaction logs.
Truncate table deletes all rows in the table, but the table structure, its columns, constraints, and indexes remain unchanged. The Count value used by the new row ID is reset to the seed of the column. To retain the ID Count value, use Delete instead. To delete table definitions and data, use the drop TABLE statement.
For tables referenced by the foreign key constraint, the truncate table cannot be used, but the delete statement without the WHERE clause should be used. Because the truncate table is not recorded in the log, it cannot activate the trigger.
The truncate table cannot be used in the index view.

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