In SQL Server, is the identity value generated/assigned on insert statement execution or on transaction commit?
Question
Some table has an INT column with primary key and identity constraints. When two concurrent transactions are inserting a row into the table, which of the transactions will end up with HIGHER column value, the one that executed INSERT statement later or the one that ended/committed later?
1 answers
solution1
0 ACCPTED 2016-09-20 05:13:41
在执行INSERT操作期间正在生成ID，因此在插入（2）之前执行的insert（1）将具有较低的ID（当然，如果增量为正:)）
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.
Related Question
Specify “NEXT VALUE” for INSERT statement using identity column in SQL Server
SQL Server Insert vs Delete and Commit Transaction
Is rollback required in SQL Server when transaction failed in commit tran statement
SQL SERVER : Sequential identity value on Insert
SQL Server : insert identity
SQL Server Partial commit in transaction
Rollback and commit transaction SQL Server
SQL Server / Oracle : insert value from a select statement for an non-identity column (Insert into…values((select statement), value1, value2, value3)
SQL Server INSERT statement's OUTPUT clause not returning identity values
Transaction count after EXECUTE indicates that a COMMIT or ROLLBACK TRANSACTION statement is missing - SQL server 2005
Related Tags