LAST_INSERT_ID() returns the first automatically generated value set for an AUTO_INCREMENT column
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If you insert multiple rows using a single INSERT statement, LAST_INSERT_ID() returns the value generated for the first inserted row only. |
mysql> mysql> CREATE TABLE t ( -> id INT AUTO_INCREMENT NOT NULL PRIMARY KEY, -> name VARCHAR(10) NOT NULL -> ); Query OK, 0 rows affected (0.03 sec)
mysql> mysql> INSERT INTO t VALUES (NULL, 'Bob'); Query OK, 1 row affected (0.00 sec)
mysql> mysql> SELECT * FROM t; +----+------+ | id | name | +----+------+ | 1 | Bob | +----+------+ 1 row in set (0.00 sec)
mysql> SELECT LAST_INSERT_ID(); +------------------+ | LAST_INSERT_ID() | +------------------+ | 1 | +------------------+ 1 row in set (0.00 sec)
mysql> mysql> INSERT INTO t VALUES (NULL, 'Mary'), -> (NULL, 'Jane'), -> (NULL, 'Lisa'); Query OK, 3 rows affected (0.02 sec) Records: 3 Duplicates: 0 Warnings: 0
mysql> mysql> SELECT * FROM t; +----+------+ | id | name | +----+------+ | 1 | Bob | | 2 | Mary | | 3 | Jane | | 4 | Lisa | +----+------+ 4 rows in set (0.00 sec)
mysql> mysql> SELECT LAST_INSERT_ID(); +------------------+ | LAST_INSERT_ID() | +------------------+ | 2 | +------------------+ 1 row in set (0.00 sec)
mysql> mysql> drop table t; Query OK, 0 rows affected (0.00 sec)
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