Mega Code Archive
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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