ROW_COUNT() returns the number of rows updated, inserted, or deleted by the preceding statement.
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mysql>
mysql>
mysql> CREATE TABLE t (id INT NOT NULL);
Query OK, 0 rows affected (0.01 sec)
mysql>
mysql> INSERT INTO t VALUES(1),
-> (2),
-> (3);
Query OK, 3 rows affected (0.00 sec)
Records: 3 Duplicates: 0 Warnings: 0
mysql>
mysql> SELECT ROW_COUNT();
+-------------+
| ROW_COUNT() |
+-------------+
| 3 |
+-------------+
1 row in set (0.00 sec)
mysql>
mysql> DELETE FROM t WHERE id IN(1,2);
Query OK, 2 rows affected (0.00 sec)
mysql>
mysql> SELECT ROW_COUNT();
+-------------+
| ROW_COUNT() |
+-------------+
| 2 |
+-------------+
1 row in set (0.02 sec)
mysql>
mysql> drop table t;
Query OK, 0 rows affected (0.00 sec)
mysql>
mysql>
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