如何使用預處理語句建立表並在該表中插入值?
可以透過遵循以下示例理解,在示例中我們使用預處理語句建立名為“Student”的表——
mysql> PREPARE stmt3 FROM 'CREATE TABLE Student(Id INT, Name Varchar(20))'; Query OK, 0 rows affected (0.00 sec) Statement prepared mysql> EXECUTE stmt3; Query OK, 0 rows affected (0.73 sec) mysql> DEALLOCATE PREPARE stmt3; Query OK, 0 rows affected (0.00 sec)
現在,我們可以藉助使用預處理語句的以下查詢向表“Student”中插入值——
mysql> PREPARE stmt7 FROM 'INSERT INTO Student(Id,Name) values(?,?)'; Query OK, 0 rows affected (0.00 sec) Statement prepared mysql> SET @A = 1, @B = 'Ram'; Query OK, 0 rows affected (0.00 sec) mysql> EXECUTE stmt7 using @A, @B; Query OK, 1 row affected (0.04 sec) mysql> SET @A = 2, @B = 'Shyam'; Query OK, 0 rows affected (0.00 sec) mysql> EXECUTE stmt7 using @A, @B; Query OK, 1 row affected (0.08 sec) mysql> SET @A = 3, @B = 'Mohan'; Query OK, 0 rows affected (0.00 sec) mysql> Select * from Student; +------+-------+ | Id | Name | +------+-------+ | 1 | Ram | | 2 | Shyam | | 3 | Mohan | +------+-------+ 3 rows in set (0.00 sec)
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