MySQL 如何在MySQL的INSERT INTO语句中未指定列名的情况下插入列的值？

如果要在INSERT INTO语句中未指定列名的情况下插入列的值，则必须给出与表中列数相匹配的值的数量，并同时考虑该列的数据类型。

阅读更多：MySQL 教程

示例

在下面的示例中，我们已经插入了未指定列名的值。

mysql> Insert into student values(100,'Gaurav','Ph.D');
Query OK, 1 row affected (0.08 sec)

mysql> Select * from student;
+--------+--------+--------+
| RollNO | Name   | Class  |
+--------+--------+--------+
| 100    | Gaurav | Ph.D   |
+--------+--------+--------+

1 row in set (0.00 sec)

mysql> Insert into student values(200,'Rahul','Ph.D'),(300,'Aarav','B.tech');
Query OK, 2 rows affected (0.12 sec)
Records: 2 Duplicates: 0 Warnings: 0

mysql> Select * from student;

+--------+--------+--------+
| RollNO | Name   | Class  |
+--------+--------+--------+
| 100    | Gaurav | Ph.D   |
| 200    | Rahul  | Ph.D   |
| 300    | Aarav  | B.tech |
+--------+--------+--------+

3 rows in set (0.00 sec)

如果我们不注意列的总数和数据类型，MySQL会抛出错误，如下所示：

mysql> Insert into student values(400,'Raman',M.Tech);
ERROR 1054 (42S22): Unknown column 'M.Tech' in 'field list'

mysql> Insert into student values(400,'Raman');
ERROR 1136 (21S01): Column count doesn't match value count at row 1