能在MySQL中选择包含星号的字段名吗?
不行,无法实现。但你可以在字段名周围使用反引号来处理。让我们先创建一张列名含有星号的表 Name* −
mysql> create table DemoTable
->
-> (`Name*` varchar(20)
-> );
Query OK, 0 rows affected (2.03 sec)
使用insert命令在表中插入一些记录 −
mysql> insert into DemoTable(`Name*`) values('Chris Brown');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable(`Name*`) values('David Miller');
Query OK, 1 row affected (0.19 sec)
mysql> insert into DemoTable(`Name*`) values('John Doe');
Query OK, 1 row affected (0.10 sec)
mysql> insert into DemoTable(`Name*`) values('John Smith');
Query OK, 1 row affected (0.23 sec)
使用select语句显示表中的所有记录 −
mysql> select *from DemoTable;
这将产生以下输出 −
+--------------+
| Name* |
+--------------+
| Chris Brown |
| David Miller |
| John Doe |
| John Smith |
+--------------+
4 rows in set (0.00 sec)
以下是选择包含星号的字段名的查询语句 −
mysql> select `Name*` from DemoTable;
这将产生以下输出−
+--------------+
| Name* |
+--------------+
| Chris Brown |
| David Miller |
| John Doe |
| John Smith |
+--------------+
4 rows in set (0.00 sec)
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