MySQL查询选择值= 1或值= 2,值= 3,等等的列?
让我们首先创建一个表-
mysql> create table DemoTable(
UserId int,
UserName varchar(10),
UserAge int
);
使用插入命令在表中插入记录-
mysql> insert into DemoTable values(101,'Chris',23);mysql> insert into DemoTable values(102,'Robert',33);
mysql> insert into DemoTable values(103,'David',25);
mysql> insert into DemoTable values(104,'Carol',35);
mysql> insert into DemoTable values(105,'Bob',29);
使用选择命令显示表中的记录-
mysql> select *from DemoTable;
这将产生以下输出-
+--------+----------+---------+| UserId | UserName | UserAge |
+--------+----------+---------+
| 101 | Chris | 23 |
| 102 | Robert | 33 |
| 103 | David | 25 |
| 104 | Carol | 35 |
| 105 | Bob | 29 |
+--------+----------+---------+
5 rows in set (0.00 sec)
以下是查询以选择其中value = 1或value = 2的列,例如在我们的表中具有不同年龄的UserAge-
mysql> select *from DemoTable where UserAge=25 or UserAge=35 or UserAge=33 or UserAge=29;
这将产生以下输出-
+--------+----------+---------+| UserId | UserName | UserAge |
+--------+----------+---------+
| 102 | Robert | 33 |
| 103 | David | 25 |
| 104 | Carol | 35 |
| 105 | Bob | 29 |
+--------+----------+---------+
4 rows in set (0.00 sec)
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