为此,请使用UNION。让我们首先创建一个表-
mysql> create table DemoTable645 (Id int,FirstName varchar(100));
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable645 values(100,'Chris');
mysql> insert into DemoTable645 values(101,'Robert');
mysql> insert into DemoTable645 values(101,'Bob');
mysql> insert into DemoTable645 values(102,'Carol');
mysql> insert into DemoTable645 values(100,'John');
mysql> insert into DemoTable645 values(100,'Robert');
mysql> insert into DemoTable645 values(101,'Mike');
mysql> insert into DemoTable645 values(101,'John');
使用select语句显示表中的所有记录-
mysql> select *from DemoTable645;
这将产生以下输出-
+------+-----------+
| Id | FirstName |
+------+-----------+
| 100 | Chris |
| 101 | Robert |
| 101 | Bob |
| 102 | Carol |
| 100 | John |
| 100 | Robert |
| 101 | Mike |
| 101 | John |
+------+-----------+
8 rows in set (0.00 sec)
以下是搜索多列的查询-
mysql> select Id AS Records from DemoTable645 where Id LIKE '%100%'
union
select FirstName from DemoTable645 where FirstName LIKE '%John%'
order by 1 LIMIT 3;
这将产生以下输出-
+---------+
| Records |
+---------+
| 100 |
| John |
+---------+
2 rows in set (0.00 sec)