MySQL 如何根据条件进行排序和选择查询

下面是语法 −

select * from yourTableName order by yourColumnName=0,yourColumnName;

让我们首先创建一个表 −

mysql> create table DemoTable1348
   -> (
   -> Amount int
   -> );
Query OK, 0 rows affected (0.80 sec)

使用insert命令在表中插入一些记录 −

mysql> insert into DemoTable1348 values(100);
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable1348 values(0);
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable1348 values(90);
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable1348 values(45);
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable1348 values(0);
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable1348 values(89);
Query OK, 1 row affected (0.12 sec)

使用select语句显示表中的所有记录 −

mysql> select * from DemoTable1348;

这将产生以下输出 −

+--------+
| Amount |
+--------+
|    100 |
|      0 |
|     90 |
|     45 |
|      0 |
|     89 |
+--------+
6 rows in set (0.00 sec)

下面是按条件排序和选择查询的查询语句 −

mysql> select * from DemoTable1348 order by Amount=0,Amount;

这将产生以下输出 −

+--------+
| Amount |
+--------+
|     45 |
|     89 |
|     90 |
|    100 |
|      0 |
|      0 |
+--------+
6 rows in set (0.00 sec)

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