使用 MySQL 对除值 0 之外的整数进行重新排序?
mysqlmysqli database
要对除值 0 之外的整数进行重新排序，请使用以下语法 −
select *from yourTableName order by yourColumnName=0 ,yourColumnName;
首先我们创建一个表 −
mysql> create table reorderIntegerExcept0 -> ( -> value int -> ); Query OK, 0 rows affected (0.70 sec)
下面是使用 insert 命令向表中插入记录的查询 −
mysql> insert into reorderIntegerExcept0 values(90); Query OK, 1 row affected (0.17 sec) mysql> insert into reorderIntegerExcept0 values(10); Query OK, 1 row affected (0.21 sec) mysql> insert into reorderIntegerExcept0 values(0); Query OK, 1 row affected (0.18 sec) mysql> insert into reorderIntegerExcept0 values(40); Query OK, 1 row affected (0.18 sec) mysql> insert into reorderIntegerExcept0 values(0); Query OK, 1 row affected (0.09 sec) mysql> insert into reorderIntegerExcept0 values(50); Query OK, 1 row affected (0.17 sec) mysql> insert into reorderIntegerExcept0 values(80); Query OK, 1 row affected (0.13 sec) mysql> insert into reorderIntegerExcept0 values(0); Query OK, 1 row affected (0.10 sec) mysql> insert into reorderIntegerExcept0 values(300); Query OK, 1 row affected (0.20 sec)
以下是使用 select 语句显示表中的所有记录的查询 −
mysql> select * from reorderIntegerExcept0;
这将产生以下输出 −
+-------+ | value | +-------+ | 90 | | 10 | | 0 | | 40 | | 0 | | 50 | | 80 | | 0 | | 300 | +-------+ 9 rows in set (0.00 sec)
以下是对除值 0 之外的整数进行重新排序的查询 −
mysql> select * from reorderIntegerExcept0 order by value =0 ,value;
这将产生以下输出 −
+-------+ | value | +-------+ | 10 | | 40 | | 50 | | 80 | | 90 | | 300 | | 0 | | 0 | | 0 | +-------+ 9 rows in set (0.00 sec)
如果希望对除 0 以外的整数按降序排列，请使用以下查询 −
mysql> select * from reorderIntegerExcept0 order by value =0,value DESC;
这将产生以下输出 −
+-------+ | value | +-------+ | 300 | | 90 | | 80 | | 50 | | 40 | | 10 | | 0 | | 0 | | 0 | +-------+ 9 rows in set (0.00 sec)
