在 MySQL 中对非零整数重新排序?
要对非零整数重新排序,请使用以下语法:-
select *from yourTableName order by yourColumnName=0 ,yourColumnName;
让我们首先创建一个表:-
mysql> create table reorderIntegerExcept0 -> ( -> value int -> ); Query OK, 0 rows affected (0.70 sec)
以下是使用 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)
以下是重新排序非零整数的查询:-
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)
如果你希望非 0 整数降序排列,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)
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