Question

如何选择不在company = c和leg = 2处的行没有特定的数据库功能

+---------+-----+
| company | leg |
+---------+-----+
| c       |   1 |
| b       |   2 |
| c       |   2 |
| d       |   1 |
+---------+-----+

并获得：

+---------+-----+
| company | leg |
+---------+-----+
| a       |   1 |
| b       |   2 |
| d       |   1 |
+---------+-----+

这是典型的错误方式：

SELECT *
FROM   mytable
WHERE  company <> 'c' AND leg <> 2

Answer 1

您可以简单地将这两个条件放在where子句中：

SELECT *
FROM   mytable
WHERE  company <> 'c' OR leg <> 2

Answer 2

您可以尝试-

select company, leg
from table-name
where company != 'c'
and leg != 2

Answer 3

您可以尝试一下

 select company,leg from mytable where company !='c' OR leg !=2;

结果：

    +---------+-----+
    | company | leg |
    +---------+-----+
    | c       |   1 |
    | b       |   2 |
    | d       |   1 |
    +---------+-----+

Answer 4

尝试一下：

SELECT * FROM TABLE_NAME WHERE COMPANY !='c' AND LEG !='2';

sql：选择两列值所在的行

4 个答案: