在mysql的_set（）中执行find_

这是我的屏幕截图，显示了使用命令

find\u in\u set

执行的查询

它只执行特定行中的一组值。我希望在单个查询中执行表中与

find\u in\u set

命令匹配的所有值

看看我的代码：

select * from shirts;
+----+--------------+------------------------------------+
| id | colors       | days                               |
+----+--------------+------------------------------------+
|  1 | 1,2,5,12,15  | monday, friday, thursday           |
|  2 | 1,5,12,15,30 | tuesday,monday                     |
|  3 | 2,5,11,15,28 | monday, friday,wednesday ,thursday |
|  4 | 1,2,7,12,15  | tuesday,monday                     |
|  5 | 2,4,8,12,15  | tuesday,monday                     |
+----+--------------+------------------------------------+
5 rows in set (0.00 sec)

mysql> select * from shirts where find_in_set('5',colors) or find_in_set('30',colors) or find_in_set('30', colors) and find_in_set('monday',days) or  find_in_set('tuesday',days);
+----+--------------+------------------------------------+
| id | colors       | days                               |
+----+--------------+------------------------------------+
|  1 | 1,2,5,12,15  | monday, friday, thursday           |
|  2 | 1,5,12,15,30 | tuesday,monday                     |
|  3 | 2,5,11,15,28 | monday, friday,wednesday ,thursday |
|  4 | 1,2,7,12,15  | tuesday,monday                     |
|  5 | 2,4,8,12,15  | tuesday,monday                     |
+----+--------------+------------------------------------+
5 rows in set (0.00 sec)

mysql> select * from shirts where find_in_set('5',colors) or find_in_set('30',colors) and find_in_set('monday',days) or  find_in_set('tuesday',days);
+----+--------------+------------------------------------+
| id | colors       | days                               |
+----+--------------+------------------------------------+
|  1 | 1,2,5,12,15  | monday, friday, thursday           |
|  2 | 1,5,12,15,30 | tuesday,monday                     |
|  3 | 2,5,11,15,28 | monday, friday,wednesday ,thursday |
|  4 | 1,2,7,12,15  | tuesday,monday                     |
|  5 | 2,4,8,12,15  | tuesday,monday                     |
+----+--------------+------------------------------------+
5 rows in set (0.00 sec)

我选择了

5

和

30

的颜色和

周一、周五

的天，但它只显示

1

和

3

行

---

有人能纠正我的问题吗？

请记住，在布尔代数中，

和

的绑定比

或

更紧密

有一个问题

当你写这篇文章时：

select * from shirts where A or B and C or D

总是像这样使用括号：

select * from shirts where A or (B and C) or D

select * from shirts where (A or B) and (C or D)

但你想让它像这样：

select * from shirts where A or (B and C) or D

select * from shirts where (A or B) and (C or D)

因此，您必须使用显式括号编写查询，以覆盖

和

与

或

的默认优先顺序

---

这个问题与在_set（）中使用find_无关。这只是一个布尔代数错误。

你的截图在哪里？改进了格式，修正了语法，添加了标记