Question

我有一个像

这样的查询

SELECT DISTINCT SQL_CALC_FOUND_ROWS cl.id AS id,
cl.column1 AS column1,
cl.column2 AS column2,
cl.column3 AS column3,
cl.t_sc_1 AS t_sc_1,
cl.t_sc_2 AS t_sc_2,
cl.t_sc_3 AS t_sc_3
FROM classifieds AS cl
WHERE (cl.t_sc_1 = 1 OR cl.t_sc_2 = 1 OR cl.t_sc_3 = 1)
AND column1 = 10 AND column2=10 AND column3=10
ORDER BY cl.id ASC

我想得到的结果是（t_sc_1 = 1或者t_sc_2 = 1或者t_sc_3 = 1）还是the_three_columns = 1 AND column1 = 10等等，......我得到的结果是t_sc_1 = 1和t_sc_2 = 1而t_sc_3 = 1和column1 = 10等。因此，只有t_sc_1 = 1的行或者只有column3 = 1的行才会显示在结果中。

真正的查询是动态的，有时'OR'部分包括两个cl.t_sc_1 = 1（如（cl.t_sc_1 = 1 OR cl.t_sc_2 = 1））有时包括示例中的三个。

我知道条款是否不存在但是有没有办法实现这个目标？

感谢您的帮助

Answer 1

让我们来电话

column1 = 1   as  a
column2 = 1   as  b
column3 = 1   as  c
column4 = 10  as  d

你说的你想要的是：

(a + b + c) + (a.b.c.d)
= a + b + c + a.b.c.d

使用布尔代数，相当于：

a + b + c.(1 + a.b.d)
= a + b + c.1
= a + b + c

这意味着：

where (
    column1 = 1
    or column2 = 1
    or column3 = 1
    )
or (
    column1 = 1
    and column2 = 1
    and column3 = 1
    and column4 = 10
    )

相当于：

where column1 = 1
    or column2 = 1
    or column3 = 1

或者：

where 1 in (column1, column2, column3);

Answer 2

您当前的查询省略了您口头描述给我们的一些逻辑。试试这个：

select *
from yourTable
where (column1 = 1 or column2 = 1 or column3 = 1) or
      ((column1 = 1 and column2 = 1 and column3 = 1) and column4 = 10)
order by id asc

使用此逻辑，将返回仅包含column2 = 1的记录。

选择cl.t_sc_1 = 1 OR cl.t_sc_2 = 1 OR cl.t_sc_3 = 1 AND column1 = 10

2 个答案: