Question

我使用了一些子查询，如果我要给硬编码的id工作，则根本不起作用。

SELECT
  (
  SELECT
    COUNT(*)
  FROM
    inventory_set_variations isv
  WHERE
    isv.c_catid LIKE '%[{"id":"c1.catid"}]%' AND isv.company_id = 1
) AS 'count_total_no_of_variations',
`c1`.`catid` AS `catid`

FROM
   category c1
WHERE
  (
    `c1`.`catsid` <> 3 AND c1.company_id = '1'
  )

这不起作用，

下面的代码正在工作，因为我提供了硬编码数据

SELECT
  (
  SELECT
    COUNT(*)
  FROM
    inventory_set_variations isv
  WHERE
    isv.c_catid LIKE '%[{"id":"1000020"}]%' AND isv.company_id = 1
) AS 'count_total_no_of_variations',
`c1`.`catid` AS `catid`

FROM
   category c1
WHERE
  (
    `c1`.`catsid` <> 3 AND c1.company_id = '1'
  )

Answer 1

您可以使用CONCAT形成like条件

更改

LIKE '%[{"id":"c1.catid"}]%'

到

LIKE CONCAT('%[{"id":"',c1.catid,'"}]%')

像在mySql子查询中不起作用

1 个答案: