Question

我有这个MySQL查询（工作）

首先查询：

SELECT id
FROM users
WHERE publisher_set = '1'
AND publisher_status = '1'
AND publisher_content != ''
AND publisher_amount != '0'
AND publisher_now < publisher_max
AND EXISTS (

SELECT *
FROM user_counter
WHERE users.id = user_counter.publisher_id
)

上面的MySQL查询是从两个表中找到用户ID

现在我想再次使用第二个MySQL查询（工作）

进行比较

第二次查询：

SELECT users.id, publisher_amount, publisher_now, publisher_max, counter
FROM users
INNER JOIN user_counter ON users.id = user_counter.publisher_id
WHERE no = 08123456789
AND counter < publisher_amount

但是当我加入所有这样的查询时：

SELECT id
FROM users
WHERE publisher_set = '1'
AND publisher_status = '1'
AND publisher_content != ''
AND publisher_amount != '0'
AND publisher_now < publisher_max
AND EXISTS (

SELECT *
FROM user_counter
WHERE users.id = user_counter.publisher_id
)

AND (
SELECT users.id, publisher_amount, publisher_now, publisher_max, counter
FROM users
INNER JOIN user_counter ON users.id = user_counter.publisher_id
WHERE no =08123456789
AND counter < publisher_amount
)

我收到此错误：

操作数应包含1列

然后，我尝试使用1列，但结果不是我想要的。

我的问题是如何加入第一个和第二个查询？并且不会产生错误。

我已经尝试了谷歌它并且在经过多次“尝试和错误”之后，这是我可以使查询工作的最远。

Answer 1

我想你错过了第二个子查询的EXISTS。无论如何，如果我理解你的查询，我认为你可以写这样的查询：

SELECT
  u.id
FROM
  users u inner join user_counter uc
  on u.id=uc.publisher_id
     and no=08123456789
     and counter < publisher_amount
WHERE
  u.publisher_set = '1'
  AND u.publisher_status = '1'
  AND u.publisher_content != ''
  AND u.publisher_amount != '0'
  AND u.publisher_now < publisher_max

Answer 2

您可以将第一个EXISTS子句更改为：

and users.id in (select user_counter.publisher_id from user_counter)

并在最终查询中使用EXISTS。

Answer 3

你也可以这样做：

AND EXISTS (

SELECT user_counter.publisher_id
FROM user_counter
WHERE users.id = user_counter.publisher_id

PS：由于某种原因，SQLFIDDLE在我的最终不起作用。其他人很乐意给你演示;）

Answer 4

SELECT id
FROM users
WHERE publisher_set = '1'
AND publisher_status = '1' 
AND publisher_content != ''
AND publisher_amount != '0'
AND publisher_now < publisher_max
AND EXISTS (
select 1 from  user_counter where  users.id = user_counter.publisher_id
    and  no =08123456789
AND counter < publisher_amount
)

假设no和counter在表user_counter上。没有架构有点难以分辨。

MySQL错误：操作数应包含1列

4 个答案: