PHP数据如果数据不为空

Question

我需要一些帮助。

我想计算一些列，但我的查询计数不正确。

SELECT COUNT(*) AS zero_count FROM messages WHERE uid_fk = '$uid' AND uploads IS NOT NULL AND uploads <>'' AND option = '1' 

计数上传值，如果上传的值不为空，并检查选项=“1”

所以如果上传值不为空，并选择= 1，那么指望它。

例如：

uid_fk  uploads   option 

    1    75,    0  Not counting because secret_option is 0 
    1   76,77,   1  Count because it is 1 and upload value is not empty 
    1        1  Not count because upload value is empty 
    1    78,    1  Count because it is 1 and upload value is not empty 
    1        1  Not count because upload value is empty 
    1   79,80,   0  Not count because option is 0 

我查询计数所有选项= 1只，但它需要数：

如果上传的值不为空，并选择是1，那么指望它。

什么我需要做的查询计数上传不空和选项= 1任何人都可以在这方面帮助我？

Answer 1

下面的查询可能会工作得很好，只要确保你能获得正确的值在$uid

SELECT 
    COUNT(*) 
FROM `messages` 
WHERE TRIM(IFNULL(`uploads`, '')) != '' AND `option` = '1' AND `uid_fk` = '$uid' 

Answer 2

你需要引号option其保留字。

SELECT COUNT(*) AS 'zero_count' 
FROM `messages` m 
WHERE `option` <> 0 
    AND (`uploads` IS NOT NULL AND `uploads` <> '') 
    AND uid_fk = $uid;