PHP數據如果數據不爲空

Question

我需要一些幫助。

我想計算一些列，但我的查詢計數不正確。

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

計數上傳值，如果上傳的值不爲空，並檢查選項=「1」

所以如果上傳值不爲空，並選擇= 1，那麼指望它。

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 

我查詢計數所有選項= 1只，但它需要數：

如果上傳的值不爲空，並選擇是1，那麼指望它。

什麼我需要做的查詢計數上傳不空和選項= 1任何人都可以在這方面幫助我？

Answer 1

下面的查詢可能會工作得很好，只要確保你能獲得正確的值在$uid

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

Answer 2

你需要引號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;