phpMyadmin 在 sql 查询中返回 0 行

Question

这是我的查询

SELECT * from status_votes where vote = 'like' and status_id = 1 and item_poster = 'LUcase'

它返回 0 行，但是当我查看表时，有与我的查询匹配的行

请让我知道我哪里出错了...

Answer 1

尝试减少查询以查看哪个 WHERE 子句导致问题：

一次尝试以下一行：

SELECT * from status_votes where vote = 'like' and status_id = 1 and item_poster = 'LUcase'
SELECT * from status_votes where vote = 'like' and status_id = 1 and item_poster = 'Lucase'
SELECT * from status_votes where vote = 'like' and item_poster = 'LUcase'
SELECT * from status_votes where status_id = 1 and item_poster = 'LUcase'
SELECT * from status_votes where vote = 'like' 
SELECT * from status_votes where status_id = 1 
SELECT * from status_votes where item_poster = 'LUcase'
SELECT * from status_votes 

找出问题应该不难...

Answer 2

我的假设是，在查看 phpMyAdmin 中的值时，您的数据中可能有前导或尾随空格不可见。 您能否尝试在 phpMyAdmin 中编辑一条记录，看看它是否确实包含空格。

请尝试运行此查询：

SELECT *
FROM status_votes
WHERE TRIM(vote) = 'like'
AND status_id = 1
AND TRIM(item_poster) = 'LUcase';

如果这不起作用，你能分享你的表结构吗？

Answer 3

尝试以下查询：

SELECT * FROM `status_votes`
 WHERE `vote` = 'like'
   AND `status_id` = '1'
   AND `item_poster` = 'LUcase'