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，会有与我的查询匹配的行

请让我知道我哪里出错...

Answer 1

尝试减少查询以查看哪个WHERE子句导致问题：

一次尝试这一行：

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 

解决问题应该不难......

Answer 2

我的假设是，数据中可能存在前导或尾随空格，看不到phpMyAdmin中的值。你可以尝试在phpMyAdmin中编辑一条记录，看看它是否真的包含空格。

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，请您分享一下表结构吗？

Answer 3

尝试以下查询：

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