dounie5475 2018-01-29 16:15
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需要使用带有限制的左连接,但它工作错误

I have two sql query:

1)

SELECT DISTINCT item_id  
FROM sh_itemviews WHERE login='".$login."' 
ORDER by time DESC LIMIT 5"

2)

SELECT * 
FROM sh_item WHERE id=itemIdFrom  sh_itemviews "

So i want to do it better and i'm trying to use LEFT JOIN:

SELECT DISTINCT * 
FROM sh_itemviews 
      LEFT JOIN sh_item ON sh_item.id = sh_itemviews.item_id; 
WHERE sh_itemviews.login='".$login."' 
ORDER by sh_itemviews.time DESC LIMIT 5"

Like a result i have all data where sh_item.id = sh_itemviews.item_id; but other constructin WHERE is ignored. What i'm doing wrong? Thanks!

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3条回答 默认 最新

  • dqh19413 2018-01-29 16:19
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    Extra semi column before the WHERE clause was the reason, Find the updated query below

     SELECT DISTINCT * 
     FROM sh_itemviews 
          LEFT JOIN sh_item ON sh_item.id = sh_itemviews.item_id 
     WHERE sh_itemviews.login='".$login."' 
     ORDER by sh_itemviews.time DESC LIMIT 5"
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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