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Merge pull request #302 from lilomin/patch-1

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a sql typo
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CyC2018 2018-07-02 13:03:30 +08:00 committed by GitHub
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notes/MySQL.md
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@ -351,7 +351,7 @@ do {
- 查询本身效率也可能会有所提升。例如下面的例子中，使用 IN() 代替连接查询，可以让 MySQL 按照 ID 顺序进行查询，这可能比随机的连接要更高效。 - 查询本身效率也可能会有所提升。例如下面的例子中，使用 IN() 代替连接查询，可以让 MySQL 按照 ID 顺序进行查询，这可能比随机的连接要更高效。
```sql ```sql
SELECT * FROM tab SELECT * FROM tag
JOIN tag_post ON tag_post.tag_id=tag.id JOIN tag_post ON tag_post.tag_id=tag.id
JOIN post ON tag_post.post_id=post.id JOIN post ON tag_post.post_id=post.id
WHERE tag.tag='mysql'; WHERE tag.tag='mysql';