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doc: update docs/mysql.md fixed #827

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jaywcjlove
2024-09-17 20:35:23 +08:00
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docs/mysql.md
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@ -167,10 +167,11 @@ ALTER TABLE t DROP constraint;
ALTER TABLE t1 RENAME TO t2;
```
将列c1重命名为c2
将列 c1 重命名为 c2
```sql
ALTER TABLE t1 RENAME c1 TO c2 ;
ALTER TABLE t1 CHANGE c1 c2 datatype;
ALTER TABLE table_name RENAME COLUMN c1 TO c2;
```
将列c1的数据类型改为datatype