宏軍的學習筆記
```sql insert ignore into user (id, name) values (10, 'Lionel'); ``` 方法二:使用 replace
```sql replace into user (id, name) values (11, 'Luis'); ``` 方法三:使用 on duplicate key update
```sql insert into user (id, name) values (3, 'Mario') on duplicate key update name = 'Gerard'; ```