MySql之数据操作

1. 插入完整数据（顺序插入）
    语法一：
    INSERT INTO 表名(字段1,字段2,字段3…字段n) VALUES(值1,值2,值3…值n);

    语法二：
    INSERT INTO 表名 VALUES (值1,值2,值3…值n);

2. 指定字段插入数据
    语法：
    INSERT INTO 表名(字段1,字段2,字段3…) VALUES (值1,值2,值3…);

3. 插入多条记录
    语法：
    INSERT INTO 表名 VALUES
        (值1,值2,值3…值n),
        (值1,值2,值3…值n),
        (值1,值2,值3…值n);
        
4. 插入查询结果
    语法：
    INSERT INTO 表名(字段1,字段2,字段3…字段n) 
                    SELECT (字段1,字段2,字段3…字段n) FROM 表2
                    WHERE …;

mysql> insert into auth (id,name,age,address) values (null,'fuyong',18,'河南');
Query OK, 1 row affected (0.05 sec)

mysql> insert into auth values(null,'xiaohua',16,'四川');
Query OK, 1 row affected (0.07 sec)

mysql> insert into auth (id,name) values (null,'小明');
Query OK, 1 row affected (0.05 sec)

mysql> insert into auth value(null,'勒布朗',33,'克利夫兰'),(null,'科比',42,'洛杉矶');
Query OK, 2 rows affected (0.07 sec)
Records: 2  Duplicates: 0  Warnings: 0

mysql> insert into auth2 select * from auth;
Query OK, 6 rows affected (0.06 sec)
Records: 6  Duplicates: 0  Warnings: 0

语法：
    UPDATE 表名 SET
        字段1=值1,
        字段2=值2,
        WHERE CONDITION;

mysql> update auth set name = '付勇' where id = 2;
Query OK, 1 row affected (0.03 sec)
Rows matched: 1  Changed: 1  Warnings: 0

语法：
    DELETE FROM 表名 
        WHERE CONITION;

mysql> delete from auth where id = 1;
Query OK, 1 row affected (0.04 sec)

mysql> delete from auth2;
Query OK, 6 rows affected (0.09 sec)

mysql> truncate table auth2;
Query OK, 0 rows affected (0.28 sec)