数据库delete语句菜鸟_MySQL视图

DELETE FROM table_name  where    table_name.name='dell'

DELETE FROM customers ORDER BY Name LIMIT 10

DELETE  a FROM tablename AS a LEFT JOIN temp_name AS b ON a.ID = b.ID WHERE b.UserID > 0;


DELETE  a FROM tablename AS a LEFT JOIN temp_name AS b ON a.ID = b.ID WHERE b.ID IS not null;

USE testdb;
CREATE TABLE buildings (
    building_no INT PRIMARY KEY AUTO_INCREMENT,
    building_name VARCHAR(255) NOT NULL,
    address VARCHAR(255) NOT NULL
)ENGINE=InnoDB DEFAULT CHARSET=utf8;

USE testdb;
CREATE TABLE rooms (
    room_no INT PRIMARY KEY AUTO_INCREMENT,
    room_name VARCHAR(255) NOT NULL,
    building_no INT NOT NULL,
    FOREIGN KEY (building_no)
        REFERENCES buildings (building_no)
        ON DELETE CASCADE
)ENGINE=InnoDB DEFAULT CHARSET=utf8;

INSERT INTO buildings(building_name,address)
VALUES('海南大厦','海口市国兴大道1234号'),
      ('万达水城','海口市大同路1200号');

INSERT INTO rooms(room_name,building_no)
VALUES('Amazon',1),
      ('War Room',1),
      ('Office of CEO',1),
      ('Marketing',2),
      ('Showroom',2);

DELETE FROM buildings WHERE building_no = 2;