MySQL--读锁（表级锁）案例分析

￡神魔★判官ぃ 2021-08-13 13:40 378阅读 0赞

### 读锁案例分析 ###

**建表及准备数据：**

CREATE TABLE mylock(
    id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
    name VARCHAR(20)
    )ENGINE MYISAM;
    
    
    INSERT INTO mylock(name) VALUES('a');
    INSERT INTO mylock(name) VALUES('b');
    INSERT INTO mylock(name) VALUES('c');
    INSERT INTO mylock(name) VALUES('d');
    INSERT INTO mylock(name) VALUES('e');
    
    select * from mylock;

#手动增加表锁
    lock table 表名 read(write), 表名2 read(write), 其他;
    
    #查看表上加过的锁
    show open tables;

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