今天介绍InnoDB七种锁的第一种：自增锁(Auto-inc Locks)。 (1)事务A先执行insert，会得到一条(4, xxx)的记录，由于是自增列，故不用显示指定id为4，InnoDB会自动增长，注意此时事务并未提交； (2)事务B后执行insert，假设不会被阻塞，那会得到一条(5, ooo)的记录； 画外音 ...

Nahda Nabiilah is a writer and editor from Indonesia. She has always loved writing and playing games, so one day she decided to combine the two. Most of the time, writing gaming guides is a blast for ...

Community driven content discussing all aspects of software development from DevOps to design patterns. If you plan to do database development with Java and MySQL, the first thing you’ll need to do is ...

MySQL is one of the world’s most widely used database management systems. It is easy to install and use and is usually free. Here’s how to use it. In our previous post, we took you through the basic ...

SELECT SUM(J.preco) AS preco_total FROM jogo J JOIN Biblioteca B ON J.id = B.id_jogo JOIN Usuario U ON B.id_usuario = U.id WHERE U.nome = 'Carlos Silva'; SELECT J.titulo, J.preco FROM Jogo J JOIN ...

Ben is a writer for Game Rant. He has a passion for gaming and has been playing video games since he was 6. Ben has always been a fan of open-world games, having gotten into them back when RuneScape ...

本文介绍了 MySQL5.7 中常见的replace into 操作造成的主从auto_increment不一致现象，一旦触发了主从切换，业务的正常插入操作会触发主键冲突的报错提示。 在 MySQL 5.7 版本中，REPLACE INTO 操作在表存在自增主键的情况下，可能会出现表的auto_increment值主从不一致现象 ...