Open laidu opened 6 years ago
参考: [SQL 中 Select count()、Count(1)、Count(0)的区别](https://blog.csdn.net/HeatDeath/article/details/78910658)
参考: [SQL 中 Select count()、Count(1)、Count(0)的区别](https://blog.csdn.net/HeatDeath/article/details/78910658)