mysql中datediff函数怎么用使用示例：SELECT 语句：SELECT DATEDIFF('2021-4-30','2021-4-29') AS DiffDate返回结果为：1示例2：SELECT DATEDIFF('2021-4-29','2021-4-30')
datediff-datediff简介-datediff资料
datediff
mysql中datediff函数怎么用使用示例：SELECT 语句：SELECT DATEDIFF('2021-4-30','2021-4-29') AS DiffDate返回结果为：1示例2：SELECT DATEDIFF('2021-4-29','2021-4-30')
