mysql 按照时间段来获取数据的方法

SELECT * FROM `table` WHERE date(时间字段) = curdate();

SELECT *
FROM `table`
WHERE month( 时间字段) = month( now( ) ) ;

SELECT *
FROM `table`
WHERE month( from_unixtime( reg_time ) ) = month( now( ) ) ;

SELECT *
FROM `table`
WHERE month( from_unixtime( reg_time ) ) = month( now( ) ) -1;