查询当天的数据
方法一：
SET @dt = CURDATE(); SELECT * FROM table_name WHERE condition1 AND conditions2 AND column_name=@dt;
方法二：
/*使用函数*/ SELECT * FROM table_name WHERE condition1 AND condition2 AND date(column_name)= CURDATE();
方法三：
SELECT * FROM table_name WHERE condition1 AND condition2 AND TO_DAYS(column_name)= TO_DAYS(NOW());
查询一周的数据
SELECT * FROM table_name WHERE condition1 AND condition2 AND DATE_SUB(CURDATE(), INTERVAL 7 DAY) <= date(column_name);
方法二：
SELECT * FROM table_name WHERE condition1 AND condition2 AND DATE_SUB(CURDATE(), INTERVAL 1 WEEK) <= date(column_name);
查询一月的数据
SELECT * FROM table_name WHERE condition1 AND condition2 AND DATE_SUB(CURDATE(), INTERVAL 1 MONTH) <= date(column_name);
查询一年的数据
SELECT * FROM table_name WHERE condition1 AND condition2 AND DATE_SUB(CURDATE(), INTERVAL 1 YEAR) <= date(column_name);