以下是格式化日期的方式:
XXXXXX001221
这个日期是12月21日
如果我想使用CURDATE()函数获取昨天的条目,我该如何做?
答案 0 :(得分:1)
如果你只是在做一个月 - (索引是基于CURDATE()的字符串格式,即YYYY-MM-DD):
SELECT * FROM table_name
WHERE date_field LIKE
CONCAT('%', SUBSTR(DATE_SUB(CURDATE(), INTERVAL 1 DAY) FROM 6 FOR 2),
SUBSTR(DATE_SUB(CURDATE(), INTERVAL 1 DAY) FROM 9 FOR 2));
使用EXTRACT()的替代方法:
SELECT * FROM table_name
WHERE date_field LIKE
CONCAT('%', EXTRACT(MONTH FROM DATE_SUB(CURDATE(), INTERVAL 1 DAY)),
EXTRACT(DAY FROM DATE_SUB(CURDATE(), INTERVAL 1 DAY)));
一年也是:
SELECT * FROM table_name
WHERE date_field LIKE
CONCAT('%', SUBSTR(DATE_SUB(CURDATE(), INTERVAL 1 DAY) FROM 3 FOR 2),
SUBSTR(DATE_SUB(CURDATE(), INTERVAL 1 DAY) FROM 6 FOR 2),
SUBSTR(DATE_SUB(CURDATE(), INTERVAL 1 DAY) FROM 9 FOR 2));
SELECT * FROM table_name
WHERE date_field LIKE
CONCAT('%', EXTRACT(YEAR FROM DATE_SUB(CURDATE(), INTERVAL 1 DAY)),
EXTRACT(MONTH FROM DATE_SUB(CURDATE(), INTERVAL 1 DAY)),
EXTRACT(DAY FROM DATE_SUB(CURDATE(), INTERVAL 1 DAY)));
编辑:代替WHERE date_field LIKE ...
,您可以使用代码中提到的WHERE RIGHT(date_field, 6) = ...
来回答:
SELECT * FROM table_name
WHERE RIGHT(date_field, 4) =
CONCAT(EXTRACT(MONTH FROM DATE_SUB(CURDATE(), INTERVAL 1 DAY)),
EXTRACT(DAY FROM DATE_SUB(CURDATE(), INTERVAL 1 DAY)));
SELECT * FROM table_name
WHERE RIGHT(date_field, 6) =
CONCAT(EXTRACT(YEAR FROM DATE_SUB(CURDATE(), INTERVAL 1 DAY)),
EXTRACT(MONTH FROM DATE_SUB(CURDATE(), INTERVAL 1 DAY)),
EXTRACT(DAY FROM DATE_SUB(CURDATE(), INTERVAL 1 DAY)));
注意:您也可以使用变量来保存计算DATE_SUB(CURDATE(),INTERVAL 1 DAY)。
SET @yesterday = DATE_SUB(CURDATE(), INTERVAL 1 DAY);
SELECT ...
答案 1 :(得分:0)
尝试类似:
SELECT * FROM table WHERE RIGHT(date_col, 6) = (SELECT CONVERT(VARCHAR(6), GETDATE()-1, 12) AS [YYMMDD])