MySQL中当前日期与varchar日期记录的比较
对于日期比较，可以使用STR_TO_DATE()。以下是语法-
select * from yourTableName where str_to_date(yourColumnName,'yourFormatSpecifier') > curdate();
让我们首先创建一个-
mysql> create table DemoTable1397 -> ( -> AdmissionDate varchar(40) -> );s
使用insert在表中插入一些记录-
mysql> insert into DemoTable1397 values('01/04/2019');
mysql> insert into DemoTable1397 values('27/09/2019');
mysql> insert into DemoTable1397 values('29/09/2018');
mysql> insert into DemoTable1397 values('29/09/2019');使用选择显示表中的所有记录-
mysql> select * from DemoTable1397;
这将产生以下输出-
+---------------+ | AdmissionDate | +---------------+ | 01/04/2019 | | 27/09/2019 | | 29/09/2018 | | 29/09/2019 | +---------------+ 4 rows in set (0.00 sec)
让我们首先找到当前日期-
mysql> select curdate(); +------------+ | curdate() | +------------+ | 2019-09-27 | +------------+ 1 row in set (0.00 sec)
以下是将varchar日期与MySQL中的当前日期进行比较的查询-
mysql> select * from DemoTable1397 -> where str_to_date(AdmissionDate,'%d/%m/%Y') > curdate();
这将产生以下输出-
+---------------+ | AdmissionDate | +---------------+ | 29/09/2019 | +---------------+ 1 row in set (0.07 sec)