Compare date when the AdmissionDate is less than the current date in MySQL

Let us first create a table −

mysql> create table DemoTable (    AdmissionDate varchar(50) ); Query OK, 0 rows affected (0.63 sec)

Note − Let’s say the current date is 14-Sep-2019.

Insert some records in the table using insert command. Following is the query −

mysql> insert into DemoTable values('15-Sep-2019'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('14-Sep-2019'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('13-Sep-2016'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('13-Sep-2019'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values('13-Sep-2020'); Query OK, 1 row affected (0.10 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output −

+---------------+ | AdmissionDate | +---------------+ | 15-Sep-2019 | | 14-Sep-2019 | | 13-Sep-2016 | | 13-Sep-2019 | | 13-Sep-2020 | +---------------+ 5 rows in set (0.00 sec)

Following is the query to compare date when the AdmissionDate is less than the current date −

mysql> select *from DemoTable where str_to_date(AdmissionDate,'%d-%b-%Y') < CURDATE();

This will produce the following output −

+---------------+ | AdmissionDate | +---------------+ | 13-Sep-2016 | | 13-Sep-2019 | +---------------+ 2 rows in set (0.00 sec)