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MySQL query to find latest 3 dates in a table and the resultant dates shouldn’t be duplicate
To find the latest dates, order the date records with ORDER BY DESC. Since we want only 3 dates, use LIMIT 3.
Let us first create a table −
mysql> create table DemoTable ( AdmissionDate date ); Query OK, 0 rows affected (0.56 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values('2019-09-04');
Query OK, 1 row affected (0.09 sec)
mysql> insert into DemoTable values('2019-08-10');
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable values('2019-09-21');
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable values('2019-09-18');
Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable values('2019-09-21');
Query OK, 1 row affected (0.08 sec)
mysql> insert into DemoTable values('2019-08-18');
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable values('2019-09-18');
Query OK, 1 row affected (0.19 sec)
mysql> insert into DemoTable values('2019-09-16');
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 | +---------------+ | 2019-09-04 | | 2019-08-10 | | 2019-09-21 | | 2019-09-18 | | 2019-09-21 | | 2019-08-18 | | 2019-09-18 | | 2019-09-16 | +---------------+ 8 rows in set (0.00 sec)
Following is the query to find the latest 3 dates in a table −
mysql> select AdmissionDate from (select distinct AdmissionDate from DemoTable) tbl order by AdmissionDate desc limit 3;
This will produce the following output −
+---------------+ | AdmissionDate | +---------------+ | 2019-09-21 | | 2019-09-18 | | 2019-09-16 | +---------------+ 3 rows in set (0.00 sec)
Updated on: 04-Oct-2019
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