MySQL query to delete all rows older than 30 days?

To delete all rows older than 30 days, you need to use the DELETE with INTERVAL. Use

Let us first create a table −

mysql> create table DemoTable
   -> (
   -> UserMessage text,
   -> UserMessageSentDate date
   -> );
Query OK, 0 rows affected (0.59 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable values('Hi','2019-06-01');
Query OK, 1 row affected (0.11 sec)

mysql> insert into DemoTable values('Hello','2019-07-02');
Query OK, 1 row affected (0.14 sec)

mysql> insert into DemoTable values('Awesome','2019-05-04');
Query OK, 1 row affected (0.15 sec)

mysql> insert into DemoTable values('Good','2019-01-10');
Query OK, 1 row affected (0.35 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

Output

+-------------+---------------------+
| UserMessage | UserMessageSentDate |
+-------------+---------------------+
| Hi          | 2019-06-01          |
| Hello       | 2019-07-02          |
| Awesome     | 2019-05-04          |
| Good        | 2019-01-10          |
+-------------+---------------------+
4 rows in set (0.00 sec)

Following is the query to delete all rows older than 30 days −

mysql> delete from DemoTable where UserMessageSentDate < now() - interval 30 DAY;
Query OK, 3 rows affected (0.11 sec)

Let us check table records once again −

mysql> select *from DemoTable;

Output

+-------------+---------------------+
| UserMessage | UserMessageSentDate |
+-------------+---------------------+
| Hello       | 2019-07-02          |
+-------------+---------------------+
1 row in set (0.00 sec)