Find the difference between two timestamps in days with MySQL

Use DATEDIFF() function from MySQL to get the difference between two timestamps in days.

The syntax is as follows −

select datediff(yourColumnName1,yourColumnName2) as anyVariableName from yourTableName;

To understand the above syntax, let us create a table. The following is the query to create a table −

mysql> create table DifferenceTimestamp
   −> (
   −> IssueTime timestamp,
   −> DueTime timestamp
   −> );
Query OK, 0 rows affected (0.66 sec)

Insert some records in the table with the help of insert command. We are setting dates here. The query is as follows −

mysql> insert into DifferenceTimestamp values(now(),date_add(now(),interval -30 Day));
Query OK, 1 row affected (0.12 sec)

mysql> insert into DifferenceTimestamp values(now(),date_add(now(),interval -24 Day));
Query OK, 1 row affected (0.16 sec)

mysql> insert into DifferenceTimestamp values(now(),date_add(now(),interval -5 Day));
Query OK, 1 row affected (0.14 sec)

Display all records from the table with the help of select statement. The query is as follows −

mysql> select *from DifferenceTimestamp;

The following is the output −

+---------------------+---------------------+
| IssueTime           | DueTime             |
+---------------------+---------------------+
| 2018-12-07 17:48:28 | 2018-11-07 17:48:28 |
| 2018-12-07 17:48:40 | 2018-11-13 17:48:40 |
| 2018-12-07 17:48:46 | 2018-12-02 17:48:46 |
+---------------------+---------------------+
3 rows in set (0.00 sec)

Here is the query to get difference between two timestamps in days. The query is as follows −

mysql> SELECT DATEDIFF(IssueTime, DueTime) AS DifferenceInTimestampDays from DifferenceTimestamp;

The following is the output −

+---------------------------+
| DifferenceInTimestampDays |
+---------------------------+
|                        30 |
|                        24 | 
|                         5 |
+---------------------------+
3 rows in set (0.00 sec)