Fetching rows added in last hour with MySQL?

You can use date-sub() and now() function from MySQL to fetch the rows added in last hour.

Syntax

The syntax is as follows −

select *from yourTableName
where yourDateTimeColumnName <=date_sub(now(),interval 1 hour);

The above query gives the result added last hour. To understand the above concept, let us first create a table. The query to create a table is as follows −

mysql> create table LastHourRecords
-> (
-> Id int,
-> Name varchar(100),
-> Login datetime
-> );
Query OK, 0 rows affected (0.67 sec)

Insert records in the form of datetime using insert command. The query to insert record is as follows −

mysql> insert into LastHourRecords values(1,'John',' 2018-12-19 10:00:00');
Query OK, 1 row affected (0.17 sec)

mysql> insert into LastHourRecords values(2,'Carol','2018-12-19 10:10:00');
Query OK, 1 row affected (0.15 sec)

mysql> insert into LastHourRecords values(3,'Sam','2018-12-19 10:05:00');
Query OK, 1 row affected (0.13 sec)

mysql> insert into LastHourRecords values(4,'Mike','2018-12-18 12:10:00');
Query OK, 1 row affected (0.10 sec)

Display all records from the table using select statement. The query is as follows −

mysql> select *from LastHourRecords;

Output

+------+-------+---------------------+
| Id   | Name  | Login               |
+------+-------+---------------------+
| 1    | John  | 2018-12-19 10:00:00 |
| 2    | Carol | 2018-12-19 10:10:00 |
| 3    | Sam   | 2018-12-19 10:05:00 |
| 4    | Mike  | 2018-12-18 12:10:00 |
+------+-------+---------------------+
4 rows in set (0.00 sec)

Let us see the query to fetch rows added in the last hour −

mysql> select *from LastHourRecords
-> where Login <=Date_sub(now(),interval 1 hour);

Output

+------+-------+---------------------+
| Id   | Name  | Login               |
+------+-------+---------------------+
| 1    | John  | 2018-12-19 10:00:00 |
| 2    | Carol | 2018-12-19 10:10:00 |
| 3    | Sam   | 2018-12-19 10:05:00 |
+------+-------+---------------------+
3 rows in set (0.00 sec)