Treating Dates or Times as Numbers : DATE « Date Time « SQL / MySQL






  1. SQL / MySQL
  2. Date Time
  3. DATE

Treating Dates or Times as Numbers

     
mysql>
mysql>
mysql> CREATE TABLE time_val
    -> (
    ->  t1      TIME,
    ->  t2      TIME
    -> );
Query OK, 0 rows affected (0.01 sec)

mysql>
mysql> INSERT INTO time_val (t1,t2) VALUES('15:00:00','15:00:00');
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO time_val (t1,t2) VALUES('05:01:30','02:30:20');
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO time_val (t1,t2) VALUES('12:30:20','17:30:45');
Query OK, 1 row affected (0.00 sec)

mysql>
mysql> SELECT * FROM time_val;
+----------+----------+
| t1       | t2       |
+----------+----------+
| 15:00:00 | 15:00:00 |
| 05:01:30 | 02:30:20 |
| 12:30:20 | 17:30:45 |
+----------+----------+
3 rows in set (0.00 sec)

mysql>
mysql>
mysql> SELECT t1,
    -> t1+0 AS 't1 as number',
    -> FLOOR(t1) AS 't1 as number',
    -> FLOOR(t1/10000) AS 'hour part'
    -> FROM time_val;
+----------+--------------+--------------+-----------+
| t1       | t1 as number | t1 as number | hour part |
+----------+--------------+--------------+-----------+
| 15:00:00 |       150000 |       150000 |        15 |
| 05:01:30 |        50130 |        50130 |         5 |
| 12:30:20 |       123020 |       123020 |        12 |
+----------+--------------+--------------+-----------+
3 rows in set (0.00 sec)

mysql>
mysql> drop table time_val;
Query OK, 0 rows affected (0.00 sec)








Related examples in the same category

1.Extract just the date: DATE()
2.Synthesizing Dates or Times Using Formatting Functions
3.Synthesizing Dates or Times Using Component-Extraction Functions
4.Date-Based Sorting
5.Date-Based Summaries
6.Add an incorrect date to a special table and show the result.