Mega Code Archive
Determining the Number of Records by Day, Month, and Year
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mysql>
mysql> CREATE TABLE mytable (
-> id int(11) NOT NULL default '0',
-> choice tinyint(4) NOT NULL default '0',
-> ts timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP,
-> PRIMARY KEY (id)
-> );
Query OK, 0 rows affected (0.01 sec)
mysql>
mysql> INSERT INTO mytable VALUES (1,4,'2003-01-14 15:46:18'),
-> (2,1,'2003-01-14 15:49:44'),
-> (3,4,'2003-01-14 15:49:50'),
-> (4,4,'2003-01-14 15:49:53'),
-> (5,4,'2003-01-14 15:49:54'),
-> (6,2,'2003-01-14 15:49:58');
Query OK, 6 rows affected (0.00 sec)
Records: 6 Duplicates: 0 Warnings: 0
mysql>
mysql>
mysql> SELECT COUNT(*), MONTH(ts) AS m
-> FROM mytable
-> WHERE YEAR(ts)=2002;
+----------+------+
| COUNT(*) | m |
+----------+------+
| 0 | NULL |
+----------+------+
1 row in set (0.00 sec)
mysql>
mysql> drop table mytable;
Query OK, 0 rows affected (0.00 sec)
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