Finding First and Last Days of Months : DATE_SUB « Date Time « SQL / MySQL

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

Finding First and Last Days of Months

     
mysql>
mysql> CREATE TABLE date_val
    -> (
    ->  d       DATE
    -> );
Query OK, 0 rows affected (0.01 sec)

mysql>
mysql> INSERT INTO date_val (d) VALUES('1864-02-28');
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO date_val (d) VALUES('1900-01-15');
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO date_val (d) VALUES('1987-03-05');
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO date_val (d) VALUES('1999-12-31');
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO date_val (d) VALUES('2000-06-04');
Query OK, 1 row affected (0.00 sec)

mysql>
mysql>
mysql> SELECT d, DATE_SUB(d,INTERVAL DAYOFMONTH(d)-1 DAY) AS '1st of month' FROM date_val;
+------------+--------------+
| d          | 1st of month |
+------------+--------------+
| 1864-02-28 | 1864-02-01   |
| 1900-01-15 | 1900-01-01   |
| 1987-03-05 | 1987-03-01   |
| 1999-12-31 | 1999-12-01   |
| 2000-06-04 | 2000-06-01   |
+------------+--------------+
5 rows in set (0.00 sec)

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

   
    
    
    
    
  

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