The last day of the previous month is a special case for which the general expression can be simplified quite : DATE_SUB « Date Time « SQL / MySQL

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

The last day of the previous month is a special case for which the general expression can be simplified quite

      
a bit:
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> SELECT d,
    -> DATE_SUB(d,INTERVAL DAYOFMONTH(d) DAY)
    -> AS 'last of previous month'
    -> FROM date_val;
+------------+------------------------+
| d          | last of previous month |
+------------+------------------------+
| 1864-02-28 | 1864-01-31             |
| 1900-01-15 | 1899-12-31             |
| 1987-03-05 | 1987-02-28             |
| 1999-12-31 | 1999-11-30             |
| 2000-06-04 | 2000-05-31             |
+------------+------------------------+
5 rows in set (0.00 sec)

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

   
    
    
    
    
    
  

Related examples in the same category