Calculated dates are useful for range testing : DATE_SUB « Date Time « SQL / MySQL

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

Calculated dates are useful for range testing

     
mysql>
mysql> CREATE TABLE date_val
    -> (
    ->  d       DATE
    -> );
Query OK, 0 rows affected (0.00 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 FROM date_val WHERE d >= DATE_SUB(CURDATE( ),INTERVAL 6 YEAR);
Empty set (0.00 sec)

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

   
    
    
    
    
  

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