Non-ISO results from the CONCAT( ) operation can be converted into ISO format three different ways as follows:

       

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,
    -> CONCAT(YEAR(d),'-',MONTH(d),'-01') AS 'non-ISO',
    -> DATE_ADD(CONCAT(YEAR(d),'-',MONTH(d),'-01'),INTERVAL 0 DAY) AS method1,
    -> CONCAT(YEAR(d),'-',MONTH(d),'-01') + INTERVAL 0 DAY AS method2,
    -> FROM_DAYS(TO_DAYS(CONCAT(YEAR(d),'-',MONTH(d),'-01'))) AS method3
    -> FROM date_val;
+------------+------------+------------+------------+------------+
| d          | non-ISO    | method1    | method2    | method3    |
+------------+------------+------------+------------+------------+
| 1864-02-28 | 1864-2-01  | 1864-02-01 | 1864-02-01 | 1864-02-01 |
| 1900-01-15 | 1900-1-01  | 1900-01-01 | 1900-01-01 | 1900-01-01 |
| 1987-03-05 | 1987-3-01  | 1987-03-01 | 1987-03-01 | 1987-03-01 |
| 1999-12-31 | 1999-12-01 | 1999-12-01 | 1999-12-01 | 1999-12-01 |
| 2000-06-04 | 2000-6-01  | 2000-06-01 | 2000-06-01 | 2000-06-01 |
+------------+------------+------------+------------+------------+
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

1.	CONCAT(, [{, }...])
2.	Use the CONCAT() and LEFT() functions to create registration codes for the employees.
3.	Manipulate retrieved data from the Employees table.
4.	Combining a Date and a Time into a Date-and-Time Value
5.	Canonizing Not-Quite-ISO Date Strings
6.	Add the setting NO_ZERO_IN_DATE to the SQL_MODE system variable.
7.	To combine strings rather than pull them apart, use the CONCAT( ) function.
8.	Concatenating Character Strings
9.	Concatenation can be useful for modifying column values "in place."
10.	Generate Unique Sequential Numbers
11.	Use Concat to create Initial for the name

Non-ISO results from the CONCAT( ) operation can be converted into ISO format three different ways as follows: : CONCAT « String « SQL / MySQL

Related examples in the same category