Fecha de valor de inserción mysql
UPDATE personal set birthday = STR_TO_DATE('1-01-2012', '%d-%m-%Y') where birthday IS NULL;
Zwazel
UPDATE personal set birthday = STR_TO_DATE('1-01-2012', '%d-%m-%Y') where birthday IS NULL;INSERT INTO my_table (last_updated) VALUES(NOW());
INSERT INTO my_table (last_updated) VALUES(sysdate); -- Oracle
INSERT INTO my_table (last_updated) VALUES(getdate()); -- SQL Server