SELECT SUBSTRING('MYSQL SUBSTRING', 7);
SELECT SUBSTRING('MySQL SUBSTRING',-10);
SELECT SUBSTRING('MYSQL SUBSTRING', 0);
SELECT SUBSTRING('MySQL SUBSTRING' FROM -10);
SELECT SUBSTRING('MySQL SUBSTRING',1,5);
SELECT SUBSTRING('MySQL SUBSTRING' FROM 1 FOR 5);
SELECT SUBSTRING('MySQL SUBSTRING',-15,5);
SELECT SUBSTRING('MySQL SUBSTRING' FROM -15 FOR 5);