MySql Distinct with multiple fields

I have 4 columns a, b c, d in my table (MySQL database) . I want to select the distinct values of ALL of these 4 columns in my table . More deeply my table is given bellow.. ``` a b c d -------------------------- 1 3 3 4 1 2 3 0 1 1 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 ``` In the above table (1,2,3,4) value are repeating 4 times(look the last 4 rows of my table). I want only the distinct one , ie i want to get the bellow table after mysql query.. ``` a b c d --------------- 1 3 3 4 1 2 3 0 1 1 3 4 1 2 3 4 ``` I think you guys got some idea . Im not familier with MySql .