MySql Data Table, MySQL

Language: Layout:

DROP TABLE IF EXISTS DATA;

CREATE TABLE IF NOT EXISTS DATA(sku varchar(100), quantity int); 
INSERT INTO DATA(sku, quantity) VALUES
('ABC'       ,    55  );   
INSERT INTO DATA(sku, quantity) VALUES
('ABC_DE005' ,    1   );
INSERT INTO DATA(sku, quantity) VALUES
('ABC_DE006' ,    1   );
INSERT INTO DATA(sku, quantity) VALUES
('ABC_DE007' ,    1   );
INSERT INTO DATA(sku, quantity) VALUES
('ABC_DE008' ,    1   );
INSERT INTO DATA(sku, quantity) VALUES
('DEF'       ,    30  ); 
INSERT INTO DATA(sku, quantity) VALUES
('DEF_DE56'  ,    1   );
INSERT INTO DATA(sku, quantity) VALUES
('DEF_DE57'  ,    1   );
INSERT INTO DATA(sku, quantity) VALUES
('DEF_DE58'  ,    1   );
INSERT INTO DATA(sku, quantity) VALUES
('DEF_DE59'  ,    1   );
INSERT INTO DATA(sku, quantity) VALUES
('DEF_DE60'  ,    1   );
INSERT INTO DATA(sku, quantity) VALUES
('DEF_DE61'  ,    1   );

SELECT DATA.sku, DATA.quantity FROM DATA
INNER JOIN (SELECT * FROM DATA WHERE quantity > 20) DATA1 ON
DATA.sku = DATA1.sku OR DATA.sku LIKE CONCAT(DATA1.sku, '%');


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