CREATE TABLE inventory (manufacturer VARCHAR,sku VARCHAR,level INTEGER);
INSERT INTO inventory (manufacturer,sku,level) VALUES ('XMLi','100',1000);
INSERT INTO inventory (manufacturer,sku,level) VALUES ('XMLi','200',-500);
INSERT INTO inventory (manufacturer,sku,level) VALUES ('Playfield','101',30);
INSERT INTO inventory (manufacturer,sku,level) VALUES ('Playfield','202',100);
