摘要： CreatetableInventory(Itemchar(10),specchar(10),spricedecimal)insertintoInventoryvalues('DVD','步步高',2000)insertintoInventoryvalues('PC','LG',3000)insertintoInventoryvalues('PC','TCL',2000)insertintoInventoryvalues('PC','三星',2000)--ROLLUP 阅读全文