A.CREATE TABLE AUTHORS ON Prpducts(name varchar(50),IDsmallint) B.ALTER DATABASE products ADD TABLE Authors(name varchar(50),IDsmallint) C.CREATE TABLE Products.Authors(name varchar(50),IDsmallint) D.Create TABLE Products.Authors(name,ID)
A.UPDATE商品表SET價格=價格+2; B.INSERT商品表SET價格=價格+2; C.SELECT*FROM商品表SET價格=價格+2;
A.數(shù)據(jù)庫的結(jié)構(gòu) B.數(shù)據(jù)庫的記錄數(shù)量 C.數(shù)據(jù)庫檢索啟示的進(jìn)度 D.數(shù)據(jù)庫操作的復(fù)雜性