A.SELECT Product Name AS’產品的名稱’,Unit Price AS’單價’FROM Products B.SELECT Product Name=產品的名稱,Unit Price=單價FROM Products C.SELECT Product Name=“產品的名稱”,Uni tPrice=“單價”FROM Products D.SELECT Product Name’產品的名稱’,Unit Price’單價’FROM Products
A.SELECT productname,price from products order by price ASC B.SELECT productname,price from products order by price DESC C.SELECT productname,price from products order by price D.SELECT productname and price from products order by price DESC
A.select * from table_name where 1<=2 B.truncate table table_name C.delete from table_name where null=null D.alter table table_name add column idd int