摘要:
/*身份证号为’ 210210199901015555’的用户,今天借了一本图书编号为’ 20150301’的图书,完成下列业务需求: 更新读者信息表的余额。*/ select price from bookinfo where book_id = 20150301; select * from r 阅读全文
摘要:
select * from bookinfo; select store, store+1,store-1,store/2, store*2, store%2 from bookinfo; select * from readerinfo; -- 读者的身份证号,姓名,电话,余额select car 阅读全文