查询供应商及价格小于等于 2500 元且大于等于 1280 元的“电冰箱”的数量的SQL
语句为:
SELECT商品名,供应商名,价格,数量
FROM P
WHERE商品名= '电冰箱' AND (60) ;
将供应商号“12021”所供应的商品价格上涨3%的SQL语句为:
UPDATE P
(61)
WHERE 供应商号= '12021';
(60)
● The (74) scheme in a database system is responsible for the detection of failures and for the restoration of the database to a state that existed before the occurrence of the failure.
(74)
● Software (75) focuses on three attributes of the program: software architecture, data structure, and procedural detail.
(75)
● (73) statement can perform. a calculation and store the result in a variable so that it can be used later.
(73)
● (71) means that a program written for one computer system can be compiled and run on another system with little or no modification.
(71)
● Data items are added or deleted from the list only at the top of the (72) .
(72)
● 在http://www.test.com/main/index.htm中,index.htm是 (69) 。
(69)
● POP3服务默认的TCP 端口号是 (70) 。
(70)
● HTML语言中,可使用 (67) 标签将脚本插入HTML 文档。
(67)