有如下表定义,()插入语句是正确的。CREATE TABLE student(studentidintnotnull,namechar(10)null,ageintnotnull,sexchar(1)notnull,dischar(10))
A. INSERT INTO studentVALUES(11,'abc',20, 'f')
B. INSERT INTO student(studentid,sex,age) VALUES (11,'f',20)
C. INSERT INTO student(studentid,sex,age) VALUES (11,20, 'f',NULL)
D. INSERT INTO student SELECT 11, 'ABC',20, 'F', 'test'
将商品名为“钢笔”的商品从“库存”表中删除,应使用()。
A. UPDATE 库存 SET 商品名=钢笔
B. DELETE FROM 库存 WHERE 商品名='钢笔'
C. DROP TABLE 库存 WHERE商品名='钢笔'
DROP FROM 库存 WHERE 商品名='钢笔'