NCRE题库

登录注册
首页题库练习题目详情
计算机基础与程序设计单选题中等

SQL 查询中，下列哪个操作会返回多个表的并集？

ASELECT * FROM table1 UNION SELECT * FROM table2
BSELECT * FROM table1 INTERSECT SELECT * FROM table2
CSELECT * FROM table1 MINUS SELECT * FROM table2
DSELECT * FROM table1 JOIN table2 ON ...
上一题下一题