In addition to Weibo, there is also WeChat
Please pay attention
WeChat public account
Shulou
2025-04-02 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Database >
Share
Shulou(Shulou.com)06/01 Report--
Choose two.
Which two statements are true about the results of using the INTERSECT operator in compound queres?
A) Reversing the order of the intersected tables can sometimes affect the output.
B) Column names in each SELECT in the compound query can be dfferent.
C) INTERSECT returns rows common to both sides of the compound query.
D) The number of columns in each SELECT in the compound query can be dfferent.
E) INTERSECT ignores NULLs
Answer::BC
(parsing: intersect sorts the output by the value of the first column of the first query. Because the table is intersected, the query order of the table can be in no particular order; the names of the columns can be different, but the data types must match.)
Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.
Views: 0
*The comments in the above article only represent the author's personal views and do not represent the views and positions of this website. If you have more insights, please feel free to contribute and share.
Continue with the installation of the previous hadoop.First, install zookooper1. Decompress zookoope
"Every 5-10 years, there's a rare product, a really special, very unusual product that's the most un
© 2024 shulou.com SLNews company. All rights reserved.