2021年3月2日
LEFT JOIN vs. LEFT OUTER JOIN in SQL Server
摘要： LEFT JOIN vs. LEFT OUTER JOIN in SQL Server As per the documentation: FROM (Transact-SQL): <join_type> ::= [ { INNER | { { LEFT | RIGHT | FULL } [ OUT 阅读全文
posted @ 2021-03-02 16:39 ChuckLu 阅读(169) 评论(0) 推荐(0)
Why do I have more rows after LEFT JOIN?
摘要： How can a LEFT OUTER JOIN return more records than exist in the left table? To "get as many records returned as exist in the left table", you need to 阅读全文
posted @ 2021-03-02 16:18 ChuckLu 阅读(73) 评论(0) 推荐(0)