Question

SQL Server中有许多子句，例如SELECT，WHERE，GROUP BY，ORDER BY，HAVING

编写查询时这些子句的正确顺序是什么？

Answer 1

http://msdn.microsoft.com/en-us/library/ms189499.aspx

[ WITH <common_table_expression>]

SELECT select_list [ INTO new_table ]

[ FROM table_source ] [ WHERE search_condition ]

[ GROUP BY group_by_expression ]

[ HAVING search_condition ]

[ ORDER BY order_expression [ ASC | DESC ] ]

Answer 2

SELECT
Groupby
Having
OrderBy

或者

SELECT
WHERE
OrderBy

Answer 3

这只是一个非常通用的查询。您需要首先开始阅读SQL的基础知识。请先检查以下链接 -

http://www.sql-tutorial.net/

编写SQL查询时这些子句的正确顺序是什么？

3 个答案: