示例:在复杂查询中使用 STRING_AGG STRING_AGG可以与其他聚合函数和窗口函数结合使用,以实现更复杂的查询。 SELECTDepartment, STRING_AGG(EmployeeName,', ')WITHINGROUP(ORDERBYEmployeeName)ASEmployeeListFROMEmployeesGROUPBYDepartment; 假设Employees表中还有Department列,上述查询将按部门生成员工姓名列表,并按字母顺序...
I am using the STRING_AGG function within a CTE and it's working just fine (line 11 of the image below). However, I would like to apply an order by clause do the Agg function like i wrote in line 10. When I run que query in SQL Server it works just fine and I get ...
sql 聚合函数 STRING_AGG 高阶 SELECT fruit, STRING_AGG(fruit, " & ") OVER (ORDER BY LENGTH(fruit) ROWS BETWEEN 0 FOLLOWING AND 3 FOLLOWING) AS string_agg FROM UNNEST(["apple", "pear", "banana", "pear",'aa','cc','dfef']) AS fruit; 1. 2. 3. 4. SELECT fruit , STRING_AGG...
הערה The GROUP BY clause is required if the STRING_AGG function isn't the only item in the SELECT list.E. Generate list of emails per townsThe following query finds the email addresses of employees and groups them by city:SQL העתק ...
SELECT STRING_AGG(DISTINCT fruit, " & ") AS string_agg FROM UNNEST(["apple", "pear", "banana", "pear"]) AS fruit; 1. 2. string_agg apple & pear & banana SELECT STRING_AGG(fruit, " & " ORDER BY LENGTH(fruit)) AS string_agg ...
【摘要】 SQL Server 2017 引入了一个非常有用的函数——STRING_AGG。这个函数允许我们将多个行的字符串值连接成一个单一的字符串,这是在处理字符串聚合任务时非常方便的功能。本文将详细介绍如何在 SQL Server 中使用 STRING_AGG,涵盖其语法、参数、实际应用场景和常见问题。 1. STRING_AGG 函数概述STRING_AGG ...
STRING_AGG适用于任何兼容级别。 备注 <order_clause>适用于数据库兼容性级别 110 及更高级别。 示例 本文中的 Transact-SQL 代码示例使用AdventureWorks2022或AdventureWorksDW2022示例数据库,可以从Microsoft SQL Server 示例和社区项目主页下载该数据库。 A. 生成以新行分隔的姓名列表 ...
使用新添加的STRING_AGG函数(在 SQL Server 2017 中),如以下查询所示,我可以获得下面的结果集。 SELECT ProjectID, STRING_AGG( newID.value, ',') WITHIN GROUP (ORDER BY newID.value) AS NewField FROM [dbo].[Data] WITH(NOLOCK) CROSS APPLY ...
TheGROUP BYclause is required if theSTRING_AGGfunction isn't the only item in theSELECTlist. E. Generate list of emails per towns The following query finds the email addresses of employees and groups them by city: SQL USEAdventureWorks2022; GOSELECTTOP10City, STRING_AGG(CONVERT(NVARCHAR(MAX)...
SQL USEAdventureWorks2022; GOSELECTSTRING_AGG(CONVERT(NVARCHAR(MAX), FirstName),CHAR(13))AScsvFROMPerson.Person; GO 結果集如下所示。 輸出 csv --- Syed Catherine Kim Kim Kim Hazem ... 在NULL資料格中找到的name值不會在結果中傳回。 注意 如果使用...