sql - 有人能在这个简单的查询中找到语法错​​误吗？

Question

请帮我解决这个错误。

SELECT StateProvince,STRING_AGG(AddressID, ',') WITHIN GROUP (ORDER BY AddressID)
FROM [SalesLT].[Address] GROUP BY StateProvince;

我找不到这个错误，但它说

'(' 附近的语法不正确。

Answer 1

将数据库从 SQL 2008R2 升级到 2017 后出现同样的问题。通过将 Compatability Level 设置为 110（或更高？）来修复

Answer 2

对于 SQL 服务器 2017

SELECT StateProvince,
       STRING_AGG(AddressID, ',') WITHIN GROUP (ORDER BY AddressID) AS AddressID
FROM [SalesLT].[Address] GROUP BY StateProvince;

演示

http://dbfiddle.uk/?rdbms=sqlserver_2017&fiddle=69e5f9e9c5f3cab62e4b2eb9fb678299

对于 SQL SERVER 低于 2017

SELECT
      StateProvince, 
      AddressID = STUFF((
          SELECT ',' + CAST(md.AddressID AS NVARCHAR)
          FROM [SalesLT].[Address] md
          WHERE m.StateProvince = md.StateProvince
          ORDER BY AddressID
          FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'), 1, 1, '')
FROM [SalesLT].[Address] m
Group by StateProvince

演示

http://dbfiddle.uk/?rdbms=sqlserver_2012&fiddle=a1722450c70c946e9b53ae23785f4919

Answer 3

我看不到与您收到的消息相关的错误。对于大数据，它会抱怨 8000 字节的限制。这在 MS SQL 2017、AdventureWorks 示例数据库（不是数据较少的精简版）下运行良好：

SELECT StateProvinceID,
       STRING_AGG(cast(AddressID as varchar(MAX)), ',') WITHIN GROUP (ORDER BY AddressID) as AdressIDS
FROM [Person].[Address] 
GROUP BY StateProvinceID;