STRING_AGG SQL Server 2016 中的替换

Question

我想聚合单列值，中间有分隔符并带有一些前缀。下面是尝试过的有效代码。

SELECT concat('TNB/IAG/',STRING_AGG(WF_ValStr, '/')) AS Result
    FROM wfattrdata where wf_id=35262472 and  WF_AttrID in (28,29,30,31,33);

我可以在最新的 MSSql 版本中得到低于预期的结果。

TNB/IAG/1/2/3/4/5

如何替换上述查询以使其在 SQL Server 2016 中运行？

Answer 1

检查下面的 STUFF，XML 代码 -

SELECT DISTINCT CONCAT('TNB/IAG/',T1.results) AS EXPECTED_RESULT FROM
(
select REPLACE(STUFF(CAST((
                    SELECT   ' /' +CAST(c.WF_ValStr AS VARCHAR(MAX))
                    FROM (  
                            SELECT distinct WF_ValStr
                            FROM wfattrdata
                        ) c
                    FOR XML PATH(''), TYPE) AS VARCHAR(MAX)), 1, 2, ''),' ','') AS results
                    from wfattrdata t) T1;

STRING_AGG SQL Server 2016 中的替换

STRING_AGG replacement in SQL Server 2016

tsql

sql-server

string-aggregation

sql-server-2016