Here is a handy script to list all the Shared Data Sources from the ReportServer Database.
WITH BasicData AS
(
SELECT CONVERT(VARBINARY(MAX),Content) AS Content,
[Catalog].Name,[Path],ConnectionString FROM [Catalog] INNER JOIN DataSource
ON [Catalog].ItemID=DataSource.ItemID
WHERE [Type]=5 -- Type=5, Filters Shared Data Sources
)
,DataWithXML AS
(
SELECT
Name, [Path], CONVERT(XML,Content) AS ContentXML
FROM BasicData
)
SELECT Name, [Path], ConnectionString.value('(text())[1]','nvarchar(max)') AS ConnectionString
FROM DataWithXML
CROSS APPLY DataWithXML.ContentXML.nodes('//*:ConnectString') AS ConnectionStrings(ConnectionString)
