1. returning single ID
INSERT INTO YourTable (Column1, Column2, ...)
OUTPUT INSERTED.IDColumn VALUES (@Value1, @Value2, ...)
run the query using executeReader or executeScalar
2. returning multiple ID (integer) in a string with coma
DECLARE @GeneratedIDs AS NVARCHAR(MAX);
INSERT INTO YourTable (Column1, Column2, ...)
OUTPUT INSERTED.IDColumn INTO @GeneratedIDs
VALUES (@Value1, @Value2, ...);
SELECT STUFF((SELECT ',' + CAST(IDColumn AS NVARCHAR(MAX))
FROM @GeneratedIDs FOR XML PATH('')), 1, 1, '') AS ConcatenatedIDs;
run this query using executeReader or executeScaler