You have to add inner join with Table1
SELECT DISTINCT Table1.CID,
Table2.Name, Table2.aID, Table2.bID,
Table3.SchemeName, Table2.cURL
FROM Table4
INNER JOIN Table1 ON ....
INNER JOIN Table5 ON Table5.eID = Table1.eID
INNER JOIN Table2 ON Table2.ID = Table1.CID
INNER JOIN [Table3] ON Table3.aID = Table2.aID AND Table3.bID = Table2.bID
WHERE Table5.ID=@ID AND Table2.cURL LIKE '%' + @URL + '%'
or use Table1
instead of Table4
SELECT DISTINCT Table1.CID,
Table2.Name, Table2.aID, Table2.bID,
Table3.SchemeName, Table2.cURL
FROM Table1
INNER JOIN Table1 ON ....
INNER JOIN Table5 ON Table5.eID = Table1.eID
INNER JOIN Table2 ON Table2.ID = Table1.CID
INNER JOIN [Table3] ON Table3.aID = Table2.aID AND Table3.bID = Table2.bID
WHERE Table5.ID=@ID AND Table2.cURL LIKE '%' + @URL + '%'