How to query a list in sharepoint

SELECT dbo.UserData.tp_ID,
dbo.UserData.tp_ListId,
dbo.UserData.tp_Author,
dbo.UserData.nvarchar1,
dbo.UserData.nvarchar2,
dbo.UserData.nvarchar3,
dbo.UserData.nvarchar4,
dbo.UserData.nvarchar5,
dbo.UserData.nvarchar6,
dbo.UserData.nvarchar7,
dbo.UserData.nvarchar8,
dbo.UserData.nvarchar9 ,
dbo.UserData.nvarchar10,
dbo.UserData.nvarchar11,
dbo.UserData.nvarchar12,
dbo.UserData.* –dont forget to modify this to snatch only the columns you need
FROM dbo.Lists
INNER JOIN
dbo.UserData ON dbo.Lists.tp_ID = dbo.UserData.tp_ListId
WHERE
(dbo.UserData.tp_ListId = ‘{B44327F5-95E9-4504-A3BF-1E6751C452D6}’)

–optional WHERE clause, this pulls data for ONE list