How to get only column names from different tables as single table columns

Question

Hi All,
   I have one requirement in which we want only column names from different tables.
for example :
 I have three tables T1 ,T2, T3 having
  col1 clo2 clo3 -->  T1 , 
  col3 col5 ,clo6 --> T2 ,
  Clo6 col8 col9 --> T3
columns i want to get only all  Column names from all table as single Resultset not any data from that how can i get that empty resultset 
because this empty result i want to bind in datagridview(front end) as Empty resultset 
Please tell me anyways to do this
Niraj Sevalkar

Answer 1

If I understand you want an empty result set, just with metadata. SET FMTONLY do the trick:
SET FMTONLY ON
SELECT Col1, Col2, Col3, ....., Coln
FROM
T1 CROSS JOIN T2 CROSS JOIN T3
SET FMTONLY OFF
Another alternative is to include an imposible contition
SELECT Col1, Col2, Col3, ....., Coln
FROM
T1 CROSS JOIN T2 CROSS JOIN T3
WHERE 1 = 0
If you are using a SqlDataAdapter in your client application. You can use the FillSchema method. the select command may be any select statement that returns the columns you want. Under the covers FillSchema will call SET FMTONLY ON.
If you are using SqlCommand.ExecuteReader you can pass SchemaOnly to CommandBehavior argument. SET FMTONLY ON is called under the covers. Again the select command may be any select statement that returns the columns you want.
"No darás tropezón ni desatino que no te haga adelantar camino" Bernardo Balbuena