Execute queries stored in columns of a SQL Server table - sql-server

Question

I have a table with 2 columns QueryName and Query. I am trying the execute the queries stored in the Query column of the table.
I want to display anything that has more than record count of zero, we need to print to output with queryname and count. I am using the following cursor, I was able to display rowcount but anyone please suggest me how to display the QueryName:
DECLARE #Sql NVARCHAR(MAX);
DECLARE Cur CURSOR LOCAL FAST_FORWARD FOR
(SELECT Query
FROM VWLetterTYB )
OPEN Cur
FETCH NEXT FROM Cur INTO #Sql
WHILE (##FETCH_STATUS = 0)
BEGIN
--Exec sp_executesql #Sql
EXEC ('SELECT COUNT(*) AS Rowcounts FROM (' + #sql + ') AS t HAVING COUNT(*) > 0 ')
FETCH NEXT FROM Cur INTO #Sql
END
CLOSE Cur
DEALLOCATE Cur;

Answer 1

DECLARE #Sql NVARCHAR(MAX);
DECLARE Cur CURSOR LOCAL FAST_FORWARD FOR
(SELECT Query
FROM VWLetterTYB )
OPEN Cur
FETCH NEXT FROM Cur INTO #Sql
WHILE (##FETCH_STATUS = 0)
BEGIN
--Exec sp_executesql #Sql
EXEC ('SELECT [sql] = ''' + #Sql + ''', COUNT(*) AS Rowcounts FROM (' + #sql + ') AS t HAVING COUNT(*) > 0 ')
FETCH NEXT FROM Cur INTO #Sql
END
CLOSE Cur
DEALLOCATE Cur;

Answer 2

If I understand you correctly, you have two fields in the table but you only managed to get one using the cursor. In that case, the solution is easy, you can fetch more than one value with a cursor (each one to a different variable), then just put that value in the dynamic SELECT:
DECLARE #Sql NVARCHAR(MAX), #QueryName NVARCHAR(MAX);
DECLARE Cur CURSOR LOCAL FAST_FORWARD FOR
(SELECT Query, QueryName
FROM VWLetterTYB )
OPEN Cur
-- variables are filled in the order used in the SELECT (first column to first variable,
-- second column to second variable, etc.)
FETCH NEXT FROM Cur INTO #Sql, #QueryName
WHILE (##FETCH_STATUS = 0)
BEGIN
-- when using single quotes inside a string you have to double it
EXEC ('SELECT '''+ #QueryName+''' AS QueryName, COUNT(*) AS Rowcounts FROM (' + #sql + ') AS t HAVING COUNT(*) > 0 ')
FETCH NEXT FROM Cur INTO #Sql, #QueryName
END
CLOSE Cur
DEALLOCATE Cur;

Answer 3

I don't have an answer, but a further refinement of the question. The examples here are using the stored SQL as a standalone command. Can a snippet of SQL stored in a table's column be used as an item in a SELECT list?
I have a situation where I have a table of code/name lookup pairs. Most codes lead to a single name. But something logic needs to be applied to determine the name. I would like to have this seamless in my master SQL statement. I have to apply this logic from the same lookup table in many scripts. I don't want to have to embed complex logic in each script or maintain a convoluted stored procedure.