SQL query - selecting the columns whose grand total is greater than 0 - sql

Question

Here is my SQL query:
DROP TABLE #tempi
CREATE TABLE #tempi
(
nav1 VARCHAR(50),
nav2 INT ,
nav3 INT ,
nav4 INT ,
nav5 INT
)
INSERT
INTO #tempi
SELECT COALESCE(CAST(machinename AS VARCHAR(28)), 'Grand Total:') AS machinename ,
SUM(CASE WHEN vfrm.job_id = '1001' THEN DATEDIFF(mi, 0, total_time) END) AS crate_small ,
SUM(CASE WHEN vfrm.job_id = '1002' THEN DATEDIFF(mi, 0, total_time) END) AS crate_medium ,
SUM(CASE WHEN vfrm.job_id = '1014' THEN DATEDIFF(mi, 0, total_time) END) AS front_air_deflector,
SUM(CASE WHEN vfrm.job_id = '9999' THEN DATEDIFF(mi, 0, total_time) END) AS no_schedule
FROM ven_fullreportmaster vfrm
INNER JOIN ven_descriptionmaster vdm
ON vdm.description_id = vfrm..description_id
INNER JOIN ven_machinemaster vm
ON vm.machine_id = vfrm..machine_id
WHERE vfrm.entry_date = CONVERT(VARCHAR, GETDATE()-7, 105)
--and vfrm.shift_id =1
AND vfrm.is_task_completed = 'Y'
GROUP BY machinename WITH ROLLUP
The output in tempi table:
nav1 nav2 nav3 nav4 nav5
abc 0:0 0:0 0:0 1:0
def 0:0 1:0 2:0 1:0
ghi 0:0 0:0 0:0 1:0
grand 0:0 1:0 2:0 3:0
total
I want to select the columns whose grand total is greater than 0. How to achieve it?

Answer 1

CREATE TABLE #tempi ( nav1 VARCHAR(50), nav2 INT, nav3 INT, nav4 INT, nav5 INT )
INSERT INTO #tempi VALUES('Grand Total:', 0.0, 1.0, 2.0, 3.0)
DECLARE #dynsql NVARCHAR(MAX)
SELECT #dynsql = ISNULL(#dynsql + ',','') + QUOTENAME(col) FROM #tempi
UNPIVOT(nav FOR col IN (nav2,nav3,nav4,nav5)) AS unpvt
WHERE nav1 = 'Grand Total:' AND nav>0
IF(##ROWCOUNT > 0)
BEGIN
SET #dynsql = 'SELECT ' + #dynsql + ' FROM #tempi'
EXEC(#dynsql)
END
DROP TABLE #tempi
Or if you can't use UNPIVOT...
DECLARE #dynsql NVARCHAR(MAX)
SELECT #dynsql = CASE WHEN nav2>0 THEN ',nav2' ELSE '' END +
CASE WHEN nav3>0 THEN ',nav3' ELSE '' END +
CASE WHEN nav4>0 THEN ',nav4' ELSE '' END +
CASE WHEN nav5>0 THEN ',nav5' ELSE '' END
FROM #tempi
WHERE nav1 = 'Grand Total:'
IF(LEN(#dynsql) > 0)
BEGIN
SET #dynsql = STUFF(#dynsql,1,1,'SELECT ') + ' FROM #tempi'
EXEC(#dynsql)
END