SQL SubQuery Error - sql

Question

I would like to retrieve the data in the following sample.The following SQL will return two records.
SELECT -1 AS NUM
FROM TABLE
WHERE COMP_CODE = 'TEST'
AND (DETL_REMK = 'Rest Day'
OR SHFT_CODE = 'WK_PH')
AND RSRV_DATE_1 IS NOT NULL
AND RSRV_DATE_1 BETWEEN #TR_FR AND #TR_TO
AND EMPE_ID = 'TEST'
GROUP BY EMPE_ID,
RSRV_DATE_1
I would like to show the below.
ORG UNIT EMPE_ID FAM_NAME TMS_TYPE Qty
-----------------------------------------------------------------
'' '' '' Used -1
'' '' '' Used -1
So, I 'm trying to do like that the SQL statement. But I got the error
"Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression."
How to construct the right SQL. Please help me. Thanks in advance.
SELECT '' ORG_UNIT, '' EMPE_ID, '' FAM_NAME, 'Used' AS TMS_TYPE,
ISNULL(CAST(
(SELECT -1 AS NUM
FROM TABLE
WHERE COMP_CODE = 'TEST'
AND (DETL_REMK = 'Rest Day'
OR SHFT_CODE = 'WK_PH')
AND RSRV_DATE_1 IS NOT NULL
AND RSRV_DATE_1 BETWEEN #TR_FR AND #TR_TO
AND EMPE_ID = 'TEST'
GROUP BY EMPE_ID, RSRV_DATE_1)AS NVARCHAR(MAX)),0) QTY

Answer 1

If you're just hardcoding the values outside the subquery, you don't need a subquery to return the 2 rows, just do this:
SELECT '' ORG_UNIT, '' EMPE_ID, '' FAM_NAME, 'Used' AS TMS_TYPE, -1 AS QTY
FROM TABLE
WHERE COMP_CODE = 'TEST'
AND (DETL_REMK = 'Rest Day'
OR SHFT_CODE = 'WK_PH')
AND RSRV_DATE_1 IS NOT NULL
AND RSRV_DATE_1 BETWEEN #TR_FR AND #TR_TO
AND EMPE_ID = 'TEST'
GROUP BY EMPE_ID,
RSRV_DATE_1
The issue here is you're not referencing any columns from your table, just using it to produce an amount of rows. Please share the full issue and code, as I'm sure there is more to this that what you're asking.

Answer 2

You can try this one instead
SELECT '' ORG_UNIT, '' EMPE_ID, '' FAM_NAME, 'Used' AS TMS_TYPE, -1 as QTY
union all
SELECT '' ORG_UNIT, '' EMPE_ID, '' FAM_NAME, 'Used' AS TMS_TYPE, -1 as QTY

Answer 3

You would need to add Top 1 to your subquery, from the error you are getting, looks like the subquery is returning more than 1 row:
SELECT Top 1 -1 AS NUM
FROM TABLE
WHERE COMP_CODE = 'TEST'
AND (DETL_REMK = 'Rest Day',
OR SHFT_CODE = 'WK_PH')
AND RSRV_DATE_1 IS NOT NULL
AND RSRV_DATE_1 BETWEEN #TR_FR AND #TR_TO
AND EMPE_ID = 'TEST'
GROUP BY EMPE_ID, RSRV_DATE_1