Stored procedure looping error - sql

Question

I'm new to stored procedures and I'm getting an error:
Subquery returned more than 1 value. This is not permitted when the subquery follows
E_R_Main is header table, E_R_Detail is detail table. Both tables are joined using R_ID.
My expected output :
Code:
DECLARE #LALA NVARCHAR(10);
DECLARE #LALA2 NVARCHAR(10);
CREATE TABLE #TEMP
(
EMP_NAME nvarchar(256),
Total_Pending nvarchar(256),
Reschedule_Task nvarchar(256),
New_Task nvarchar(256)
)
--select * from #TEMP
INSERT INTO #TEMP(EMP_NAME, Total_Pending)
SELECT DISTINCT(PIC), COUNT(PIC) AS COUNTTT
FROM E_R_DetailT A
INNER JOIN E_R_MainT b ON a.R_ID = b.R_ID
WHERE PIC IS NOT NULL
GROUP BY T_EMP_ID
SET #LALA = (SELECT COUNT(B.R_ID) AS TEXSST
FROM E_R_MainT A
INNER JOIN E_R_DetailT B ON A.R_ID = B.R_ID
WHERE (b.R_Y = '[Redo]' OR R_Y_N = '[r]')
AND (STAT = 'S_5' OR STAT = 'S_3')
GROUP BY T_EMP_ID )
SET #LALA2 = (SELECT DISTINCT(B.T_EMP_ID)
FROM E_R_MainT A
INNER JOIN E_R_DetailT B ON A.R_ID = B.R_ID
WHERE (b.R_Y = '[Redo]' OR R_Y_N = '[r]')
AND (STAT = 'S_5' OR STAT = 'S_3')
GROUP BY T_EMP_ID)
UPDATE #TEMP
SET Reschedule_Task = #LALA
WHERE #TEMP.EMP_NAME = #LALA2
--SELECT * FROM #TEMP
SELECT
B.Name, a.Total_Pending, New_Task,
CASE
WHEN Reschedule_Task IS NULL
THEN 0
ELSE Reschedule_Task
END AS User_Feedback
FROM
#TEMP A
INNER JOIN
UserInfo B ON A.EMP_NAME = B.EmployeeNo
DROP TABLE #TEMP

Answer 1

Your code seems way more complicated than needed to solve this problem. It looks like a JOIN with conditional aggregation:
select d.pic,
sum(case when m.status in ('S_1', 'S_3', 'S_4') then 1 else 0 end) as Pending,
sum(case when m.status = 'S_1' then 1 else 0 end) as New,
sum(case when m.status = 'S_3' then 1 else 0 end) as Reschedule,
sum(case when m.status = 'S_4' then 1 else 0 end) as Completed
from e_r_main m join
e_r_detail d
on m.r_id = d.r_id
group by d.pic;