Stuck with Trigger on insert and Update - sql

Question

Thank you for looking on this question. I am using MSSQL Server Express.
I am trying to write a trigger which will update client's Eligibility based on their age and their income. I wrote the part with ages, but I am completely stuck with Eligibility part. I have statement which can select Clients who are not eligible based on their income, periodicity(month/year), household size
Select ClientID,c.HshldSize,c.MonthlyYearly,c.AnnualHshldIncome,i.SeniorMo,
StatusID,i.HshldSize
from Clients c
join IncomeEligibility i on c.HshldSize = i.HshldSize
where c.HshldSize= i.HshldSize and c.AnnualHshldIncome >= i.SeniorMo
and StatusID in (1,2)
and c.CategCode = 'SR' and MonthlyYearly ='month'
This select show all clients who not eligible
Example of respond
ClientID HshldSize MonthlyYearly AnnualHshldIncome SeniorMo StatusID HshldSize
28 1 month 1095 977 2 1
51 1 month 1253 977 1 1
63 1 month 1300 977 1 1
73 1 month 1200 977 1 1
96 1 month 1300 977 1 1
101 1 month 1255 977 1 1
160 2 month 1800 1513 1 2
IncomeEligibility Looks like this
HshldSize AKGuidline WomanChildYr WomanChildMo SeniorYr SeniorMo PFDYr PFDMo
1 9020 16687 1391 11726 977 878 73
2 13970 25845 2154 18161 1513 1756 146
3 18920 35002 2917 24596 2050 2634 219
4 23870 44160 3680 31031 2586 3512 292
5 28820 53317 4443 37466 3122 4390 365
6 33770 62475 5206 43901 3658 5268 439
7 38720 71632 5969 50336 4195 6146 512
8 43670 80790 6733 56771 4731 7024 585
9 48620 89947 7496 63206 5267 7902 658
10 53570 99105 8259 69641 5803 8780 731
11 58520 108262 9022 76076 6340 9658 804
12 63470 117420 9785 82511 6876 10536 878
13 68420 126577 10548 88946 7412 11414 951
14 73370 135735 11311 95381 7948 12292 1024
15 78320 144892 12074 101816 8485 13170 1097
16 83270 154050 12838 108251 9021 14048 1170
17 88220 163207 13601 114686 9557 14926 1243
18 93170 172365 14364 121121 10093 15804 1317
19 98120 181522 15127 127556 10630 16682 1390
20 103070 190680 15890 133991 11166 17560 1463
Trigger should set StatusID =5 on the clientrow if they are not eligible .
So far I have this trigger
create trigger tr_EligebilityCheck
on dbo.Clients
FOR INSERT,UPDATE
as
/*Check if Senior not eligible by age*/
If (select CategCode from inserted )='SR'
declare
#DOB date
SET #DOB = (select dob from inserted)
if DATEDIFF(YEAR,#DOB,GETDATE())<60
BEGIN
Update Clients
set StatusID = 5
From Clients c, inserted i
where c.CategCode = 'SR' and i.ClientID = C.ClientID
END
/*Check if Children eligebel by age*/
If (select CategCode from inserted )='CH'
declare
#DOBCH date
SET #DOBCH = (select dob from inserted)
if DATEDIFF(YEAR,#DOBCH,GETDATE()) >=6
BEGIN
Update Clients
set StatusID = 5
From Clients c, inserted i
where c.CategCode ='CH' and i.ClientID = C.ClientID
END
but have no idea how to add checking by Income, Please help if you have an idea how to do this. Also looks like my Trigger doesnot work throwing error when I am rtying insert new reccourd
Msg 512, Level 16, State 1, Procedure tr_EligebilityCheck, Line 6
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
Thank you!

Answer 1

You have the select statement prepared if that's the only way of identifying who's not eligible. So you just need to update the ones that fall into that criteria. Do it with a subquery (I did not SQLFiddle). You can put the update in whatever position it needs to be in the trigger.
UPDATE Clients
SET
theColName = 'value'
WHERE
ClientID IN (Select ClientID
from Clients c
join IncomeEligibility i
on c.HshldSize = i.HshldSize
where c.HshldSize= i.HshldSize
and c.AnnualHshldIncome >= i.SeniorMo
and StatusID in (1,2)
and c.CategCode = 'SR'
and MonthlyYearly ='month')
The error is about this line If (select CategCode from inserted )='SR' the select CategCode query is returning multiple values so an equals sign is the wrong operator. Although I would put 'SR' in a variable but try this approach.
if #var IN (select CategCode from inserted)
The statement looks for the value IN a resultset, not to see if it's equals to multiple values. Look at your query results and see if it's returning multiple CategCodes, that's what the error is saying.