How to Add and Compare Results from Subqueries - mysql

Question

I have the following code written for a larger report that I have been working on. I have three columns resulting from subqueries: req_hrs, e_hrs, inprog_hrs. I need to add together the e_hrs and inprog_hrs, thus seeing whether that number is greater than or equal to req_hrs. If that is true, I need to return either an * or a null value.
Can someone please explain to me how I can add the two subquery results (e_hrs and inprog_hrs) together, and then compare that result to req_hrs thus returning said * or NVL? Code is below, Thank you:
SELECT
spriden_last_name lname,
spriden_first_name fname,
spriden_mi mi,
spriden_id id,
x.shrdgmr_majr_code_1 majr,
x.shrdgmr_grad_date grad_dt,
x.shrdgmr_degs_code degs,
DECODE(stvdegs_award_status_ind,'A','*',NULL) award_ind,
**DECODE(NVL(m.smbagen_req_credits_overall,0),0,
DECODE(NVL(sorcmjr_req_hours_ssdf,0),0,
DECODE(stvdegc_acat_code,'22',32,'23',64,'24',124,'42',42,999),
sorcmjr_req_hours_ssdf),m.smbagen_req_credits_overall) req_hrs,**
**TRUNC(shrlgpa_hours_earned,2) AS e_hrs,**
**(SELECT
NVL(SUM(sfrstcr_credit_hr),0)
FROM
sfrstcr
WHERE
sfrstcr_term_code = '&inprog_term'
AND sfrstcr_pidm = x.shrdgmr_pidm
AND sfrstcr_rsts_code IN ('RE','RW')
AND NOT EXISTS (
SELECT
'Y'
FROM
shrtckn,
shrtckg j
WHERE
shrtckn_pidm = sfrstcr_pidm
AND shrtckn_term_code = sfrstcr_term_code
AND shrtckn_crn = sfrstcr_crn
AND j.shrtckg_pidm = shrtckn_pidm
AND j.shrtckg_term_code = shrtckn_term_code
AND j.shrtckg_tckn_seq_no = shrtckn_seq_no
AND j.shrtckg_seq_no = (
SELECT
MAX(k.shrtckg_seq_no)
FROM
shrtckg k
WHERE
k.shrtckg_pidm = shrtckn_pidm
AND k.shrtckg_term_code = shrtckn_term_code
AND k.shrtckg_tckn_seq_no = shrtckn_seq_no))) AS inprog_hrs,**
ROUND(shrlgpa_gpa,2) gpa,
DECODE(SIGN(shrlgpa_gpa - 3.90),0,'S',1,'S',
DECODE(SIGN(shrlgpa_gpa - 3.75),0,'M',1,'M',
DECODE(SIGN(shrlgpa_gpa - 3.50),0,'C',1,'C',NULL))) latin,
(SELECT
m.shrasdl_astd_code_dl
FROM
shrasdl m
WHERE
m.shrasdl_term_code_effective = (
SELECT
MAX(n.shrasdl_term_code_effective)
FROM
shrasdl n)
AND m.shrasdl_min_gpa_term = (
SELECT
MAX(n.shrasdl_min_gpa_term)
FROM
shrasdl n
WHERE
n.shrasdl_term_code_effective = m.shrasdl_term_code_effective
AND shrlgpa_gpa >= n.shrasdl_min_gpa_term)) honors
FROM
shrdgmr x,
stvdegs,
stvdegc,
spriden,
sorcmjr,
smbagen m,
shrlgpa
WHERE
TO_CHAR(x.shrdgmr_grad_date,'MON-YY') IN ('&grad_dt1', NVL('&grad_dt2','XXX-
00'))
AND x.shrdgmr_seq_no = (
SELECT
MAX(z.shrdgmr_seq_no)
FROM
shrdgmr z
WHERE
z.shrdgmr_pidm = x.shrdgmr_pidm
AND z.shrdgmr_majr_code_1 = x.shrdgmr_majr_code_1
AND z.shrdgmr_grad_date IS NOT NULL)
AND stvdegs_code = x.shrdgmr_degs_code
AND stvdegc_code = x.shrdgmr_degc_code
AND spriden_pidm = x.shrdgmr_pidm
AND spriden_change_ind IS NULL
AND sorcmjr_cmjr_rule(+) = x.shrdgmr_cmjr_rule_1_1
AND REPLACE(m.smbagen_area(+),'-CORE','') = x.shrdgmr_majr_code_1
AND m.smbagen_active_ind(+) = 'Y'
AND m.smbagen_term_code_eff(+) <= x.shrdgmr_term_code_grad
AND ((m.smbagen_area IS NULL)
OR (m.smbagen_area IS NOT NULL
AND m.smbagen_term_code_eff = (
SELECT
MAX(n.smbagen_term_code_eff)
FROM
smbagen n
WHERE
REPLACE(n.smbagen_area,'-CORE','') = x.shrdgmr_majr_code_1
AND n.smbagen_active_ind = 'Y'
AND n.smbagen_term_code_eff <= x.shrdgmr_term_code_grad)))
AND shrlgpa_pidm(+) = x.shrdgmr_pidm
AND shrlgpa_levl_code(+) = x.shrdgmr_levl_code
AND shrlgpa_gpa_type_ind(+) = 'O'
ORDER BY
spriden_last_name,
spriden_first_name,
spriden_mi
;

Answer 1

Compare the sum of the union of the two sources with the required amount.
In simplified form:
select somekey, sum(hrs) worked_hrs, sum(req_hrs) required_hrs
from (
select
somekey,
e_hrs hrs
from e_hrs_table
where ...
union all -- the "all" is important to leave in!
select
somekey,
inprog_hrs
from inprog_hrs_table
where ...
) x
join req_hrs_table on req_hrs_table.somekey = x.somekey
where ... -- add req_hrs_table conditions here
group by somekey
You can add
having sum(hrs) < sum(req_hrs)
if you want only those rows that did not meet the quota.