Including rows with no values in SQL query output - sql

Question

Running the following query in my SQL SERVER 2016 database:
SELECT
u.idnumber,
gi.idnumber AS code,
gg.finalgrade AS grade
FROM
grades AS gg
INNER JOIN grade_items AS gi ON gg.itemid = gi.id
INNER JOIN users AS u ON gg.userid = u.id
WHERE gi.idnumber IN ('436','434','313','002','135')
AND (u.idnumber = 'JohnBrown-xyz123);
gives me this result:
-------------------------
idnumber code grade
-------------------------
John12558 313 96
John12558 135 83
How can I include a row for ALL the 5 gi.idnumber's, including the rows with no grade?
-------------------------
idnumber code grade
-------------------------
John12558 436
John12558 434
John12558 313 96
John12558 002
John12558 135 83
Database tables:
user
id PK
grade_items
id PK
grade_grades
grade_grades.itemid FK (grade_items)
grade_grades.userid FK (user)

Answer 1

You can use value construct like that :
select tt.idnumber,
t.idnumber AS code,
tt.grade
from (values ('436'), ('434'), ('313'), ('002'), ('135')) t (idnumber)
left join (select
u.idnumber,
gi.idnumber AS code,
gg.finalgrade AS grade
from grades AS gg
inner join grade_items AS gi ON gg.itemid = gi.id
inner join users AS u ON gg.userid = u.id
where u.idnumber = 'JohnBrown-xyz123') tt on left(tt.code, 3) = t.idnumber
If, idnumber has numeric type, then you don't need to use ' '.

Answer 2

You need cross join to see all you want:
select
u.idnumber,
gi.idnumber code,
ISNULL(gg.finalgrade, 0) grade
from users u
cross join grade_items gi
left outer join grades gg on gg.itemid = gi.id and gg.userid = u.id
where gi.idnumber in ('436','434','313','002','135')
and u.idnumber = 'JohnBrown-xyz123'
nulls in finalgrade cannot be replaced with 'N/A' because they are numbers, not strings, I replaced them with zero.

Answer 3

Assuming "no value" is NULL then just add an extra clause to your WHERE:
WHERE (LEFT(gi.idnumber, 3) IN ('436','434','313','002','135')
OR gi.idnumber IS NULL)
Edit: Apaprently, the above does not work, which implies that "no value" does not mean NULL. you could, instead, therefore try:
WHERE (LEFT(gi.idnumber, 3) IN ('436','434','313','002','135','')
If this doesn't work, please provide consumable sample data, which we can test against: Forum Etiquette: How to post data for a T-SQL Question