MySQL query to select specific resources - php

Question

Scenario:
The school where I work at has already a system that handles resource reservation (racks with tv's, projectors, etc), however I was asked to make a quick-fix for today since the system has a problem, there's no way to make the resource only appear for a specific segment:
1-6th grade is a segment,
7-11th grade is a segment.
The system is made out of PHP and MySQL.
Problem:
Without creating a new table, I have to find a way to show a specific resource only to 1-3rd grade and another one only to 4-6th grade.
Here are the tables:
I added into the grade table a new column called UNIQUERESOURCESwhere I put a value of 1 to sections between first and third grade and a value of 2 to sections between fourth and sixth grade.
How can I show to grades from 1-3 grade ONLY those specific resources and from 4-6 grade ONLY the other specific resources?
Here is the current query:
SELECT DISTINCT r.RESOURCEID, r.RESOURCENAME, rl.RESOURCELOCATIONNAME FROM resource r
inner join resource_location rl
on r.RESOURCELOCATIONID = rl.RESOURCELOCATIONID
inner join grade g
on g.RESOURCELOCATIONID = r.RESOURCELOCATIONID
inner join users_intermediate ui
on g.GRADEID = ui.GRADEID
WHERE ui.USERID = '%s'
How can I fix this query to include the resources as follows:
Include RESOURCELOCATIONID = 5 where UNIQUERESOURCES = 1 if the user is in between GRADEID 1-12
Include RESOURCELOCATIONID = 6 where UNIQUERESOURCES = 2 if the user is in between GRADEID 13-24.
This is the part I can't figure out. Some help would be really appreciated!
EDIT:
Here are some pictures of the resources
Resources:
Grades:
Users Intermediate (emails are censored in this pic):
As you can see, what I'm trying to accomplish is also include the resources that have resourcelocationid = 5 or resourcelocationid = 6 if the user teaches in grades that go from 1-3 or 4-6

Answer 1

Have you tryed this way:
SELECT RESOURCEID, RESOURCENAME, RESOURCEDESCRIPTION,
T3.RESOURCELOCATIONNAME, T2.RESOURCESTATUSNAME,
T2.RESOURCESTATUSDESCRIPTION, T2.RESOURCESTATUSID
FROM resource T1
INNER JOIN resource_status T2 USING(RESOURCESTATUSID)
INNER JOIN resource_location T3 USING(RESOURCELOCATIONID)
INNER JOIN grade USING(RESOURCELOCATIONID)
WHERE T1.RESOURCELOCATIONID IN (
SELECT DISTINCT RESOURCELOCATIONID FROM grade G
INNER JOIN users_intermediate UI
ON G.GRADEID = UI.GRADEID
WHERE USERID = "%s"
)
AND (
T1.RESOURCESTATUSID = 1
OR (
T1.RESOURCELOCATIONID = 5
AND (
UNIQUERESOURCES = 1 AND GRADEID >= 1 AND GRADEID <= 12
)
)
OR (
T1.RESOURCELOCATIONID = 6
AND (
UNIQUERESOURCES = 2 AND GRADEID >= 13 AND GRADEID <= 24
)
)
)

Answer 2

Not seeing sample data and confirming true context of your data and expected output, I would like to mentally describe via transitive association.
User "A" is associated with class/grade 1,2 and 3.
Looking into the Grade table, you find User "A" has grade information pointing to Locations "LH", "LR" and "LX" (arbitrary as to not confuse a location with a grade of 1-3 OR 4-6 (or other as later needed)).
Since we know the qualified "Locations", User "A" has access to ANYTHING found within the "LH", "LR" and "LX" locations.
Now, because the ResourceLocationID is in both the Resource_Location and the Resource table, the Grade table can actually join to each directly as the resource location table is nothing more than a lookup to get a descriptive name of where it is. The multiple things IN the room are the resources.
So, the only thing my inner prequery "QualGroups" does, is get a list of the UniqueResources groups (either 1 or 2) a user has access to. The next level is to get all DISTINCT locations under that 1 or 2 status. Because IF a user is access for group 1 at location "LH" AND class group 2 at location "LH", you do not want duplicated resources for location "LH". I am getting the location name while I am at it. (result alias QualLocations)
Now, I can get the resources for those distinct qualified locations
SELECT
QualLocations.ResourceLocationID,
QualLocations.ResourceLocationName,
R.ResourceID,
R.ResourceName,
R.ResourceDescription,
R.ResourceStatusID
from
( SELECT distinct
RL.ResourceLocationID,
RL.ResourceLocationName
from
grade G2
JOIN ( select distinct
G.UniqueResources
from
users_intermediate UI
JOIN grade G
ON UI.GradeID = G.GradeID
where
UI.UserID = "%s" ) QualGroups
ON G2.UniqueResources = QualGroups.UniqueResources
JOIN Resource_Location RL
ON G2.ResourceLocationID = RL.ResourceLocationID )
as QualLocations
JOIN Resource R
ON QualLocations.ResourceLocationID = R.ResourceLocationID
Now, if you ONLY CARE about a very specific classification group, UPDATE the inner-most query joining the "Grade G" table to include the unique resource you are looking for... in this case either 1 or 2
JOIN grade G
ON UI.GradeID = G.GradeID
AND G.UniqueResource = 1 (or 2 if you only wanted 4th-6th grade)
Hope this helps you on your way.
Aside from posted question above, if you change your "UniqueResource" to have a numeric value of the specific GRADE it is vs the verbiage description of the grade name, the AND clause above could be simplified to something like
AND G.UniqueResource IN ( 1, 2, 3 ) // for only grades 1-3
AND G.UniqueResource BETWEEN 1 and 6 // ex: for grades 1-6
AND G.UniqueResource > 6 // for any grade above 6th grade