Merging code from two SQL queries - mysql

Question

I am attempting to combine the contents of two separate (but very closely related) sql queries, but am finding it difficult to get something that doesn't return syntax errors.
The two queries that are currently working are
SELECT module.ModuleCode,
demonstrator.FK_Course,
slot.fk_ModuleCode,
programme.C_val,
Count(slotdemo.FK_Demonstrator) AS CountOfFK_Demonstrator
FROM programme
INNER JOIN (demonstrator
INNER JOIN (((module
INNER JOIN slot ON module.ModuleCode = slot.fk_ModuleCode))
INNER JOIN slotdemo ON slot.SlotNo = slotdemo.FK_SlotNo) ON demonstrator.StudentID = slotdemo.FK_Demonstrator) ON programme.COURSE = demonstrator.FK_Course
WHERE demonstrator.`undergraduate`=1
GROUP BY module.ModuleCode
and
SELECT week.Hour,
module.color,
module.moduleName,
module.num_ugdemos,
slot.fk_Room,
slot.fk_ModuleCode,
slottime.FK_Hour,
slottime.FK_SlotNo,
programme.C_val,
Count(slotdemo.FK_Demonstrator) AS CountOfFK_Demonstrator
FROM week
INNER JOIN ((programme
INNER JOIN ((module
INNER JOIN slot ON module.ModuleCode = slot.fk_ModuleCode)
INNER JOIN slottime ON slot.SlotNo = slottime.FK_SlotNo) ON programme.COURSE = module.FK_Course)
LEFT JOIN slotdemo ON slot.SlotNo = slotdemo.FK_SlotNo) ON week.Hour = slottime.FK_Hour
GROUP BY week.Hour,
module.ModuleCode,
module.moduleName,
module.color,
slot.SlotNo,
slot.fk_Room,
slottime.FK_Hour,
programme.C_val HAVING((programme.C_val)<9);
my preliminary attempt at combining the two is
SELECT
week.Hour,
module.color,
module.moduleName,
module.num_ugdemos,
slot.fk_Room,
slot.fk_ModuleCode,
slottime.FK_Hour,
slottime.FK_SlotNo,
programme.C_val,
Count(slotdemo.FK_Demonstrator) AS CountOfFK_Demonstrator
FROM
week
INNER JOIN
(
(
programme
INNER JOIN
(
demonstrator
INNER JOIN
(
(
(
module
INNER JOIN
slot
ON module.ModuleCode = slot.fk_ModuleCode
)
)
INNER JOIN
slotdemo
ON slot.SlotNo = slotdemo.FK_SlotNo
)
ON demonstrator.StudentID = slotdemo.FK_Demonstrator
)
ON programme.COURSE = demonstrator.FK_Course
)
ON week.Hour = slottime.FK_Hour
WHERE
demonstrator.`undergraduate`=1
GROUP BY week.Hour,
module.moduleName,
module.color,
slot.SlotNo,
slot.fk_ModuleCode,
slot.fk_Room,
slottime.FK_Hour,
programme.C_val
The error message, for what's it's worth (which is not much) is:
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use
near 'ON week.Hour = slottime.FK_Hour WHERE
demonstrator.undergraduate=1 GROUP BY we' at line 17

Answer 1

I think you want to UNION Two datasets together. Just use the UNION operator:
(SELECT .... FROM t1)
UNION
(SELECT ... FROM t2)
Both selects should return the same columns, IF the names differ you can use AS to rename it.