排除基于多个变量的记录

Question

SQL noob here. I'm using MS Access to query a table of streetlight data to exclude lights of a certain size and only where the fixture type is a variant of "Cobra". Is anyone kind enough to give me some guidance on what I might be doing wrong?

I can produce the lights I need to be excluded with:

SELECT * 
FROM Lighting 
WHERE Lighting.TYPE_FIXTURE LIKE '*cobra*' 
AND Lighting.SIZ < '16'

Simple enough. I thought this would be easy to tweak a little bit to get it to exclude these instead of produce them.

SELECT * 
FROM Lighting
WHERE Lighting.TYPE_FIXTURE NOT IN ('*Cobra*') 
AND Lighting.SIZ NOT IN ('10', '15')

This code excludes the lights I need to be excluded, but also every other type of light that is 100 or 150w. For the life of me, I can't figure out how to exclude ONLY Cobra lights 150w or less.

Through extensive internet research, I tried using an IIF expression to produce a temporary column that would have a value of 0 or 1, depending on if it needed to be excluded or not,

SELECT *
    ,IIf(Lighting.TYPE_FIXTURE LIKE "*cobra*" AND Lighting.SIZ < 15, 0, 1) AS IncludeFlag
INTO #MyTempTable
FROM Lighting

SELECT *
FROM #MyTempTable
WHERE IncludeFlag = 1

but my only result is an error message that I don't know how to resolve. I've spent all day on this one query and I'm starting to pull my hair out!!

Answer 1

Try this...

SELECT * 
FROM Lighting 
WHERE (Lighting.TYPE_FIXTURE NOT LIKE '*cobra*' 
AND Lighting.SIZ < '16')

Answer 2

Converting from a TRUE and TRUE to a NOT(TRUE and TRUE) involves distributing the NOT inside the brackets and switch the AND to an OR.

The following should give you the results you want:

SELECT *
FROM Lighting
WHERE Lighting.TYPE_FIXTURE Not Like '*cobra*' OR Lighting.SIZ>='16';