MS SQL - 3 'OR's within one OR - sql

Question

I have a View I created using Microsoft Dynamics 2011 and I'm now looking to turn this into SQL code to use within Excel.
I have gotten everything else to work except the OR clauses (the query doesn't return all the results that I am expecting). I'm very new to SQl and any help will be really appreciated.
AND (Child.btb_childhealthlastlacmedical is NULL
OR Child.btb_childhealthlastlacmedical <= DATEADD(month, -12, GETDATE()))
AND (Child.btb_childhealthlastdentaldate is NULL
OR Child.btb_childhealthlastdentaldate <= DATEADD(month, -12, GETDATE()))
AND (Child.btb_childhealthlastopticiandate is NULL
OR Child.btb_childhealthlastopticiandate <= DATEADD(month, -24, GETDATE()))
Final Edit Solved By xQbert's solution below. Thank you so much!!

Answer 1

I think you're looking for something more like this. But you might possibly want and instead or or within the brackets. Not sure what you're looking for. But basically you need to separate statements with or instead of and
AND (Child.btb_childhealthlastlacmedical is NULL OR
Child.btb_childhealthlastlacmedical <= DATEADD(month, -12, GETDATE()))
OR
(Child.btb_childhealthlastdentaldate is NULL OR
Child.btb_childhealthlastdentaldate <= DATEADD(month, -12, GETDATE()))
OR
(Child.btb_childhealthlastopticiandate is NULL OR
Child.btb_childhealthlastopticiandate <= DATEADD(month, -24, GETDATE()))

Answer 2

This will return true if any field meets the criteria
AND ( COALESCE(Child.btb_childhealthlastlacmedical,
DATEADD(month, -12, GETDATE())) <= DATEADD(month, -12, GETDATE())
OR COALESCE(Child.btb_childhealthlastdentaldate ,
DATEADD(month, -12, GETDATE())) <= DATEADD(month, -12, GETDATE())
OR COALESCE(Child.btb_childhealthlastopticiandate ,
DATEADD(month, -12, GETDATE())) <= DATEADD(month, -24, GETDATE())
)
You also want to change your RIGHT outer join to just a JOIN (sometimes called an inner join) This is probably why you are getting more results than you expect.

Answer 3

Don't mix join notations use the ANSI 92 standard (INNER JOIN, OUTER JOIN) not the 89 (comma notation) your present join would exclude the records from the family table not in filtered contact.
--RIGHT OUTER JOINS mean that dbo.FilteredContactcontact is the table with all the records. And then records from dbo.filteredAccount that match those in child and then those in filteredBusinessUnit that match. As such the fil.name filter belongs on the join.
The filters on the child table belong on the right table. I'm really surprised no one else caught me on this...
SELECT Child.fullname AS Child
FROM dbo.FilteredBusinessUnit Fil
RIGHT JOIN dbo.FilteredAccount Family
ON Fil.businessunitid=Family.owningbusinessunit
RIGHT JOIN dbo.FilteredContact Child
ON Child.accountid=Family.accountid
WHERE (Child.btb_childhealthlastlacmedical is NULL
OR Child.btb_childhealthlastlacmedical <= DATEADD(month, -12, GETDATE())
OR Child.btb_childhealthlastdentaldate is NULL
OR Child.btb_childhealthlastdentaldate <= DATEADD(month, -12, GETDATE())
OR Child.btb_childhealthlastopticiandate is NULL
OR Child.btb_childhealthlastopticiandate <= DATEADD(month, -24, GETDATE()) )
AND Child.customertypecode = 1
AND Child.owningbusinessunit = 'North West'
Note when using outer joins, any limiting criteria on tables aside from the "all records table (FilteredContactin this case)" should be placed on the join, or the outer join is negated and behaves like an inner join.
I'm not sure why you have the null checks if its because some records are null or if you had the null check to keep the records from the outer join. If the latter then this way we don't need the null checks. If the first then we need to keep the null checks.