Merging two tables with selection

[Bruce Stradling]

I would like to have two tables. One I call SystemPropertyTypeTable which
contains the defaults and the other UserPropertyTypeTable. Each has 3
fields. PropertyType, Description, Status.

The idea here is to allow a user to change his/her defaults or to add a new
Property Type without messing with the system default list.

I would like to Merge these two tables using the following logic.
The SystemPropertyTypeTable any records that have "ACTIVE" for the status.
The UserPropertyTypeTable all records.

Group by Name and remove any duplicates.
if the UserPropertyTypeTable has INACTIVE then Throw away the Active Record
from the SystemPropertyTypeTable and keep the INACTIVE record.

Here is my code so far.

SELECT T.PropertyType, T.Status
FROM [SELECT PropertyType,Status
FROM SystemPropertyTypeTable Where Status='ACTIVE'
UNION ALL
SELECT PropertyType,Status
FROM UserPropertyTypeTable]. AS T
GROUP BY T.PropertyType, T.Status
HAVING (((Count(*))=1));

here is the resultset
ShowAllRecordsMerged PropertyType Status
APARTMENT ACTIVE
APARTMENT INACTIVE
BUILDING ACTIVE
GARAGE ACTIVE
KOISK ACTIVE
MAINTENANCE SHOP ACTIVE
MAINTENANCE STORAGE AREA ACTIVE
OFFICE ACTIVE
PARKING SPACE ACTIVE
PARKING SPACE INACTIVE
SHOP ACTIVE
STORAGE AREA ACTIVE
So looking at this I would still like to remove any duplicates leaving the
INACTIVE ones which would be the first APARTMENT record and the first
PARKING SPACE record. Also it would be nice to add the description back into
this as well.

Any help anyone can be here would be wonderful.

Thanks in advance.

Bruce

[Erland Sommarskog]

Bruce Stradling (bs********@cox.net) writes:

I would like to Merge these two tables using the following logic.
The SystemPropertyTypeTable any records that have "ACTIVE" for the status.
The UserPropertyTypeTable all records.

Group by Name and remove any duplicates. if the UserPropertyTypeTable
has INACTIVE then Throw away the Active Record from the
SystemPropertyTypeTable and keep the INACTIVE record.

If I understand this correctly, you want:

SELECT U.PropertyType, U.Description, U.Status
FROM UserPropertyTable U
UNION ALL
SELECT S.PropertyType, S.Description, S.Status
FROM SystemPropertyType S
WHERE S.Status = 'ACTIVE'
AND NOT EXISTS (SELECT *
FROM UserPropertyTable U
WHERE S.Property = U.Property)
--
Erland Sommarskog, SQL Server MVP, es****@sommarskog.se

Books Online for SQL Server 2005 at
http://www.microsoft.com/technet/pro...ads/books.mspx
Books Online for SQL Server 2000 at
http://www.microsoft.com/sql/prodinf...ons/books.mspx

[Bruce Stradling]

Thanks ... that was exactly what I needed. Here is the final code:

SELECT U.PropertyType, U.Description, U.Status
FROM UserPropertyTypeTable U
UNION ALL SELECT S.PropertyType, S.Description, S.Status
FROM SystemPropertyTypeTable S
WHERE S.Status = 'ACTIVE'
AND NOT EXISTS (SELECT *
FROM UserPropertyTypeTable U
WHERE S.PropertyType = U.PropertyType)
ORDER BY PropertyType;

And then another that removed all inactive records:

SELECT U.PropertyType, U.Description, U.Status
FROM UserPropertyTypeTable U
WHERE U.Status = 'ACTIVE'
UNION ALL SELECT S.PropertyType, S.Description, S.Status
FROM SystemPropertyTypeTable S
WHERE S.Status = 'ACTIVE'
AND NOT EXISTS (SELECT *
FROM UserPropertyTypeTable U
WHERE S.PropertyType = U.PropertyType)
ORDER BY PropertyType;

"Erland Sommarskog" <es****@sommarskog.sewrote in message
news:Xn**********************@127.0.0.1...

Bruce Stradling (bs********@cox.net) writes:

I would like to Merge these two tables using the following logic.
The SystemPropertyTypeTable any records that have "ACTIVE" for the

status.

The UserPropertyTypeTable all records.

Group by Name and remove any duplicates. if the UserPropertyTypeTable
has INACTIVE then Throw away the Active Record from the
SystemPropertyTypeTable and keep the INACTIVE record.

If I understand this correctly, you want:

SELECT U.PropertyType, U.Description, U.Status
FROM UserPropertyTable U
UNION ALL
SELECT S.PropertyType, S.Description, S.Status
FROM SystemPropertyType S
WHERE S.Status = 'ACTIVE'
AND NOT EXISTS (SELECT *
FROM UserPropertyTable U
WHERE S.Property = U.Property)
--
Erland Sommarskog, SQL Server MVP, es****@sommarskog.se

Books Online for SQL Server 2005 at
http://www.microsoft.com/technet/pro...ads/books.mspx
Books Online for SQL Server 2000 at
http://www.microsoft.com/sql/prodinf...ons/books.mspx