logindani
asked on
Microsoft Access 1000 backward compatibility for SQL expressions
Hi!
I have an Access 97 database with several queries that don't run on Access 2000. An example query is:
SELECT Features.*, Subsystems.SubsystemName, SiteSubsystems.[Instance Number]
FROM (Features LEFT JOIN Subsystems ON Features.PrimarySubsystemI D=Subsyste ms.Subsyst emID) LEFT JOIN SiteSubsystems ON Features.PrimarySubsystemI D=SiteSubs ystems.Sub systemID
AND SiteSubsystems.[Sequential Index]=1
ORDER BY FeatureName;
When running it on Access 2000 I get the following error:
Microsoft Access can't represent the join expression
Features.PrimarySubsystemI D=SiteSubs ystems.Sub systemID
AND SiteSubsystems.[Sequential Index]=1
The query result is as if the join expressin is entirely
ignores the join expression. Needless to say it works fine on Access 97.
I run this query in my VB application via ADO 2.5 and the MDB is of version 97. There I don't get any error message, however the query result is wrong like I described.
Any ideas ?
What components does ADO use for Jet databases ? Maybe I need to replace this component with an older version ?
please help
thanks,
Dani
What component does ADO use
I have an Access 97 database with several queries that don't run on Access 2000. An example query is:
SELECT Features.*, Subsystems.SubsystemName, SiteSubsystems.[Instance Number]
FROM (Features LEFT JOIN Subsystems ON Features.PrimarySubsystemI
AND SiteSubsystems.[Sequential
ORDER BY FeatureName;
When running it on Access 2000 I get the following error:
Microsoft Access can't represent the join expression
Features.PrimarySubsystemI
AND SiteSubsystems.[Sequential
The query result is as if the join expressin is entirely
ignores the join expression. Needless to say it works fine on Access 97.
I run this query in my VB application via ADO 2.5 and the MDB is of version 97. There I don't get any error message, however the query result is wrong like I described.
Any ideas ?
What components does ADO use for Jet databases ? Maybe I need to replace this component with an older version ?
please help
thanks,
Dani
What component does ADO use
maybe toss some parentheses around the left join? such as:
SELECT Features.*, Subsystems.SubsystemName, SiteSubsystems.[Instance Number]
FROM (Features LEFT JOIN Subsystems ON Features.PrimarySubsystemI D=Subsyste ms.Subsyst emID) LEFT JOIN
SiteSubsystems ON ( Features.PrimarySubsystemI D=SiteSubs ystems.Sub systemID
AND SiteSubsystems.[Sequential Index]=1 )
ORDER BY FeatureName;
it seems that access 2000 syntax isn't quite the same as 97. i ran into this issue when dealing with ANSI sql statements and the effective "order" of parentheses. it was a real pain.
what you could do, along the lines that ornicar has mentioned, is simply rebuild the query. it doesn't look horribly difficult to redo, but it's a real pain i'm sure to have to redo all your queries.
good luck
dovholuk
SELECT Features.*, Subsystems.SubsystemName, SiteSubsystems.[Instance Number]
FROM (Features LEFT JOIN Subsystems ON Features.PrimarySubsystemI
SiteSubsystems ON ( Features.PrimarySubsystemI
AND SiteSubsystems.[Sequential
ORDER BY FeatureName;
it seems that access 2000 syntax isn't quite the same as 97. i ran into this issue when dealing with ANSI sql statements and the effective "order" of parentheses. it was a real pain.
what you could do, along the lines that ornicar has mentioned, is simply rebuild the query. it doesn't look horribly difficult to redo, but it's a real pain i'm sure to have to redo all your queries.
good luck
dovholuk
Well, I didn't mean rebuild them from scratch: Just copy the SQL from the old query and paste it in a new query does the trick. Strange, but this is what I experienced.
ornicar,
nothing strange about that
afterall, it is a microsoft product... :-)
cheers
Ricky
nothing strange about that
afterall, it is a microsoft product... :-)
cheers
Ricky
a Microstrange product... :-)
Man, this means you have to test all your queries :-(
Man, this means you have to test all your queries :-(
ASKER
It was a syntax problem in the query:
SiteSubsystems ON ( Features.PrimarySubsystemI D=SiteSubs ystems.Sub systemID
AND SiteSubsystems.[Sequential Index]=1 )
ORDER BY FeatureName;
should have been:
Features.PrimarySubsystemI D=SiteSubs ystems.Sub systemID
WHERE SiteSubsystems.[Sequential Index]=1 )
ORDER BY FeatureName;
for some reason on 97 it worked fine !!!?!!
SiteSubsystems ON ( Features.PrimarySubsystemI
AND SiteSubsystems.[Sequential
ORDER BY FeatureName;
should have been:
Features.PrimarySubsystemI
WHERE SiteSubsystems.[Sequential
ORDER BY FeatureName;
for some reason on 97 it worked fine !!!?!!
ASKER
It was a syntax problem in the query:
SiteSubsystems ON ( Features.PrimarySubsystemI D=SiteSubs ystems.Sub systemID
AND SiteSubsystems.[Sequential Index]=1 )
ORDER BY FeatureName;
should have been:
Features.PrimarySubsystemI D=SiteSubs ystems.Sub systemID
WHERE SiteSubsystems.[Sequential Index]=1 )
ORDER BY FeatureName;
for some reason on 97 it worked fine !!!?!!
SiteSubsystems ON ( Features.PrimarySubsystemI
AND SiteSubsystems.[Sequential
ORDER BY FeatureName;
should have been:
Features.PrimarySubsystemI
WHERE SiteSubsystems.[Sequential
ORDER BY FeatureName;
for some reason on 97 it worked fine !!!?!!
Be careful and compare the two queries in design view: In the original one, you have LEFT JOIN, and you don't have with the new syntax.
This means that in certain occasions, the two queries don't give the same result!
To set an outer join, double-click the relation line between the two tables and choose option 2 or 3. See the small arrow?
This means that in certain occasions, the two queries don't give the same result!
To set an outer join, double-click the relation line between the two tables and choose option 2 or 3. See the small arrow?
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for logindani
No comment has been added for the last two months.
So it's time to clean up this TA.
I will leave a recommendation in Community Support that this question is:
- PAQ'd and pts removed
Please leave any comments here within the
next seven days.
PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER !
Nic;o)
No comment has been added for the last two months.
So it's time to clean up this TA.
I will leave a recommendation in Community Support that this question is:
- PAQ'd and pts removed
Please leave any comments here within the
next seven days.
PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER !
Nic;o)
ASKER CERTIFIED SOLUTION
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Also make sure the tables Features ans SiteSubsystems exists and are reachable.