问题
I am currently working on an SQL query for Access 97. Given are the following tables (simplified for demonstration purposes), each of which are located in separate mdb files:
Table1 in C:\db\db1.mdb:
PartyId (PK) Name
------------ --------
1 A
2 B
3 C
Table2 in C:\db\db2.mdb:
PartyId (PK) Date (PK) Value
------------ --------- -----
1 6/30/2014 4
1 7/1/2014 8
2 5/3/2014 3
3 5/5/2014 5
3 5/3/2014 1
3 5/2/2014 2
Here I would like to look for the most recent value of each party, based on a defined date. So let's say, I'd label 7/5/2014 as the target date, then my query should return the following:
PartyId Name Date Value
------- ---- -------- -----
1 A 7/1/2014 8
2 B 5/3/2014 3
3 C 5/5/2014 5
I have created the following query in the C:\db\db1.mdb database:
SELECT T.TPartyId, Name, T.TDate, T.TValue
FROM Table1 INNER JOIN [
SELECT Table2.PartyId AS TPartyId, MAX(Table2.Date) AS TDate, FIRST(Value) AS TValue
FROM Table2 IN 'C:\db\db2.mdb'
WHERE Table2.Date <= #7/5/2014#
GROUP BY Table2.PartyId]. AS T
ON (Table1.PartyId = T.TPartyId);
The problem is that Table2 is actually located in a password protected database file. Therefore, I have tried to modify the query, as described in http://support.microsoft.com/kb/113701 , to the following:
SELECT T.TPartyId, Name, T.TDate, T.TValue
FROM Table1 INNER JOIN [
SELECT Table2.PartyId AS TPartyId, MAX(Table2.Date) AS TDate, FIRST(Value) AS TValue
FROM [;database=C:\db\db2.mdb;PWD=mypwd].Table2
WHERE Table2.Date <= #7/5/2014#
GROUP BY Table2.PartyId]. AS T
ON (Table1.PartyId = T.TPartyId);
However, this always results in a syntax error. I suspect that the follow up brackets found in the
INNER JOIN [ … [;database= … ] … ]
statement are the cause of the failure. Unfortunately Access 97 always requires aliases to be enclosed in square brackets, followed by a period, whereas Access 2000 and higher don't have this limitation. Is there any way this query can be accomplished with Access 97 nonetheless? Thanks.
回答1:
Finally, after countless trial & error sessions, I've found a solution. This line seems work and also avoids placing two opening square brackets after each other:
FROM Table2 IN '' ';database=C:\db\db2.mdb;PWD=mypwd'
It's a shame that this isn't documented somewhere in a proper manner.
回答2:
Create Qry1 ="SELECT Table2.PartyId AS TPartyId,
MAX(Table2.Date) AS TDate, FIRST(Value) AS TValue
FROM [;database=C:\db\db2.mdb;PWD=mypwd].Table2
WHERE Table2.Date <= #7/5/2014#
GROUP BY Table2.PartyId "
SELECT T.TPartyId, Name, T.TDate, T.TValue
FROM Table1 INNER JOIN Qry1
ON (Table1.PartyId = Qry1.TPartyId);
来源：https://stackoverflow.com/questions/24587061/accessing-another-password-protected-database-in-an-sql-query-in-access-97