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Home -> Community -> Mailing Lists -> Oracle-L -> RE: MS Access as a front-end to Oracle DB
I have had some recent exposure to Access - people asking me to investigate why their query runs for so long. I can understand that if one table in the query is local then Access has to pretty much work locally, but I have been terribly surprised at how it approaches multi-table queries some time.
I've seen it work on a single table at a time and then pass a bind variable to the next table to simulate a join. The example I was looking at most recently turned one query into 80,000 queries as a result - just what production needs when it's busy already. My best guess is that Access see's foreign tables as individual foreign tables. Perhaps it doesn't worry about where the foreign tables come from and therefore treats them all as individual entities? Anyway, that's just a guess as to why Access would break a simple join into two queries.
"Goulet, Dick"
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Sent by: Subject: RE: MS Access as a front-end
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21/06/2003 08:04
Please respond to
ORACLE-L
Yes, you are misunderstanding it. A simple statement like your will result in only the data required being sent over the network. But if you add in a second table things change, especially if that table is a local access table.
Dick Goulet
Senior Oracle DBA
Oracle Certified 8i DBA
-----Original Message-----
Sent: Friday, June 20, 2003 5:45 PM
To: Multiple recipients of list ORACLE-L
Hi all:
I have been hearing from many people that MS Access is bad as a front-end tool because it tends to do data processing on the clien side instead of the DB side thus moving way too much data over the network. Assuming that this is correct, what is the mechanism of this? If I execute a simple query like:
select f1, f2 from t1
where f3='X';
is MS access going to copy the whole table t1 to my machine and only show the rows with f3 equal to 'X'? Am I misinderstanding it?
tia
Gene
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