About Geoff Expertise I specialise in database analysis and design, SQL and database queries using QBE and VBA. In my work, I use MS Access together with MS SQL Server as ETL (Extraction - Transformation - Loading) tools for migrating data between business ERP systems and data stores. My forte is building bespoke functions and applications.
See my
website for example apps and downloads
Experience I am a chartered engineer with 30 years of engineering and business experience, member of the BCS and have been working specifically in database applications, including SQL Server (v7/8/2000) for the last 9 or so years. I previously taught a course in Database Analysis and Design, but am now a freelance consultant and systems analyst.
Commercial database design and development work undertaken.
Question I have an Access 97 database that has gotten too large. I split it into multiple databases, link them, and use a union query so I can search across all databases at once. This has worked fine for 11 (1997, 1998, 1999, 2000, 2001, 2002, 2003a, 2003b, 2004a, 2004b, 2004c) databases. However, when I add a 12th (2005), it won't show up in the query. No errors - the data just isn't there. When I modify my Union statements to add ALL, I get double 2003b, no 2005. There is no duplicate data in these two tables. If I drop 2003b from my query, 2005 shows up. Do you have any idea what might be going on?
Answer Hi Patricia,
MS Access does have an overall memory limit - Access 97 is 1GB (Access 2K - 2GB), so it may well be this, that is causing the problem. There are also other limits, like the number of columns etc etc - best check all the specification limits - see onboard help - search for 'specification'.
