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I want to use an expression in one of my table field to limit the value that can be entered in the field. Actually I want an expression which compares the data in the mentioned field with another field in some other table & should allow only value less than or equal to the compared field & shows...

Dear Dave Thanx for ur suggestion. But it will really be helpful if you elaborate a little. I have a database for around 3500 orders, 10 different client having around 1100 components. I've split every entity into different tables with one-to-many relationship with referential integrity...

I have a database with different tables linked with each other. I have to collect data periodically from an external source. Every time I collect data I have to update/append records in each & every table which is very time consuming & invite error in the process. Is there a way so that I can...