June 2007
Intermediate to advanced
1224 pages
35h 32m
English
book
Office 2007 Bible
by John Walkenbach, Herb Tyson, Faithe Wempen, Cary N. Prague, Michael R. Groh, Peter G. Aitken, Michael R. Irwin, Gavin Powell, Lisa A. Bucki
Content preview from Office 2007 Bible
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Working with the Table/Query Pane
As Figure 36-20 shows, a join line connects tables in the Query Designer. The join line connects the primary key in one table to the foreign key in another table.
Cross-Ref
These lines were predrawn because you already set the relationships between the tables earlier in Chapter 34.
The join line
A join line represents the relationship between two tables in the Access database. In this example, a join line goes from tblSales to tblContacts, connecting ContactID in the tblContacts table to the Buyer field in tblSales. There are other join lines connecting the other tables in this query.
The join line is automatically created because relationships were set in the relationship builder. If Access already knows about the relationship, it adds the join line when the tables are added to a query.
If Referential Integrity is set on the relationship, Access displays a thicker line where the join line connects to the table in the Query Designer. This variation in line thickness tells you that Referential Integrity is set between the two tables. If a one-to-many relationship exists, the many-side table is indicated by an infinity symbol (∞).
Access will auto join to tables if the following conditions are met:
Both tables have fields with the same name.
The same-named fields are the same data type (text, numeric, and so on).
One of the fields is a primary key in its table.
Tip
Access 2007 automatically attempts to join the tables if a relationship exists. Access ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.