Read e-book online Accessible Access 2003 PDF

By Mark Whitehorn

Available Access 2003 assumes that you just commence with very little wisdom of entry or databases and takes you to the purpose the place you could create and use a multi-table database. beginning with the fundamental components of a databaase - tables, kinds, queries and reviews, the authors make it easier to create easy examples of every utilizing the entry wizards the place acceptable, and the way to hand-build them so you might in achieving greater than you could utilizing simply the wizards.  when you are pleased with making a uncomplicated database which shops its info in one desk, the authors movement directly to a number of tables - why you would like them, and the way they are often used to create relatively powerful multi-table databases. available Access 2003 is written in a hugely readable sort, with plenty of examples, tricks and strategies for construction tables, extracting information and producing reviews.

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If you want the records for anyone living in London whose name is Laura, the criteria in the City column would read ‘london’ and in the FirstName column, ‘laura’. Criteria in different columns are taken to be joined with an ‘and’: in English the query says ‘show me the records where the city field contains ‘london’ and where the first name field contains ‘laura’. 47 4 Queries – finding data ❛ The results of expressions containing ‘and’ and ‘or’ can sometimes cause confusion. If you use ‘or’ you will, as a general rule, get a larger answer set than if you use ‘and’.

Although these general rules apply most of the time, in certain Access applications you may not be able to undo any changes. So the bottom line is to be careful out there when you’re dealing with important data. It is well worth playing around with a table of test data to get a feel for what you can and can’t do before working with real data. ’ The advice given there can safely be ignored for this first table but is worth following for real databases that you build in the future. Records and fields revisited A record comprises all the data you collect for one person, urn or whatever.

Why would you want to do that? Well, for a start, any given form doesn’t have to show all the fields in a database. If you wanted to scan a table to find a contact’s fax number, you could use a form which showed just the people’s names and fax numbers. This would allow you to concentrate on the job without the distraction of the other fields. Another reason might be that in a business application, personnel staff could use a form showing all of an employee’s data except medical records and the medical officer’s form would show just the medical records.

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