January 2012
Intermediate to advanced
296 pages
5h 4m
English
Content preview from Joe Celko's Trees and Hierarchies in SQL for Smarties, 2nd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 14. State Transition Graphs
Data validation in a database is much more complex than seeing if a string parameter really is an integer. A commercial world is full of complex rules for sequences of procedures, of fixed or variable life spans, warranties, commercial offers, and bids. All this requires considerable subtlety to prevent bad data getting in and, if it does, locating and fixing the problem.
Keywords: data validation, data definition language, state transition diagram, initial state, flow lines, termination states
Data validation in a database is much more complex than seeing if a string parameter really is an integer. A commercial world is full of complex rules for sequences of procedures, of fixed or variable life spans, warranties, ...
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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.
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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.