Download Joe Celko's SQL Programming Style (The Morgan Kaufmann by Joe Celko PDF

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By Joe Celko

Are you an SQL programmer that, like many, got here to SQL after studying and writing procedural or object-oriented code? Or have switched jobs to the place a distinct model of SQL is getting used, or even even been instructed to benefit SQL your self?

If even one resolution is definite, you then desire this ebook. A "Manual of Style" for the SQL programmer, this publication is a suite of heuristics and ideas, advice, and methods to help you increase SQL programming sort and skillability, and for formatting and writing moveable, readable, maintainable SQL code. in response to a long time of expertise consulting in SQL retailers, and accumulating questions and resolving his students' SQL kind concerns, Joe Celko may help develop into a good higher SQL programmer.

* assist you write average SQL with no an accessory or a dialect that's utilized in one other programming language or a selected taste of SQL, code that may be maintained and utilized by people.
* enable you supply your staff a coding average for inner use, to let programmers to take advantage of a constant sort.
* provide the psychological instruments to process a brand new challenge with SQL as your device, instead of one other programming language - person who another individual would possibly not understand!

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Additional info for Joe Celko's SQL Programming Style (The Morgan Kaufmann Series in Data Management Systems)

Sample text

The names “NAICS” and “naics_code” are clear to people who do business statistics, even though they look weird to the rest of us. If an industry standard is not right for your situation, then try to base your names on that standard. For example, if I am dealing only with automobiles made in Mexico, I could have a table named “VIN_Mexico” to show the restriction. Moving down the priority list, if I cannot find an industry standard, I would look for a collective or class name. I would never use a singular name.

Because this syntax is so proprietary, inconsistent with the standard model, and ambiguous, why does it exist? In the original Sybase product, the physical model made this “extension” relatively easy to implement, and there were no standards or a good understanding of the relational model back then. Programmers got used to it and then it was almost impossible to fix. When I lived in Indianapolis in the mid-1970s, my neighbor had graduated from General Motors private college and gone to work for the company.

The DBA can take advantage of this knowledge to optimize performance by placing: Infrequently updated nonvariable columns first Infrequently updated variable-length columns next Frequently updated columns last Columns that are frequently modified together next to each other Following this approach will cause DB2 to log the least amount of data most of the time. Because the log can be a significant bottleneck for performance, this approach is handy. You can always create the table and then create a view for use by developers that resequences the columns into the logical order if it is that important.

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