October 2002
Beginner
864 pages
18h 41m
English
Content preview from Sams Teach Yourself SQL in 21 Days, Fourth Edition
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Q&A
| Q1: | Why are so few functions defined in the ANSI standard and so many defined by the individual implementations? |
| A1: | ANSI standards are broad strokes and are not meant to drive companies into bankruptcy by forcing all implementations to have dozens of functions. On the other hand, when company X adds a statistical package to its SQL and it sells well, you can bet companies Y and Z will follow suit. |
| Q2: | I thought you said SQL was simple. Will I really use all of these functions? |
| A2: | The answer to this question is similar to the answer a trigonometry teacher might give to the question, “Will I ever need to know how to figure the area of an isosceles triangle in real life?” The answer, of course, depends on your profession. The same concept applies ... |
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