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Strategies & Market Trends : Gorilla and King Portfolio Candidates

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To: Thomas Mercer-Hursh who wrote (15054)	1/13/2000 2:30:00 PM
From: emmeling	Read Replies (2) of 54805

The switching costs are that high. RDBMS's differ in the way they store different types of data, range of values accepted, how long text fields may be, in what order different types of fields must appear, how referential integrity is specified and enforced, how stored procedures and triggers are written, etc. Once an application starts making assumptions about these things in its code, it's very hard to switch to another RDBMS. (Sort of like those 2-digit year assumptions that were embedded in all that COBOL code...) It may not be that important which RDBMS you choose when you start writing your application, but once you've committed -- you don't want to change your mind too often! --Tracey

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