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Basics of IDMS - great for reviewing for interviews:
IDMS is a network (CODASYL) database sold by Computer Associates (originally marketed by Cullinane/Cullinet, the first software company to make it on the New York Stock Exchange).
IBM's IMS is a hierarchical database. DB2, Oracle, Microsoft/SQL, Informix, etc... are relational databases. IDMS does have some relational capabilities, but based on what I have seen, only a small percentage of sites have taken advantage of this option (primarily because it is an extra-cost option from CA).
DBA = Database Administrator - Some sites separate the duties of the DBA and the System Programmer. At other sites, the DBA provides both functions. A system programmer is more likely to do installs and work with exits, where as the DBA is more likely to deal with logical and physical database design, schemas, DMCL, etc...
CA = Computer Associates - the company that bought IDMS from Cullinet in approx 1989.
- Bibhu priya
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