SQL Apprentice Question
Distinct(in oracle and SQL server) and Unique(in oracle) are they both same
Can we use them interchangeably?
Celko Answers
>> Distinct(in oracle and SQL server) and Unique(in oracle) are they both same Can we use them interchangeably? <<
No. That is one of MANY Oracle dialect screw-ups to prevent Standard,
portable code. The UNIQUE() constraint is part of the DDL; the
DISTINCT option is part of the DML.
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