Operations for Nd Select
N-dimensional select queries = condition on ≥1 attributes.
- pmr = partial-match retrieval (equality tests), e.g.
select * from Employees
where job = 'Manager' and gender = 'M';
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- space = tuple-space queries (range tests), e.g.
select * from Employees
where 20 ≤ age ≤ 50 and 40K ≤ salary ≤ 60K
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