Relational Algebra is an offshoot of first-order logic and of the algebra of sets that deals with relations (sets of tuples).
I'm doing my best to bend my brain around arel and the relational algebra behind it, but how to represent …
distinct relational-algebra arelFor an exam, I am asked to get the list of clients having more than one rent, both as an …
sql relational-algebraWhat is tuple relational calculus (TRC) and domain relational calculus (DRC)? How do they differ with relational algebra? I am …
database relational-database relational-algebra tuple-relational-calculus domain-calculusHow do I represent a subquery in relation algebra? Do I put the new select under the previous select condition? …
sql relational-algebraCan anyone suggest resources that take a mathematical approach to relational databases? Essentially relational algebra I'd guess. I have a …
database math relational-database theory relational-algebraI have several SQL queries written that I want to convert to relational algebra. However, some of the queries use …
sql aggregate relational-algebraI have two documents one with tree structure and the other one relation to the first doc. Im trying to …
javascript join mapreduce couchdb relational-algebraWhat is the relational algebra expression of the query below? I couldn't find the expression for "Is Null". SELECT reader.…
null relational-algebraHow do I represent the SQL "not exists" clause in relational algebra?
sql relational-algebra relationalLet's say we have these tables: CREATE TABLE A ( id SERIAL NOT NULL PRIMARY KEY ); CREATE TABLE B ( id SERIAL …
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