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Venn Diagrams and SQL Queries.
Terry A. Halpin
Published in:
Aust. Comput. J. (1989)
Keyphrases
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sql queries
relational databases
relational database systems
relational queries
duplicate elimination
xml documents
xml queries
query processing
b tree
database
database schema
xml schema
natural language questions
databases
schema mappings
query language
sql statements
feature extraction