Add to ORKGDue to increasing capacity of storage devices and speed of computer networks during last years, it is still more required to sort and search data effectively. Query result containing thousands of rows is usually useless and unreadable. In that situation, users may prefer to define constraints and sorting priorities in the query, and see only several top rows from the result. This thesis deals with top-k queries problems, extension of relational algebra by new operators and their implementation in database system. It focuses on optimization of operations join and sort. The thesis includes implementation and comparison of some algorithms in standalone .NET library NRank
Rank-aware query processing has emerged as a key requirement in modern applications. In these applic...
Keyword search in relational databases allows the user to search information without knowing databas...
Traditional top-k algorithms, e.g., TA and NRA, have been successfully applied in many areas such as...
Abstract—Information systems apply various techniques to rank query answers. Ranking queries (or top...
This paper introduces RankSQL, a system that provides a systematic and principled framework to suppo...
the large scale is to select Topic with a view to ranking from multiple sources so that transfer cos...
This dissertation focuses on supporting ranking in relational database systems through a rank-aware ...
Introduction Ranking queries (or top-k queries) are dominant in many emerging applications, e.g., s...
Rank-aware query processing has emerged as a key requirement in modern applications. In these applic...
Advanced Data Mining applications require more and more support from relational database engines. Es...
The answer to a top-k query is an ordered set of tuples, where the ordering is based on how closely ...
Today with the growth of the Internet, there has been a big growth in the number of users who want t...
161 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1980.This report develops a new al...
International audienceThe general problem of answering top-k queries can be modeled using lists of d...
Top-k and Skyline queries are a long study topic in database and information retrieval communities a...
Rank-aware query processing has emerged as a key requirement in modern applications. In these applic...
Keyword search in relational databases allows the user to search information without knowing databas...
Traditional top-k algorithms, e.g., TA and NRA, have been successfully applied in many areas such as...
Abstract—Information systems apply various techniques to rank query answers. Ranking queries (or top...
This paper introduces RankSQL, a system that provides a systematic and principled framework to suppo...
the large scale is to select Topic with a view to ranking from multiple sources so that transfer cos...
This dissertation focuses on supporting ranking in relational database systems through a rank-aware ...
Introduction Ranking queries (or top-k queries) are dominant in many emerging applications, e.g., s...
Rank-aware query processing has emerged as a key requirement in modern applications. In these applic...
Advanced Data Mining applications require more and more support from relational database engines. Es...
The answer to a top-k query is an ordered set of tuples, where the ordering is based on how closely ...
Today with the growth of the Internet, there has been a big growth in the number of users who want t...
161 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1980.This report develops a new al...
International audienceThe general problem of answering top-k queries can be modeled using lists of d...
Top-k and Skyline queries are a long study topic in database and information retrieval communities a...
Rank-aware query processing has emerged as a key requirement in modern applications. In these applic...
Keyword search in relational databases allows the user to search information without knowing databas...
Traditional top-k algorithms, e.g., TA and NRA, have been successfully applied in many areas such as...