4 research outputs found
Graphical web based tool for generating query from star schema
This paper presents the development of a graphical SQL query tool that allows novice and non-technical users to navigate through database tables and generate their own queries.The tool enables the query output to be presented in graphical and tabular forms, which can help users, especially top management in better understanding and interpreting query results.The algorithms to construct
complex SQL query from star schema in databases is also presented
Graphical Web Based Tool for Generating Query from Star Schema
Novice users have difficulty to generate structured query language from the star schemas because they are not familiar with formulating SQL queries and SQL syntax. This study proposed graphical web based tool to generate queries from star schema and represent the data in tabular or graphical forms which help novice user to formulate SQL query. A prototype for a web based tool to generate the query has been developed using Java Server Pages programming language. The developed tool can facilitate complex query construction which is faced by non-technical and/or novice users. The output of SQL query is presented in tabular and graphical forms which can help users especially top management in better understanding and
interpreting query results
A Graphical Tool for Ad Hoc Query Generation
this paper we describe a graphical tool that facilitates formulation of ad hoc questions as SQL queries. This tool manages multiple attribute hierarchies and creates SQL query strings by navigating through the hierarchies. This interactive tool has been optimized using indexing to improve the overall speed of the query building and the data retrieval process. Indexed queries performed 5 to 100 times faster than query strings. However, query string generation time depends on the size of the taxonomies describing the hierarchies, while the index generation time depends on the size of the data warehouse. INTRODUCTIO
An investigation of computer based nominal data record linkage
The Internet now provides access to vast volumes of nominal data (data associated
with names e. g. birth/death records, parish records, text articles, multimedia) collected
for a range of different purposes. This research focuses on parish registers containing
baptism, marriage, and burial records. Mining these data resources involves linkage
investigating as to how two records are related with regards to attributes like surname,
spatio-temporal location, legal association and inter-relationships. Furthermore, as
well as handling the implicit constraints of nominal data, such a system must also be
able to handle automatically a range of temporal and spatial rules and constraints.
The research examines the linkage rules that apply and how such rules interact. In
this investigation a report is given of the current practices in several disciplines (e. g.
history, demography, genealogy, and epidemiology) and how these are implemented
in current computer and database systems. The practical aspects of this study, and the
workbench approach proposed are centred on the extensive Lancashire & Cheshire
Parish Register archive held on the MIMAS database computer located at Manchester
University. The research also proposes how these findings can have wider
applications.
This thesis describes some initial research into this problem. It describes three
prototypes of nominal data workbench that allow the specification and examination of
several linkage types and discusses the merits of alternative name matching methods,
name grouping techniques and method comparisons. The conclusion is that in the
cases examined so far, effective nominal data linkage is essentially a query
optimisation process. The process is made more efficient if linkage specific indexes
exist, and suggests that query re-organization based on these indexes, though a
complex process, is entirely feasible. To facilitate the use of indexes and to guide the
optimization process, the work suggests the use of formal ontologies