Browsing by Subject "Database design."

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A database for evaluating stocks trading in ISE
(1994) Kaya, Arda
This thesis is a design of a database that will store and manage the data of Istanbul Stock Exchange. The system is capable of storing the data of all companies for the time periods defined, adjusting price data to normalize capital increase and dividend effects, and producing custom designed reports to provide users flexibility. The program, which provides interface to database, is menu driven and user friendly.
Open Access
Objective: a benchmark for object-oriented active database systems
(1996) Çetintemel, Uğur
Although much work in the area of Active Database Management Systems (ADBMSs) has been done, there have been only a few attempts to evaluate the performance of these systems, and it is not yet clear how the performance of an active DBMS can be evaluated systematically. In this thesis, we describe the OBJECTIVE Benchmark for object-oriented ADBMSs, and present experimental results from its implementation in an active database system prototype. OBJECTIVE can be used to identify performance bottlenecks and active functionalities of an ADBMS, and compare the performance of multiple ADBMSs. The philosophy of OBJECTIVE is to isolate components providing active functionalities, and concentrate only on the performance of these components while attempting to minimize the effects of other factors.
Open Access
A student database
(1990) Kemaloğlu, Turgut
Tiiis tfiesia is a design of student database systeia whicii will manage the data of university students. The aim of the pi"ogram is to obtain sorted lists of students according to / several parameters,/ to obtain frequency of grades for the specified course, to design a suitable sheet whicn will summarize course and grade position of each student and to store all the related data about students for easy access whenever required.
Open Access
Transaction execution in multidatabase systems
(1996) Devirmiş, Timuçin
Most work in the multiclatabase systems (MDBSs) area has focused on the issues of transaction management and concurrency control. It is difficult to implement traditional transaction management techniques in a MDBS due to the heterogeneity and autonomy of the connected local sites. In this thesis, we present a new transaction execution model that captures the formalism and semantics of various extended transaction models and adopts them to a MDBS environment. The proposed model covers nested transactions, various dejjendenc}' types among subtransactions, and commit-independent transactions. The execution model does not make any assumption regarding the concurrency control protocols executed at the local sites connected to the MDBS. VVe also present a detailed simulation model of a MDBS to aiiiilyze the performance of the proposed model. The performances of both the traditional transaction model and the proposed transaction model are evaluated under a range of workloads and system configurations. The performance impact of global transactions’ behavior on local transactions is also discussed.