ch01
... – An entity is a person, place, event or thing, about which we wish to store information – A relationship is a connection between entities, about which we wish to store information – A relationship can be considered as a special case of entities – Entities have properties – Properties are the charac ...
... – An entity is a person, place, event or thing, about which we wish to store information – A relationship is a connection between entities, about which we wish to store information – A relationship can be considered as a special case of entities – Entities have properties – Properties are the charac ...
ppt
... ACID Properties A transaction is a unit of program execution that accesses and possibly updates various data items. To preserve the integrity of data the database system must ensure: Atomicity. Either all operations of the transaction are properly reflected ...
... ACID Properties A transaction is a unit of program execution that accesses and possibly updates various data items. To preserve the integrity of data the database system must ensure: Atomicity. Either all operations of the transaction are properly reflected ...
distributed databases
... Distributed database (DD) is the database component of distributed processing. A DD is a single logical DB that is physically distributed to computers at several sites in a computer network. A distributed database management system is needed to support and manipulate DDs. A communications network al ...
... Distributed database (DD) is the database component of distributed processing. A DD is a single logical DB that is physically distributed to computers at several sites in a computer network. A distributed database management system is needed to support and manipulate DDs. A communications network al ...
Course Outline
... Students are expected to have the basic knowledge of software development and computers. Knowledge about data structures, algorithms, and programming languages is also good but is not mandatory. Course Objectives A database system is one of the leading topics in computer science. This is leading in ...
... Students are expected to have the basic knowledge of software development and computers. Knowledge about data structures, algorithms, and programming languages is also good but is not mandatory. Course Objectives A database system is one of the leading topics in computer science. This is leading in ...
DATABASES - Computer Science
... information from the database. Update, for example: Insert a new employee, Delete a department, Update someone’s salary…. Retrieve, for example: Retrieve the names of employees who work on multiple projects…… ...
... information from the database. Update, for example: Insert a new employee, Delete a department, Update someone’s salary…. Retrieve, for example: Retrieve the names of employees who work on multiple projects…… ...
Programming Games in Visual Basic: Data base
... A question is a record in the table. Question includes the following fields: Question text two model answers (more on this later) Point value (may be set as currency) category used switch (yes/no) ...
... A question is a record in the table. Question includes the following fields: Question text two model answers (more on this later) Point value (may be set as currency) category used switch (yes/no) ...
04CM20145Lecture9 - Department of Computer Science
... When the transaction is committed, the database must be consistent. Two main issues to deal with: Failures, e.g. hardware failures and system crashes. Concurrency, for simultaneous execution of multiple transactions. ©Silberschatz, Korth and Sudarshan Modifications & additions by S Bird, J B ...
... When the transaction is committed, the database must be consistent. Two main issues to deal with: Failures, e.g. hardware failures and system crashes. Concurrency, for simultaneous execution of multiple transactions. ©Silberschatz, Korth and Sudarshan Modifications & additions by S Bird, J B ...
Transaction Processing Systems
... • Done as input in other information systems including: – DSSs, decision support systems – MISs, management information systems ...
... • Done as input in other information systems including: – DSSs, decision support systems – MISs, management information systems ...
Access lesson 1 Database Basics
... • Controls the type of data a field will contain whether it is text, number, date/time, or some other type of data. ...
... • Controls the type of data a field will contain whether it is text, number, date/time, or some other type of data. ...
Document
... • Define the terms database and database management system (DBMS). • List three tasks that a DBMS enables users to do. • Differentiate between flat-file databases and relational databases. • List three steps needed to create a database. ...
... • Define the terms database and database management system (DBMS). • List three tasks that a DBMS enables users to do. • Differentiate between flat-file databases and relational databases. • List three steps needed to create a database. ...
microsoft access - Calhoun County Schools
... automatically. When you make changes, the original data file you retrieve will be changed. • A form, a query, a report and a table can all be PART of one database. • Your first step in creating a database is to create a file that will hold all of your “objects” for that database. ...
... automatically. When you make changes, the original data file you retrieve will be changed. • A form, a query, a report and a table can all be PART of one database. • Your first step in creating a database is to create a file that will hold all of your “objects” for that database. ...
Assignment 1 - Al Akhawayn University
... 5.3 A database that supports users across many departments is known as a workgroup database. 5.4 A single user database can support one user at the same time. 5.5 Data anomalies exist because a change in any field value can't be made in multiple places. 5.6 Data redundancy is reduced 100% by databas ...
... 5.3 A database that supports users across many departments is known as a workgroup database. 5.4 A single user database can support one user at the same time. 5.5 Data anomalies exist because a change in any field value can't be made in multiple places. 5.6 Data redundancy is reduced 100% by databas ...
Document
... Another problem that affected the NA9 database tier cropped up due to "an unexpected fault with [their] database code." ...
... Another problem that affected the NA9 database tier cropped up due to "an unexpected fault with [their] database code." ...
The Database Environment - Eastern Michigan University
... Database analysts Database and data administrators Systems programmers & ...
... Database analysts Database and data administrators Systems programmers & ...
Course Syllabus
... X computer literacy ethics/values citizenship global concerns information resources ...
... X computer literacy ethics/values citizenship global concerns information resources ...
Misuse Detection in Database Systems Through
... malicious code (viruses, worms, time bombs, etc.) in programs and to detect attempts to penetrate or misuse computer systems, especially computer networks. With respect to verification, he is applying an automated theorem prover (Higher Order Logic - HOL) to the verification of hardware and software ...
... malicious code (viruses, worms, time bombs, etc.) in programs and to detect attempts to penetrate or misuse computer systems, especially computer networks. With respect to verification, he is applying an automated theorem prover (Higher Order Logic - HOL) to the verification of hardware and software ...
Relational Databases - U of W ACS Homepage
... name Smith, and is of Male gender Employee with ID 333 has a first name Jim, a last name Jones, and is of Male gender ...
... name Smith, and is of Male gender Employee with ID 333 has a first name Jim, a last name Jones, and is of Male gender ...
Sistem Basis Data
... • Update -> updates existing data within a table • Delete -> deletes all records from a table, the space for the records remain • Merge -> upsert operation (insert or update) • Call -> call a procedure language / SQL or java subprogram • Explain plan -> explain access path to data • Lock table -> co ...
... • Update -> updates existing data within a table • Delete -> deletes all records from a table, the space for the records remain • Merge -> upsert operation (insert or update) • Call -> call a procedure language / SQL or java subprogram • Explain plan -> explain access path to data • Lock table -> co ...
What is a Transaction?
... different state than T2 followed by T1 • But both would be correct (consistent) from the DB point of view • Transaction serializability means that transactions executing concurrently must be interleaved in such a way that the resulting DB state is equal to some serial execution of the same transacti ...
... different state than T2 followed by T1 • But both would be correct (consistent) from the DB point of view • Transaction serializability means that transactions executing concurrently must be interleaved in such a way that the resulting DB state is equal to some serial execution of the same transacti ...