redo log files
... Once created, an index is automatically maintained and used by Oracle. Changes to table data are automatically incorporated into all relevant indexes with complete transparency to the users. • Clusters are groups of one or more tables physically stored together because they share common columns and ...
... Once created, an index is automatically maintained and used by Oracle. Changes to table data are automatically incorporated into all relevant indexes with complete transparency to the users. • Clusters are groups of one or more tables physically stored together because they share common columns and ...
ExamView - Chap9-Hwk-and
... ____ 49. A check digit cannot be used to confirm the accuracy of a primary key value. ____ 50. Sharing data from multiple, separate files is complicated and usually requires the experience of a computer programmer. ____ 51. Data redundancy in a data storage system always decreases the chance of erro ...
... ____ 49. A check digit cannot be used to confirm the accuracy of a primary key value. ____ 50. Sharing data from multiple, separate files is complicated and usually requires the experience of a computer programmer. ____ 51. Data redundancy in a data storage system always decreases the chance of erro ...
Mobile Computing and Databases
... desire access to these database servers. Two main operations on a database are considered: Read and Write. Each of these could be performed on a server or set of servers. ...
... desire access to these database servers. Two main operations on a database are considered: Read and Write. Each of these could be performed on a server or set of servers. ...
Introduction to Database Systems
... log entry wasn’t saved before the crash, corresponding change was not applied to database!) ...
... log entry wasn’t saved before the crash, corresponding change was not applied to database!) ...
Managing Databases and Tables
... it is good practice to treat all identifiers as case sensitive, even if you are working on a Windows system Column names, indexes, and aliases are never case sensitive in MySQL. ...
... it is good practice to treat all identifiers as case sensitive, even if you are working on a Windows system Column names, indexes, and aliases are never case sensitive in MySQL. ...
database management system and information retrival
... Pharmaceutical data bases, and library Information systems, and with growing awareness office information systems. A characteristically feature of these applications is the fact that it is necessary to combine text management and retrieval with usual formatted data manipulation. Therefore a single u ...
... Pharmaceutical data bases, and library Information systems, and with growing awareness office information systems. A characteristically feature of these applications is the fact that it is necessary to combine text management and retrieval with usual formatted data manipulation. Therefore a single u ...
Accessing the MySQL Database with PHP
... what's good and bad about this design? good: simple (one table), can see all data in one place bad: redundancy (name, email, course repeated frequently) bad: most searches (e.g. find a student's courses) will have to rely on string comparisons bad: there is no single column whose value will be ...
... what's good and bad about this design? good: simple (one table), can see all data in one place bad: redundancy (name, email, course repeated frequently) bad: most searches (e.g. find a student's courses) will have to rely on string comparisons bad: there is no single column whose value will be ...
Brief description of data warehouses and data marts:
... Decoupling of logical database design from physical database design as an example of Bridge. Aggregation/composition in EER as examples of Composite. Views as an example of Façade and Observer. Brief Description of Data Warehouses and Data Marts: Databases are transactional in nature and they are us ...
... Decoupling of logical database design from physical database design as an example of Bridge. Aggregation/composition in EER as examples of Composite. Views as an example of Façade and Observer. Brief Description of Data Warehouses and Data Marts: Databases are transactional in nature and they are us ...
Database Design: DBS CB, 2nd Edition
... CanDrink(drinker, beer) is a view “containing” the drinker-beer pairs such that the drinker frequents at least one bar that serves the beer: CREATE VIEW CanDrink AS SELECT drinker, beer FROM Frequents, Sells WHERE Frequents.bar = Sells.bar; ...
... CanDrink(drinker, beer) is a view “containing” the drinker-beer pairs such that the drinker frequents at least one bar that serves the beer: CREATE VIEW CanDrink AS SELECT drinker, beer FROM Frequents, Sells WHERE Frequents.bar = Sells.bar; ...
CS 504 - Office of the Provost
... If this course includes subject matter currently dealt with by any other units, the originating department must circulate this proposal for review by those units and obtain the necessary signatures prior to submission. Failure to do so will delay action on this proposal. ...
... If this course includes subject matter currently dealt with by any other units, the originating department must circulate this proposal for review by those units and obtain the necessary signatures prior to submission. Failure to do so will delay action on this proposal. ...
Introduction to Database and DBMS
... 3. Relational databases put data into independent tables (files). Users can then link the tables as they wish with many to many relationships. They are slower than network and hierarchical databases, but they are more flexible. 4. Object-oriented databases are even more flexible than relational data ...
... 3. Relational databases put data into independent tables (files). Users can then link the tables as they wish with many to many relationships. They are slower than network and hierarchical databases, but they are more flexible. 4. Object-oriented databases are even more flexible than relational data ...
SQL database Maintenance Tool
... Using this tool, the user can set his/her preferences for frequency and the time of day each job should be performed. It also gives the possibility to define email settings so that upon success or failure of each job a corresponding message is sent to the defined email address. The email messages ar ...
... Using this tool, the user can set his/her preferences for frequency and the time of day each job should be performed. It also gives the possibility to define email settings so that upon success or failure of each job a corresponding message is sent to the defined email address. The email messages ar ...
WinForms – Basic Controls
... ToolStrip control • The ToolStrip control is a new control in .Net Framework 2.0. • The ToolStrip control is used to create the ToolStrip control. • When this control is palced on the form you can add buttons, lables, seperators, combo boxes, and drop down buttons using the ToolStrip control. ...
... ToolStrip control • The ToolStrip control is a new control in .Net Framework 2.0. • The ToolStrip control is used to create the ToolStrip control. • When this control is palced on the form you can add buttons, lables, seperators, combo boxes, and drop down buttons using the ToolStrip control. ...
Recovery
... redo updates of transactions that committed. In total: whenever a transaction T updates an object, both before- and after-image are written as one log-record and appended to the log. Additionally: when transaction starts, a BEGIN record is appended to the log; when transaction commits/aborts, a comm ...
... redo updates of transactions that committed. In total: whenever a transaction T updates an object, both before- and after-image are written as one log-record and appended to the log. Additionally: when transaction starts, a BEGIN record is appended to the log; when transaction commits/aborts, a comm ...
Upgrading from Firebird 1.5 to 2.5 and beyond You certainly know
... The names for column and table aliases and for local variables names in PSQL are now restricted to 31 bytes • in length. • User names are treated as SQL identifiers and are accordingly now limited to 31 bytes in length. • Cursor Output Columns Must Be Named (aliased, important for expressions) • ali ...
... The names for column and table aliases and for local variables names in PSQL are now restricted to 31 bytes • in length. • User names are treated as SQL identifiers and are accordingly now limited to 31 bytes in length. • Cursor Output Columns Must Be Named (aliased, important for expressions) • ali ...
Access Data
... allows bypassing of transaction log by using special commands. • Logging is normally bypassed for bulk inserts of large amounts of stored data stored (eg batch processing) or actions like SELECT INTO based on another large table. • Bypassing logging is a recovery compromise but it greatly improves p ...
... allows bypassing of transaction log by using special commands. • Logging is normally bypassed for bulk inserts of large amounts of stored data stored (eg batch processing) or actions like SELECT INTO based on another large table. • Bypassing logging is a recovery compromise but it greatly improves p ...
Introduction - University of Virginia, Department of Computer Science
... log entry wasn’t saved before the crash, corresponding change was not applied to database!) ...
... log entry wasn’t saved before the crash, corresponding change was not applied to database!) ...
Database Systems
... A DBMS in which the data items and the relationships among them are organized into tables Tables A collection of records Records (object, entity) A collection of related fields that make up a single database entry Fields (attributes) A single value in a database record ...
... A DBMS in which the data items and the relationships among them are organized into tables Tables A collection of records Records (object, entity) A collection of related fields that make up a single database entry Fields (attributes) A single value in a database record ...
Database management system
... A DBMS in which the data items and the relationships among them are organized into tables Tables A collection of records Records (object, entity) A collection of related fields that make up a single database entry Fields (attributes) A single value in a database record ...
... A DBMS in which the data items and the relationships among them are organized into tables Tables A collection of records Records (object, entity) A collection of related fields that make up a single database entry Fields (attributes) A single value in a database record ...
Transactions - Computer Information Systems
... T1 - completed prior to check point T2 - started prior to checkpoint, completed after checkpoint but before crash T3 - started prior to checkpoint, did not complete before crash T4 - started after checkpoint, completed before crash T5 - started after checkpoint, did not complete before crash ...
... T1 - completed prior to check point T2 - started prior to checkpoint, completed after checkpoint but before crash T3 - started prior to checkpoint, did not complete before crash T4 - started after checkpoint, completed before crash T5 - started after checkpoint, did not complete before crash ...
Document
... Data independence: Application programs not dependent on data representation and storage details Data sharing: data is better utilized (discovered and reused), redundancy of data is minimized Data integrity and consistency: one may enforce consistency constraints on data, e.g., number of seats sold ...
... Data independence: Application programs not dependent on data representation and storage details Data sharing: data is better utilized (discovered and reused), redundancy of data is minimized Data integrity and consistency: one may enforce consistency constraints on data, e.g., number of seats sold ...