View PDF - People at the Department of Computer Science
... user applications. The external schema maps onto the conceptual schema, which is described below. There may be many external schemas, each reflecting a simplified model of the world, as seen by particular applications. External schemas may be modified, or new ones created, without the need to make ...
... user applications. The external schema maps onto the conceptual schema, which is described below. There may be many external schemas, each reflecting a simplified model of the world, as seen by particular applications. External schemas may be modified, or new ones created, without the need to make ...
from instructor - Computer Science
... The where clause specifies conditions that the result must satisfy Corresponds to the selection predicate of the relational algebra. To find all instructors in Comp. Sci. dept with salary > 80000 select name from instructor where dept_name = ‘Comp. Sci.' and salary > 80000 Comparison results can be ...
... The where clause specifies conditions that the result must satisfy Corresponds to the selection predicate of the relational algebra. To find all instructors in Comp. Sci. dept with salary > 80000 select name from instructor where dept_name = ‘Comp. Sci.' and salary > 80000 Comparison results can be ...
Chapter 2: Relational Model
... key of another relation. The attribute is called a foreign key. E.g. customer_name and account_number attributes of depositor are foreign keys to customer and account respectively. Only values occurring in the primary key attribute of the referenced relation may occur in the foreign key attribut ...
... key of another relation. The attribute is called a foreign key. E.g. customer_name and account_number attributes of depositor are foreign keys to customer and account respectively. Only values occurring in the primary key attribute of the referenced relation may occur in the foreign key attribut ...
Chapter 2: Relational Model
... Database System Concepts, 5th Ed. ©Silberschatz, Korth and Sudarshan See www.db-book.com for conditions on re-use ...
... Database System Concepts, 5th Ed. ©Silberschatz, Korth and Sudarshan See www.db-book.com for conditions on re-use ...
Oracle Database HA Technical Comparison
... For protection of data from various media failures, Oracle database offers Recovery Manager (RMAN), which is a comprehensive backup, restore and recovery solution for the Oracle database. With RMAN, backups of the Oracle database can be taken online, without requiring expensive downtime. Furthermore ...
... For protection of data from various media failures, Oracle database offers Recovery Manager (RMAN), which is a comprehensive backup, restore and recovery solution for the Oracle database. With RMAN, backups of the Oracle database can be taken online, without requiring expensive downtime. Furthermore ...
Data Sheet: Oracle Exadata Database Machine X4-8
... table to different tablespaces, files or LUNs as is often required with traditional storage. A single full rack Exadata Database Machine X4-8, with 2 database servers and 14 High Capacity storage servers can achieve up to 140 GB per second of data scan bandwidth, and up to 3.6 Million random 8K read ...
... table to different tablespaces, files or LUNs as is often required with traditional storage. A single full rack Exadata Database Machine X4-8, with 2 database servers and 14 High Capacity storage servers can achieve up to 140 GB per second of data scan bandwidth, and up to 3.6 Million random 8K read ...
Database Connectivity Toolset User Manual
... negligence. Any action against National Instruments must be brought within one year after the cause of action accrues. National Instruments shall not be liable for any delay in performance due to causes beyond its reasonable control. The warranty provided herein does not cover damages, defects, malf ...
... negligence. Any action against National Instruments must be brought within one year after the cause of action accrues. National Instruments shall not be liable for any delay in performance due to causes beyond its reasonable control. The warranty provided herein does not cover damages, defects, malf ...
STORAGE TIERING FOR DB2 FOR LINUX, UNIX, AND WINDOWS (LUW) WITH
... have different I/O workload profiles – some heavy and some light, some sequential and some random, and so on. By placing each database into its own set of file systems, or other volume manager disk groups, it makes it easier to place the right data on the right storage type. This approach also helps ...
... have different I/O workload profiles – some heavy and some light, some sequential and some random, and so on. By placing each database into its own set of file systems, or other volume manager disk groups, it makes it easier to place the right data on the right storage type. This approach also helps ...
Performance Optimizer 2.0.0 Product Guide
... McAfee Agent to drill down and select a specific system, then perform an action. The acceptable minimum score can be adjusted for the assessments that are included in Performance Optimizer: Analyze ePO configuration, database configuration, and database backups. ...
... McAfee Agent to drill down and select a specific system, then perform an action. The acceptable minimum score can be adjusted for the assessments that are included in Performance Optimizer: Analyze ePO configuration, database configuration, and database backups. ...
Chapter 7: Relational Database Design
... In bor_loan, because loan_number is not a candidate key, the amount of a loan may have to be repeated. This indicates the need to decompose bor_loan. ...
... In bor_loan, because loan_number is not a candidate key, the amount of a loan may have to be repeated. This indicates the need to decompose bor_loan. ...
Keyword Search over Relational Databases: A Metadata Approach
... that index the database content [2] are used. By using these indices, they may directly retrieve the tuples of interest, or they may instead construct the queries expressions that retrieve these tuples when evaluated. This is the basic idea followed by the modern commercial database management syste ...
... that index the database content [2] are used. By using these indices, they may directly retrieve the tuples of interest, or they may instead construct the queries expressions that retrieve these tuples when evaluated. This is the basic idea followed by the modern commercial database management syste ...
Security and Backups
... • Process of restoring database from either cold or hot backup files • Necessary after database failure • Cold backup recovery: – Shut down database – Restore backed up control file and datafiles to database server – Restart database Guide to Oracle 10g Advanced Databases ...
... • Process of restoring database from either cold or hot backup files • Necessary after database failure • Cold backup recovery: – Shut down database – Restore backed up control file and datafiles to database server – Restart database Guide to Oracle 10g Advanced Databases ...
File - You have to dream before your dreams can come
... • Error Handling: PL/SQL handles errors or exceptions effectively during the execution of a PL/SQL program. Once an exception is caught, specific actions can be taken depending upon the type of the exception or it can be displayed to the user with a message. ...
... • Error Handling: PL/SQL handles errors or exceptions effectively during the execution of a PL/SQL program. Once an exception is caught, specific actions can be taken depending upon the type of the exception or it can be displayed to the user with a message. ...
www.ipeirotis.com
... 120 queries per database on average needed for choice of thresholds, no documents retrieved Only small part of hierarchy “explored” Queries are short: 1.5 words on average; 4 words maximum (easily handled by most Web databases) ...
... 120 queries per database on average needed for choice of thresholds, no documents retrieved Only small part of hierarchy “explored” Queries are short: 1.5 words on average; 4 words maximum (easily handled by most Web databases) ...
What is data? Databases - Introduction
... optimizations to make the most common operations as fast as possible. In particular, the DBMS can maintain various indexes to the data to make querying the database quick; the user can control which indexes are present, but need not know how they are implemented. Database storage and indexing strate ...
... optimizations to make the most common operations as fast as possible. In particular, the DBMS can maintain various indexes to the data to make querying the database quick; the user can control which indexes are present, but need not know how they are implemented. Database storage and indexing strate ...
Performance Auditing For Microsoft SQL Server
... Data Space Allocation Trends - Comparison by Database ................................................... 35 Log Space Allocation Trends - Comparison by Database..................................................... 36 Data and Log Space Details ....................................................... ...
... Data Space Allocation Trends - Comparison by Database ................................................... 35 Log Space Allocation Trends - Comparison by Database..................................................... 36 Data and Log Space Details ....................................................... ...
Agenda
... 1. Verify if primary can be switched over to standby SQL> select switchover_status from v$database; If value returns “TO_STANDBY”, its alright to switch the primary to standby role. 2. Convert primary to standby SQL> alter database commit to switchover to physical standby; If value is “SESSIONS ACTI ...
... 1. Verify if primary can be switched over to standby SQL> select switchover_status from v$database; If value returns “TO_STANDBY”, its alright to switch the primary to standby role. 2. Convert primary to standby SQL> alter database commit to switchover to physical standby; If value is “SESSIONS ACTI ...
Ch3
... Order of tuples not important Order of attributes not important (in theory) Collection of relation schemas (intension) Relational database schema Corresponding relation instances (extension) Relational database ...
... Order of tuples not important Order of attributes not important (in theory) Collection of relation schemas (intension) Relational database schema Corresponding relation instances (extension) Relational database ...
Chapter 16: Maintaining High Availability
... server. This is initially accomplished through the use of a full database backup on the primary server that is restored to the standby server using either the NORECOVERY or the STANDBY restoration options. Using one of these two options leaves the standby database in recovery mode, so that additiona ...
... server. This is initially accomplished through the use of a full database backup on the primary server that is restored to the standby server using either the NORECOVERY or the STANDBY restoration options. Using one of these two options leaves the standby database in recovery mode, so that additiona ...
Upgrade your Complex DB2 Environment
... This presentation will be in workshop hands-on format. It will cover the best method for upgrading a complex environment from DB2 UDB 7.1 to DB2 UDB 8.1. It will also cover “gotchas” for performing database migration from old hardware and operating systems to new hardware and operating system versio ...
... This presentation will be in workshop hands-on format. It will cover the best method for upgrading a complex environment from DB2 UDB 7.1 to DB2 UDB 8.1. It will also cover “gotchas” for performing database migration from old hardware and operating systems to new hardware and operating system versio ...
Graph Databases
... worked natively with graphs. Our vision was to keep all the proven features from the relational database (transactions, ACID, triggers, etc.) but use a data model for the 21st century. Project Neo was born, and with it graph databases as we know them today. The first decade of the new millennium has ...
... worked natively with graphs. Our vision was to keep all the proven features from the relational database (transactions, ACID, triggers, etc.) but use a data model for the 21st century. Project Neo was born, and with it graph databases as we know them today. The first decade of the new millennium has ...
How to Save Money, Reduce Risk, and Database Systems
... systems, operating system instances, administrative rights, patching, and updates. By adding other modules from the Oracle Enterprise Manager family, administrators can control Oracle Database instances and Oracle Applications across the entire enterprise. Oracle has also invested in engineering bes ...
... systems, operating system instances, administrative rights, patching, and updates. By adding other modules from the Oracle Enterprise Manager family, administrators can control Oracle Database instances and Oracle Applications across the entire enterprise. Oracle has also invested in engineering bes ...
Ch.8 - Faculty Website Listing
... then dept_name would be a candidate key.” This example also shows how functional dependencies (FD) are different from keys: a FD captures a rule that is in general more granular than a key. A key is a FD, but a FD is not always a key! ...
... then dept_name would be a candidate key.” This example also shows how functional dependencies (FD) are different from keys: a FD captures a rule that is in general more granular than a key. A key is a FD, but a FD is not always a key! ...