Sample
... 13) What are the structures of a relational database, hierarchical database, and a network database? How is data retrieved from each of these types of databases? Answer: A relational database is structured as tables. A record is a row in one of the tables. The tables are related to each other by in ...
... 13) What are the structures of a relational database, hierarchical database, and a network database? How is data retrieved from each of these types of databases? Answer: A relational database is structured as tables. A record is a row in one of the tables. The tables are related to each other by in ...
(A) R - Avi Silberschatz
... Repetition of Information. Inability to represent certain information. ...
... Repetition of Information. Inability to represent certain information. ...
Fourth Generation Languages and PHP University of California, Berkeley School of Information Management
... Concurrency Control • The goal is to support access by multiple users to the same data, at the same time • It must assure that the transactions are serializable and that they are isolated • It is intended to handle several problems in an uncontrolled system • Specifically: – Lost updates – Inconsis ...
... Concurrency Control • The goal is to support access by multiple users to the same data, at the same time • It must assure that the transactions are serializable and that they are isolated • It is intended to handle several problems in an uncontrolled system • Specifically: – Lost updates – Inconsis ...
Chapter 1
... • Oracle Net Services component on the client side handles communication with remote database • Four variations, including: – Administrator: provides user management tools, including Enterprise Manager, to provide remote management of multiple databases – Runtime: intended primarily for programmers ...
... • Oracle Net Services component on the client side handles communication with remote database • Four variations, including: – Administrator: provides user management tools, including Enterprise Manager, to provide remote management of multiple databases – Runtime: intended primarily for programmers ...
Database Concepts - College of Computing
... What a Database Is and Is Not The word database is commonly used to refer to any of the following: ...
... What a Database Is and Is Not The word database is commonly used to refer to any of the following: ...
Chapter 3 Effects of IT on Strategy and Competition
... • A transaction consists of a set of DML operations committed as a block • Uncommitted DML operations can be undone by issuing the ROLLBACK command • A SAVEPOINT serves as a marker for a point in a transaction and allows rolling back only a portion of the transaction • Use the DELETE command to remo ...
... • A transaction consists of a set of DML operations committed as a block • Uncommitted DML operations can be undone by issuing the ROLLBACK command • A SAVEPOINT serves as a marker for a point in a transaction and allows rolling back only a portion of the transaction • Use the DELETE command to remo ...
Oracle Database Appliance X5
... que capacityondemand database software licensing model to quickly scale from 2 to 72 processor cores without any hardware upgrades. Customers can deploy the system and and license as few as 2 processors cores to run their database servers, and increm increme ental ntally scale up to the ...
... que capacityondemand database software licensing model to quickly scale from 2 to 72 processor cores without any hardware upgrades. Customers can deploy the system and and license as few as 2 processors cores to run their database servers, and increm increme ental ntally scale up to the ...
Migrating Applications and Databases to Oracle Database 12c
... This, prior to Oracle Database 12c, was largely left to testing to identify any issues which may arise. This time consuming and error-prone process has been largely eliminated with the introduction of the SQL Translation Framework in Oracle 12c [Oracle Docs.] The framework allows for the translators ...
... This, prior to Oracle Database 12c, was largely left to testing to identify any issues which may arise. This time consuming and error-prone process has been largely eliminated with the introduction of the SQL Translation Framework in Oracle 12c [Oracle Docs.] The framework allows for the translators ...
Windows Azure SQL Database
... (There are some parameter limitations and you must be connected to the master database) DROP DATABASE ...
... (There are some parameter limitations and you must be connected to the master database) DROP DATABASE ...
Automating layout of relational databases
... that are co-accessed during query execution. For workloads containing queries that co-access multiple objects, the gain in I/O performance by choosing an appropriate database layout other than full striping can be significant. While the specific problem of high random I/O accesses due to large co-ac ...
... that are co-accessed during query execution. For workloads containing queries that co-access multiple objects, the gain in I/O performance by choosing an appropriate database layout other than full striping can be significant. While the specific problem of high random I/O accesses due to large co-ac ...
Cracking the Database Store
... This paper’s contributions are threefold: (i) it introduces a database organization scheme based on cracking, (ii) it introduces a multi-query benchmark to analyze the cracking scheme, and (iii) evaluates a prototype implementation of the key algorithms. The experiments are run against out-of-the-bo ...
... This paper’s contributions are threefold: (i) it introduces a database organization scheme based on cracking, (ii) it introduces a multi-query benchmark to analyze the cracking scheme, and (iii) evaluates a prototype implementation of the key algorithms. The experiments are run against out-of-the-bo ...
ppt
... Example: If “Biology” is a department name appearing in one of the tuples in the instructor relation, then there exists a tuple in the department relation for “Biology”. ...
... Example: If “Biology” is a department name appearing in one of the tuples in the instructor relation, then there exists a tuple in the department relation for “Biology”. ...
Evaluating and Comparing Oracle Database Appliance X6
... The Oracle Database Appliance X6-2-HA is an Oracle Engineered System that saves time and money by simplifying deployment, maintenance, and support of high availability database solutions. Optimized for the world’s most popular database— Oracle Database—it integrates software, compute, storage, and n ...
... The Oracle Database Appliance X6-2-HA is an Oracle Engineered System that saves time and money by simplifying deployment, maintenance, and support of high availability database solutions. Optimized for the world’s most popular database— Oracle Database—it integrates software, compute, storage, and n ...
FAQ: Oracle Database Appliance
... the world’s most popular database—Oracle Oracle Database Database— it offers customers a fully integrated system of software, servers, storage, and networking that delivers high availability database services for a wide range of custom and packaged online transaction ansaction processing (OLTP), dat ...
... the world’s most popular database—Oracle Oracle Database Database— it offers customers a fully integrated system of software, servers, storage, and networking that delivers high availability database services for a wide range of custom and packaged online transaction ansaction processing (OLTP), dat ...
Chapter 7 Database Design Models— the UML Profile for Database Design
... many areas and more, it is a tremendous advantage to describe visually on the diagram as many things as possible. Database design is an iterative process; using models makes the constant change easier to manage and understand, allowing you to make changes to the models prior to code generation so yo ...
... many areas and more, it is a tremendous advantage to describe visually on the diagram as many things as possible. Database design is an iterative process; using models makes the constant change easier to manage and understand, allowing you to make changes to the models prior to code generation so yo ...
9I DATA GUARD: TRUTH, MYTHS, AND FAILOVER 9i Data Guard
... and therefore avoid reinstantiating other standby databases. If so, this is a graceful failover and it will be necessary to reinstantiate only the original primary database as a standby database. ...
... and therefore avoid reinstantiating other standby databases. If so, this is a graceful failover and it will be necessary to reinstantiate only the original primary database as a standby database. ...
SQL in the Real World
... • Host language: A conventional language (e.g., C, Java) that supplies control structures, computational capabilities, interaction with physical devices • SQL: supplies ability to interact with database. • Using the facilities of both: the application program can act as an intermediary between the u ...
... • Host language: A conventional language (e.g., C, Java) that supplies control structures, computational capabilities, interaction with physical devices • SQL: supplies ability to interact with database. • Using the facilities of both: the application program can act as an intermediary between the u ...
Chapter 14: Query Optimization
... and add newly generated expressions to the set of expressions found so far The above approach is very expensive in space and time Space requirements reduced by sharing common subexpressions: ...
... and add newly generated expressions to the set of expressions found so far The above approach is very expensive in space and time Space requirements reduced by sharing common subexpressions: ...
Database Cloud Service - Exadata
... Oracle’s experience implementing Oracle Exadata technology at thousands of missioncritical sites around the world. Available in dedicated ¼ rack, ½ rack or full rack configurations, it includes all the features of Oracle Exadata Database Machine, plus all the Oracle Database options. Simply put, it ...
... Oracle’s experience implementing Oracle Exadata technology at thousands of missioncritical sites around the world. Available in dedicated ¼ rack, ½ rack or full rack configurations, it includes all the features of Oracle Exadata Database Machine, plus all the Oracle Database options. Simply put, it ...
Document
... 1. r, s must have the same arity (same number of attributes) 2. The attribute domains must be compatible (example: 2nd column of r deals with the same type of values as does the 2nd column of s) Example: to find all courses taught in the Fall 2009 semester, or in the ...
... 1. r, s must have the same arity (same number of attributes) 2. The attribute domains must be compatible (example: 2nd column of r deals with the same type of values as does the 2nd column of s) Example: to find all courses taught in the Fall 2009 semester, or in the ...
MAA / Data Guard 12c Setup Guide Creating a RAC Physical
... DB_UNIQUE_NAME=stdrac' scope=both sid='*' SQL> alter system set LOG_ARCHIVE_FORMAT='%t_%s_%r.arc' scope=both sid='*' SQL> alter system set LOG_ARCHIVE_MAX_PROCESSES=8 scope=both sid='*' SQL> alter system set REMOTE_LOGIN_PASSWORDFILE=EXCLUSIVE scope=both sid='*' If you prefer to change the DB_UNIQUE ...
... DB_UNIQUE_NAME=stdrac' scope=both sid='*' SQL> alter system set LOG_ARCHIVE_FORMAT='%t_%s_%r.arc' scope=both sid='*' SQL> alter system set LOG_ARCHIVE_MAX_PROCESSES=8 scope=both sid='*' SQL> alter system set REMOTE_LOGIN_PASSWORDFILE=EXCLUSIVE scope=both sid='*' If you prefer to change the DB_UNIQUE ...