Chapter 22: Relational Databases
... number because the customer name by itself may not be unique. For example, there may well be multiple Electronics Unlimited stores in various locations. Thus, the customer name alone does not uniquely identify a record (a row of data), so we cannot use the name as a link between the two tables. In ...
... number because the customer name by itself may not be unique. For example, there may well be multiple Electronics Unlimited stores in various locations. Thus, the customer name alone does not uniquely identify a record (a row of data), so we cannot use the name as a link between the two tables. In ...
SQL DOM: Compile Time Checking of Dynamic SQL Statements
... between the two goals, we always chose the first goal. One example of the struggle between these two goals occurred during the design of the class that would be used to construct insert SQL statements. For an insert SQL statement to be valid it has to contain a value for every column in the table th ...
... between the two goals, we always chose the first goal. One example of the struggle between these two goals occurred during the design of the class that would be used to construct insert SQL statements. For an insert SQL statement to be valid it has to contain a value for every column in the table th ...
DataBase Management Systems Lecture Notes
... 4.Standards can be enforced. 5.Security restrictions can be applied. 6.Integrity can be maintained. 7.Data gathering can be possible. 8.Requirements can be balanced. Database Management System (DBMS): It is a collection of programs that enables user to create and maintain a database. In other words ...
... 4.Standards can be enforced. 5.Security restrictions can be applied. 6.Integrity can be maintained. 7.Data gathering can be possible. 8.Requirements can be balanced. Database Management System (DBMS): It is a collection of programs that enables user to create and maintain a database. In other words ...
Standard Query Language (SQL)
... The extensions are implemented for different applications – such as data mining, data warehousing, multimedia etc. SQL-2006 added XML features; In 2008 they added Object-oriented features. SQL-3 is the current standard which started with SQL-1999. It is not fully implemented in any RDBMS. ...
... The extensions are implemented for different applications – such as data mining, data warehousing, multimedia etc. SQL-2006 added XML features; In 2008 they added Object-oriented features. SQL-3 is the current standard which started with SQL-1999. It is not fully implemented in any RDBMS. ...
db_ch4
... select branch-name, count (distinct customer-name) from depositor, account where depositor.account-number = account.account-number group by branch-name Note: Attributes in select clause outside of aggregate functions must appear in group by list ...
... select branch-name, count (distinct customer-name) from depositor, account where depositor.account-number = account.account-number group by branch-name Note: Attributes in select clause outside of aggregate functions must appear in group by list ...
ppt
... A lock manager can be implemented as a separate process to which transactions send lock and unlock requests The lock manager replies to a lock request by sending a lock grant messages (or a message asking the transaction to roll back, in case of a deadlock) The requesting transaction waits until its ...
... A lock manager can be implemented as a separate process to which transactions send lock and unlock requests The lock manager replies to a lock request by sending a lock grant messages (or a message asking the transaction to roll back, in case of a deadlock) The requesting transaction waits until its ...
mod-16
... A lock manager can be implemented as a separate process to which transactions send lock and unlock requests The lock manager replies to a lock request by sending a lock grant messages (or a message asking the transaction to roll back, in case of a deadlock) The requesting transaction waits until its ...
... A lock manager can be implemented as a separate process to which transactions send lock and unlock requests The lock manager replies to a lock request by sending a lock grant messages (or a message asking the transaction to roll back, in case of a deadlock) The requesting transaction waits until its ...
Chapter 15: Concurrency Control
... causes T4 to wait for T3 to release its lock on B, while executing lock-X(A) causes T3 to wait for T4 to release its lock on A. Such a situation is called a deadlock. To handle a deadlock one of T3 or T4 must be rolled back and its locks released. ...
... causes T4 to wait for T3 to release its lock on B, while executing lock-X(A) causes T3 to wait for T4 to release its lock on A. Such a situation is called a deadlock. To handle a deadlock one of T3 or T4 must be rolled back and its locks released. ...
An Adaptive Replication Environment for a Relational Database
... considerable loss of revenue due to data unavailability. If a database that stores all data of a company goes down, critical information can be lost or become inaccessible so it cause significant damage. In order to deal with data unavailability and its consequence and also to overcome the potential ...
... considerable loss of revenue due to data unavailability. If a database that stores all data of a company goes down, critical information can be lost or become inaccessible so it cause significant damage. In order to deal with data unavailability and its consequence and also to overcome the potential ...
SQL Server Replication
... understand this white paper if you have some experience with one or both of these technologies, and have at least a rudimentary knowledge of database concepts such as transactions. The information about architecture and Publisher failover are valid for SQL Server 2005; however, the section on Subscr ...
... understand this white paper if you have some experience with one or both of these technologies, and have at least a rudimentary knowledge of database concepts such as transactions. The information about architecture and Publisher failover are valid for SQL Server 2005; however, the section on Subscr ...
Expert Oracle Database 11g Administration
... If you're fortunate enough to be associated with an application during its design stages, you can improve performance by performing several steps, including choosing automatic space management and setting correct storage options for your tables and indexes. Sizing the table and indexes correctly doe ...
... If you're fortunate enough to be associated with an application during its design stages, you can improve performance by performing several steps, including choosing automatic space management and setting correct storage options for your tables and indexes. Sizing the table and indexes correctly doe ...
Teradyne CTS TPS Database - Worcester Polytechnic Institute
... the creation or changes of Test Program Sets (TPSs). Teradyne uses TPSs to adapt their Spectrum Common Test System (CTS) to different airplane parts. Teradyne must constantly verify that their TPSs align with the parts they are designed to test. It is the logs of this verification process which the ...
... the creation or changes of Test Program Sets (TPSs). Teradyne uses TPSs to adapt their Spectrum Common Test System (CTS) to different airplane parts. Teradyne must constantly verify that their TPSs align with the parts they are designed to test. It is the logs of this verification process which the ...
SQL Server Replication: Providing High Availability using Database
... physical server in a different location. One server instance serves the database to clients (the principal server). The other instance acts as a hot or warm standby server (the mirror server), depending on the configuration of the database mirroring session and the mirroring state of the mirrored da ...
... physical server in a different location. One server instance serves the database to clients (the principal server). The other instance acts as a hot or warm standby server (the mirror server), depending on the configuration of the database mirroring session and the mirroring state of the mirrored da ...
(A) R
... Normalization Using Functional Dependencies When we decompose a relation schema R with a set of functional dependencies F into R1, R2,.., Rn we want Lossless-join decomposition: Otherwise decomposition would result in ...
... Normalization Using Functional Dependencies When we decompose a relation schema R with a set of functional dependencies F into R1, R2,.., Rn we want Lossless-join decomposition: Otherwise decomposition would result in ...
transaction
... execution will have a commit instructions as the last statement (will be omitted if it is obvious) A transaction that fails to successfully complete its execution will have an abort instructions as the last statement (will be omitted if it is obvious) ...
... execution will have a commit instructions as the last statement (will be omitted if it is obvious) A transaction that fails to successfully complete its execution will have an abort instructions as the last statement (will be omitted if it is obvious) ...
Database Design
... with relationships between the records (Rowley) – Bibliographic, statistical, business data, images, etc. IS 202 – FALL 2002 ...
... with relationships between the records (Rowley) – Bibliographic, statistical, business data, images, etc. IS 202 – FALL 2002 ...
accessing databases with jdbc - Core Servlets and JavaServer Pages
... In Section 17.4 (Using Prepared Statements), we discuss prepared statements, which let you execute similar SQL statements multiple times; this can be more efficient than executing a raw query each time. In Section 17.5 (Creating Callable Statements), we examine callable statements. Callable statemen ...
... In Section 17.4 (Using Prepared Statements), we discuss prepared statements, which let you execute similar SQL statements multiple times; this can be more efficient than executing a raw query each time. In Section 17.5 (Creating Callable Statements), we examine callable statements. Callable statemen ...
ch15old
... Implementation of Atomicity and Durability The recovery-management component of a database system ...
... Implementation of Atomicity and Durability The recovery-management component of a database system ...
PL SQL - College of Computing & Informatics
... PL/SQL Block Syntax and Guidelines •Identifiers –Can contain up to 30 characters –Cannot contain reserved words unless enclosed in double quotation marks –Must begin with an alphabetic character –Should not have the same name as a database table column name ...
... PL/SQL Block Syntax and Guidelines •Identifiers –Can contain up to 30 characters –Cannot contain reserved words unless enclosed in double quotation marks –Must begin with an alphabetic character –Should not have the same name as a database table column name ...
EDB Postgres Migration Guide
... 6. Confirm the results of the data migration and resolve any problems reported in the migration summary. 7. Convert applications to work with the newly migrated Postgres database. Applications that use open standard connectivity such as JDBC or ODBC normally only require changes to the database conn ...
... 6. Confirm the results of the data migration and resolve any problems reported in the migration summary. 7. Convert applications to work with the newly migrated Postgres database. Applications that use open standard connectivity such as JDBC or ODBC normally only require changes to the database conn ...
Oracle Database
Oracle Database (commonly referred to as Oracle RDBMS or simply as Oracle) is an object-relational database management system produced and marketed by Oracle Corporation.Larry Ellison and his two friends and former co-workers, Bob Miner and Ed Oates, started a consultancy called Software Development Laboratories (SDL) in 1977. SDL developed the original version of the Oracle software. The name Oracle comes from the code-name of a CIA-funded project Ellison had worked on while previously employed by Ampex.