foreign key
... meaning to users and are usually hidden on forms, queries and reports • A surrogate key is often used in place of a composite primary key KROENKE and AUER - DATABASE CONCEPTS (4th Edition) © 2010, 2008 Pearson Prentice Hall ...
... meaning to users and are usually hidden on forms, queries and reports • A surrogate key is often used in place of a composite primary key KROENKE and AUER - DATABASE CONCEPTS (4th Edition) © 2010, 2008 Pearson Prentice Hall ...
A Workflow to Support Forensic Database Analysis
... This statement does not signal any transfer of copyright away from the author. ...
... This statement does not signal any transfer of copyright away from the author. ...
Read Chapter 3.1
... E is any relational-algebra expression G1, G2 …, Gn is a list of attributes on which to group (can be empty) Each Fi is an aggregate function Each Ai is an attribute name ...
... E is any relational-algebra expression G1, G2 …, Gn is a list of attributes on which to group (can be empty) Each Fi is an aggregate function Each Ai is an attribute name ...
Oracle to MySQL Migration
... Very early in the process (when automation tools are used), feedback and visibility become available regarding the migration. This is in direct contrast to a manual migration where many man hours may often be spent on tasks before realizing the migration process has encountered a pitfall and must ba ...
... Very early in the process (when automation tools are used), feedback and visibility become available regarding the migration. This is in direct contrast to a manual migration where many man hours may often be spent on tasks before realizing the migration process has encountered a pitfall and must ba ...
ppt - Avi Silberschatz
... average account balance is greater than $1200. select branch-name, avg-balance from (select branch-name, avg (balance) from account group by branch-name) as result (branch-name, avg-balance) where avg-balance > 1200 Note that we do not need to use the having clause, since we compute the temporary (v ...
... average account balance is greater than $1200. select branch-name, avg-balance from (select branch-name, avg (balance) from account group by branch-name) as result (branch-name, avg-balance) where avg-balance > 1200 Note that we do not need to use the having clause, since we compute the temporary (v ...
Fundamentals of Database Systems
... Relational Model Concepts The relational Model of Data is based on the concept of a Relation. A Relation is a mathematical concept based on the ideas of sets. The strength of the relational approach to data management comes from the formal foundation provided by the theory of relations. We ...
... Relational Model Concepts The relational Model of Data is based on the concept of a Relation. A Relation is a mathematical concept based on the ideas of sets. The strength of the relational approach to data management comes from the formal foundation provided by the theory of relations. We ...
SQL Slides
... average account balance is greater than $1200. select branch-name, avg-balance from (select branch-name, avg (balance) from account group by branch-name) as result (branch-name, avg-balance) where avg-balance > 1200 Note that we do not need to use the having clause, since we compute the temporary (v ...
... average account balance is greater than $1200. select branch-name, avg-balance from (select branch-name, avg (balance) from account group by branch-name) as result (branch-name, avg-balance) where avg-balance > 1200 Note that we do not need to use the having clause, since we compute the temporary (v ...
Physical Database Design
... How selective are these conditions likely to be? – The type of update (INSERT/DELETE/UPDATE), and the attributes that are affected. ...
... How selective are these conditions likely to be? – The type of update (INSERT/DELETE/UPDATE), and the attributes that are affected. ...
Inexact Querying of XML - Technion – Israel Institute of
... Eval-Dag-Query-AND-Semantics(Q,D) let v0< v1 < …< vk be a topological ordering of the nodes of Q let S0 = {(v0/root(D)} for i = 1 to k do Si = ; for each 2 Si-1 do E = { u2 D | © (vi/u) is an AND matching} if E = ; then Si = Si [ { © (vi/null)} else Si = Si [ { © (vi/u) | u2 E} ...
... Eval-Dag-Query-AND-Semantics(Q,D) let v0< v1 < …< vk be a topological ordering of the nodes of Q let S0 = {(v0/root(D)} for i = 1 to k do Si = ; for each 2 Si-1 do E = { u2 D | © (vi/u) is an AND matching} if E = ; then Si = Si [ { © (vi/null)} else Si = Si [ { © (vi/u) | u2 E} ...
ERStudio Data Architect - Embarcadero Technologies Product
... enterprise view of data assets, and assisting development with making informed decisions about how best to reuse elements pre-defined by the enterprise. Its powerful logical (non-database or technology specific) analysis and design environment helps to normalize and create an enterprise view of the ...
... enterprise view of data assets, and assisting development with making informed decisions about how best to reuse elements pre-defined by the enterprise. Its powerful logical (non-database or technology specific) analysis and design environment helps to normalize and create an enterprise view of the ...
R - Department of Computer Science
... Let r and s be relations on schemas R and S respectively.The result is a relation on schema R S which is obtained by considering each pair of tuples tr from r and ts from s. If tr and ts have the same value on each of the attributes in R S, a tuple t is added to the result, where t has the ...
... Let r and s be relations on schemas R and S respectively.The result is a relation on schema R S which is obtained by considering each pair of tuples tr from r and ts from s. If tr and ts have the same value on each of the attributes in R S, a tuple t is added to the result, where t has the ...
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... DB2 i Key Differences • Not a separate product – integrated into IBM i • i operating system uses DB2 for i and vice versa • Not a separate charge, but a few priced options ...
... DB2 i Key Differences • Not a separate product – integrated into IBM i • i operating system uses DB2 for i and vice versa • Not a separate charge, but a few priced options ...
Database Publishing in Adobe FrameMaker 11
... Engineering projects typically require extensive documentation. Engineering documents can be visually complex, including flow charts, schematics, and computer aided design (CAD) diagrams. Publishing tools used by engineering companies must effectively integrate complex graphics and text. Engineering ...
... Engineering projects typically require extensive documentation. Engineering documents can be visually complex, including flow charts, schematics, and computer aided design (CAD) diagrams. Publishing tools used by engineering companies must effectively integrate complex graphics and text. Engineering ...
Parallel Databases
... Prices of microprocessors, memory and disks have dropped sharply Recent desktop computers feature multiple processors and this trend is projected to accelerate Databases are growing increasingly large ...
... Prices of microprocessors, memory and disks have dropped sharply Recent desktop computers feature multiple processors and this trend is projected to accelerate Databases are growing increasingly large ...
Automatic Partitioning of Database Applications
... server and one that runs on the database server. These two programs communicate with each other as necessary to implement the original application’s semantics. Execution starts at the partitioned program on the application server but periodically switches to its counterpart on the database server, a ...
... server and one that runs on the database server. These two programs communicate with each other as necessary to implement the original application’s semantics. Execution starts at the partitioned program on the application server but periodically switches to its counterpart on the database server, a ...
Technical Comparison of Oracle Database 10g and SQL Server 2005
... issue an alert to forewarn the appropriate person — DBA — that the database is running out of space so that corrective measures can be taken. By default, Oracle will issue a warning alert when a tablespace is 85% full and a critical alert when it is 97% full. A DBA can override these defaults for a ...
... issue an alert to forewarn the appropriate person — DBA — that the database is running out of space so that corrective measures can be taken. By default, Oracle will issue a warning alert when a tablespace is 85% full and a critical alert when it is 97% full. A DBA can override these defaults for a ...
Integrity Constraints
... consistency. Thus, integrity constraints guard against accidental damage to the database. Database integrity refers to the validity and consistency of stored data. Integrity is usually expressed in terms of constraints, which are consistency rules that the database is not permitted to violate. Const ...
... consistency. Thus, integrity constraints guard against accidental damage to the database. Database integrity refers to the validity and consistency of stored data. Integrity is usually expressed in terms of constraints, which are consistency rules that the database is not permitted to violate. Const ...
Limiting Disclosure in Hippocratic Databases
... Measured performance of a query selecting all records from a 5 millionrecord table Compared performance of original and modified queries for varied choice ...
... Measured performance of a query selecting all records from a 5 millionrecord table Compared performance of original and modified queries for varied choice ...
Database Management Systems
... 1. Silberschatz, Korth and Sudharshan: Data base System Concepts, 5th Edition, Mc-GrawHill, 2006. ...
... 1. Silberschatz, Korth and Sudharshan: Data base System Concepts, 5th Edition, Mc-GrawHill, 2006. ...
ch4 - My FIT
... Data warehousing software can be purchased for maintaining summary data. Databases provide built-in support for replication. Encapsulation facilities can be used instead of triggers in many cases: • Define methods to update fields. • Carry out actions as part of the update methods instead of ...
... Data warehousing software can be purchased for maintaining summary data. Databases provide built-in support for replication. Encapsulation facilities can be used instead of triggers in many cases: • Define methods to update fields. • Carry out actions as part of the update methods instead of ...
relation - University of Windsor
... has a unique name, a unique number, and a particular employee who manages the department. We keep track of the start date when that employee began managing the department. A department may have several locations. 2. A department controls a number of projects, each of which has a unique name, a uniqu ...
... has a unique name, a unique number, and a particular employee who manages the department. We keep track of the start date when that employee began managing the department. A department may have several locations. 2. A department controls a number of projects, each of which has a unique name, a uniqu ...
®
... Smart Analytics System data warehouse. The paper covers how to ingest large volumes of extracted data into the data warehouse in preparation for analytical queries. This paper assumes that you have a working knowledge of DB2 software including partitioned databases. DB2 Database Version 9.7 fix pa ...
... Smart Analytics System data warehouse. The paper covers how to ingest large volumes of extracted data into the data warehouse in preparation for analytical queries. This paper assumes that you have a working knowledge of DB2 software including partitioned databases. DB2 Database Version 9.7 fix pa ...
IOSR Journal of Computer Engineering (IOSR-JCE)
... Existing database clients and tools make great efforts to help developers design and generate the query forms [2].They provide visual interfaces for developers to create or customize query forms. This system allows end-users to customize the existing query form at runtime. It provides a mechanism to ...
... Existing database clients and tools make great efforts to help developers design and generate the query forms [2].They provide visual interfaces for developers to create or customize query forms. This system allows end-users to customize the existing query form at runtime. It provides a mechanism to ...
Backup_and_Recovery
... are the result of an internal exception within the DBMS, an operating system failure, or other software-related database failure. In some cases, an instance failure can result in corruption of data that requires a recovery, but usually such failures do not damage data, so the DBMS simply needs to be ...
... are the result of an internal exception within the DBMS, an operating system failure, or other software-related database failure. In some cases, an instance failure can result in corruption of data that requires a recovery, but usually such failures do not damage data, so the DBMS simply needs to be ...
Chapter 18 - Java Database Connectivity (JDBC)
... 18.2.4 Distributed Database • Distributed database – Spread across computers in network – Data stored where frequently used • Available to all users ...
... 18.2.4 Distributed Database • Distributed database – Spread across computers in network – Data stored where frequently used • Available to all users ...