File
... Union: The result of this operation includes all tuples that are either in r1 or in r2 or in both r1 and r2.Duplicate tuples are automatically eliminated. Intersection: The result of this relation includes all tuples that are in both r1 and r2. ...
... Union: The result of this operation includes all tuples that are either in r1 or in r2 or in both r1 and r2.Duplicate tuples are automatically eliminated. Intersection: The result of this relation includes all tuples that are in both r1 and r2. ...
Powerpoints
... This is an infrastructure as a service model VMs are available preconfigured, or users can supply their own images Can connect to on premises Active Directory and/or DNS via VPN connectivity As of June 2013—available freely for development use with MSDN subscription ...
... This is an infrastructure as a service model VMs are available preconfigured, or users can supply their own images Can connect to on premises Active Directory and/or DNS via VPN connectivity As of June 2013—available freely for development use with MSDN subscription ...
Database Management System`s 8.1 A database is an organized
... databases. Instead of records being stored in some sort of linked list of free-form records as in CODASYL, Codd's idea was to use a "table" of fixed-length records, with each table used for a different type of entity. A linked-list system would be very inefficient when storing "sparse" databases whe ...
... databases. Instead of records being stored in some sort of linked list of free-form records as in CODASYL, Codd's idea was to use a "table" of fixed-length records, with each table used for a different type of entity. A linked-list system would be very inefficient when storing "sparse" databases whe ...
references
... data can be done through the standard user interface of the chosen database management system. The serialization method in the framework can quickly produce a compact binary file, which stores the state of the whole application in one step. This is very useful when implementing functionalities like ...
... data can be done through the standard user interface of the chosen database management system. The serialization method in the framework can quickly produce a compact binary file, which stores the state of the whole application in one step. This is very useful when implementing functionalities like ...
Chapter 4
... – Foreign key: a non-key column or field in one table that links to a primary key in another table ...
... – Foreign key: a non-key column or field in one table that links to a primary key in another table ...
business intelligence in microsoft sql server 2008 application
... A data storage service of high performance, scalable for enormous quantities of data – this makes it the ideal choice for the consolidation of the business data from the entire enterprise into a central deposit of data for analysis and reporting A comprehensive platform for the extraction, transform ...
... A data storage service of high performance, scalable for enormous quantities of data – this makes it the ideal choice for the consolidation of the business data from the entire enterprise into a central deposit of data for analysis and reporting A comprehensive platform for the extraction, transform ...
03/22/13
... A deposit transaction that increments the balance by the wrong amount maintains the integrity constraint balance 0, but does not maintain the relation between the enterprise and database states ...
... A deposit transaction that increments the balance by the wrong amount maintains the integrity constraint balance 0, but does not maintain the relation between the enterprise and database states ...
12 Managing Flashback Data Archive
... Flashback Data Archive And DDLs • Possible to add columns to tracked tables • Automatically disallows any other DDL that invalidates history • Dropping and truncating a tables • Dropping or modifying a column ...
... Flashback Data Archive And DDLs • Possible to add columns to tracked tables • Automatically disallows any other DDL that invalidates history • Dropping and truncating a tables • Dropping or modifying a column ...
slides - UCLA Computer Science
... First exception: DB2 happens to allow a time of '24:00:00' for midnight. ('24:00:01' is not legal.) This is an extension that is probably best avoided, because it's not compatible with other DBMSs, and because it's hard to distinguish '1999-01-01 24:00:00' from '1999-01-02 00:00:00'. Nevertheless, i ...
... First exception: DB2 happens to allow a time of '24:00:00' for midnight. ('24:00:01' is not legal.) This is an extension that is probably best avoided, because it's not compatible with other DBMSs, and because it's hard to distinguish '1999-01-01 24:00:00' from '1999-01-02 00:00:00'. Nevertheless, i ...
ORM - Webcourse
... • How do we store BillingDetails in the database? • How do we represent the relationship between Client and BillingDetails? A foreign key can only point to one other table – CreditCard or BankAccount. ...
... • How do we store BillingDetails in the database? • How do we represent the relationship between Client and BillingDetails? A foreign key can only point to one other table – CreditCard or BankAccount. ...
- CSE PSTU
... a. an understanding of the needs for and uses of database management systems in business; b. an understanding of the context, phases and techniques for designing and building database information systems in business; c. an understanding of the components of a computerized database information system ...
... a. an understanding of the needs for and uses of database management systems in business; b. an understanding of the context, phases and techniques for designing and building database information systems in business; c. an understanding of the components of a computerized database information system ...
transaction
... chronological order in which instructions of concurrent transactions are executed ...
... chronological order in which instructions of concurrent transactions are executed ...
Oracle Application Express
... apps/reports; wizards Access to any table in database (with perms) Can customize processing with PL/SQL Powerful Interactive Reports for sorting/filtering results Can run on your SSB web server (DAD) ...
... apps/reports; wizards Access to any table in database (with perms) Can customize processing with PL/SQL Powerful Interactive Reports for sorting/filtering results Can run on your SSB web server (DAD) ...
CS-275 - Clackamas Community College
... Use of library and information resources is integrated into computer science certificate and degree programs in general education requirements and in computer science classes as relevant to the curriculum. Use of library and information resource is encouraged and students can access a variety of pro ...
... Use of library and information resources is integrated into computer science certificate and degree programs in general education requirements and in computer science classes as relevant to the curriculum. Use of library and information resource is encouraged and students can access a variety of pro ...
Object-Relational Features - Department of Computer and
... LOB Storage – BLOB and (N)CLOB columns are stored out-of-line. They require the CREATE TABLE statement include a LOB STORAGE clause to tell where the LOB segment is stored. BFILE columns are by their nature stored out-of-line. ...
... LOB Storage – BLOB and (N)CLOB columns are stored out-of-line. They require the CREATE TABLE statement include a LOB STORAGE clause to tell where the LOB segment is stored. BFILE columns are by their nature stored out-of-line. ...
Gaining the Performance Edge Using a Column
... is 4-6 times in this example. As another example, run length encoding is a technique that represents runs of data using counts, and this can be used to reduce the space needs for columns that maintain a limited set of values (such as flags or codes). For each column type and profile, specific indexi ...
... is 4-6 times in this example. As another example, run length encoding is a technique that represents runs of data using counts, and this can be used to reduce the space needs for columns that maintain a limited set of values (such as flags or codes). For each column type and profile, specific indexi ...
Key Relational and SQL Concepts
... A Data Manipulation Language (DML) is used to access the data in a database. A Data Control Language (DCL) is used to control access to the data in a database. ...
... A Data Manipulation Language (DML) is used to access the data in a database. A Data Control Language (DCL) is used to control access to the data in a database. ...
Database Triggers
... • On the Iseries, a program that is called when a program tries to insert, update or delete a database record • A trigger can be more complex than a ...
... • On the Iseries, a program that is called when a program tries to insert, update or delete a database record • A trigger can be more complex than a ...