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Data Definition Language
Data Definition Language

... A critical design feature of database management systems is the safeguarding of data in the event of a system failure. All commercial databases achieve the high standard of recovery the database to the last committed transaction. Logging is the mechanism by which Oracle creates redo logs, two or mor ...
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cs764 project report - Pages - University of Wisconsin–Madison
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... waits for acknowledgment from the Standby database. ▶ Maximum Availability – Keyword: P1 = Availability: Zero data loss protect as a very close P2. It requires SYNC redo transport, thus Primary database performance may be impacted by the amount of time required to receive an acknowledgment from the ...
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Database

A database is an organized collection of data. It is the collection of schemes, tables, queries, reports, views and other objects.The data is typically organized to model aspects of reality in a way that supports processes requiring information, such as modelling the availability of rooms in hotels in a way that supports finding a hotel with vacancies.A database management system (DBMS) is a computer software application that interacts with the user, other applications, and the database itself to capture and analyze data. A general-purpose DBMS is designed to allow the definition, creation, querying, update, and administration of databases. Well-known DBMSs include MySQL, PostgreSQL, Microsoft SQL Server, Oracle, Sybase and IBM DB2. A database is not generally portable across different DBMSs, but different DBMS can interoperate by using standards such as SQL and ODBC or JDBC to allow a single application to work with more than one DBMS. Database management systems are often classified according to the database model that they support; the most popular database systems since the 1980s have all supported the relational model as represented by the SQL language. Sometimes a DBMS is loosely referred to as a 'database'.
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