Interview Questions Answers.ORG
Interviewer And Interviewee Guide
Interviews
Quizzes
Home
Quizzes
Interviews Databases Programming Interviews:BtrieveClipperData ModelingData StructuresDatabase AdministrationDatabase Administrator (DBA)Database AnalystDatabase DeveloperDB DevelopmentEDI/Data Integration ExpertFirebirdHierarchicalIBM DB2InformixJava DatabaseMariaDBMicrosoft Access DeveloperMongoDBMS SQL ServerMySQL ProgrammingNetworkNoSQLObject RelationalPostgrePostgreSQLProgressRDBMSRelationalSQLSQL AdministratorSQL and PL/SQLSQL Notification ServicesSQL server 2008SSRSStored ProcedureSybaseTeradata
Copyright © 2018. All Rights Reserved
RDBMS Interview Question:
What is ROWID?
Submitted by: AdministratorThe ROWID is a unique database-wide physical address for every row on every table. Once assigned (when the row is first inserted into the database), it never changes until the row is deleted or the table is dropped.
The ROWID consists of the following three components, the combination of which uniquely identifies the physical storage location of the row.
► Oracle database file number, which contains the block with the rows
► Oracle block address, which contains the row
► The row within the block (because each block can hold many rows)
The ROWID is used internally in indexes as a quick means of retrieving rows with a particular key value. Application developers also use it in SQL statements as a quick way to access a row once they know the ROWID
Submitted by: Administrator
The ROWID consists of the following three components, the combination of which uniquely identifies the physical storage location of the row.
► Oracle database file number, which contains the block with the rows
► Oracle block address, which contains the row
► The row within the block (because each block can hold many rows)
The ROWID is used internally in indexes as a quick means of retrieving rows with a particular key value. Application developers also use it in SQL statements as a quick way to access a row once they know the ROWID
Submitted by: Administrator
Copyright 2007-2024 by Interview Questions Answers .ORG All Rights Reserved.
https://InterviewQuestionsAnswers.ORG.
https://InterviewQuestionsAnswers.ORG.