Many times we get confused with Logical I/O and Physical I/O in Oracle Database. Logical I/O and Physical I/O is called Logical reads and Physical reads respectively I am trying to clear all the doubt about what is Logical read in oracle and Physical I/O in Oracle Database What is Logical I/O (LIO) in Oracle It is […]
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SubQueries in Oracle (1) A Subquery or Nested query is a query within another SQL query and embedded within the WHERE clause. A subquery is a query within a query (2) A subquery is used to return data that will be used in the main query as a condition to further restrict the data to
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We can move file or directory from one location to another location in Linux using mv command . This command can also be used to rename the file or directory also.This is a quite a useful command. mv – move files(s) /dirs Options: – -f mv will move the file(s) without prompting even if it
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In continuation of our series of Linux tutorial,I am here presenting the Compress and Uncompress command in Linux Compress,Uncompress command compress – The compress utility will attempt to reduce the size of the named files. File will be replaced by one with the extension .Z, while keeping the same ownership modes, change times and modification times.
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In continuation of our series of Unix tutorial ,i am here presenting article on how to tar a directory in Linux.Topics included in this are how to tar a directory in Linux, tar compress directory command, tar gzip command,how to extract and list files from tar file ,GNU tar command tar – create tape archives
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The GNU tar command included with Linux distributions has integrated compression(.gz) .It can create a .tar archive and then compress it with gzip or bzip2 compression in a single command. The resulting file is a .tar.gz file or .tar.bz2 file. we will learn about how to create ,List and unzip Tar.gz file in Linux How to create
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