Oracle Database Architecture

 What is oracle database? Oracle database is a relational database Management system (RDBMS) that mange storage, organization and   retrieval of data. An Oracle Database consists of a database and at least one instance. Single Instance…

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substr() Function in SQL

SUBSTR This will be used to extract substrings.To  show the specific character of a string.It will return character values Syntax: substr (string, start_chr_count [, no_of_chars]) Example select substr('computer',2), substr('computer',2,5), substr('computer',3,7)…

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