www.techonthenet.com Open in urlscan Pro
64.40.117.204  Public Scan

Form analysis
0 forms found in the DOM

Text Content

Advertisements


 1. Home
 2. Oracle / PLSQL
 3. Functions

JavaScript is required for this website to work properly. Please re-enable
JavaScript in your browser settings.
 * Databases
 * SQL
 * Oracle / PLSQL
 * SQL Server
 * MySQL
 * MariaDB
 * PostgreSQL
 * SQLite

 * MS Office
 * Excel
 * Access
 * Word

 * Web Development
 * HTML
 * CSS
 * JavaScript
 * Color Picker

 * Programming
 * C Language

 * More
 * ASCII
 * Unicode
 * Linux
 * UNIX
 * Techie Humor

Advertisements




ORACLE BASICS

 * ALIASES
 * AND
 * AND & OR
 * BETWEEN
 * COMPARISON OPERATORS
 * DELETE
 * DISTINCT
 * EXISTS
 * FROM
 * GROUP BY
 * HAVING
 * IN
 * INSERT
 * INSERT ALL
 * INTERSECT
 * IS NOT NULL
 * IS NULL
 * JOIN
 * LIKE
 * MINUS
 * NOT
 * OR
 * ORDER BY
 * PIVOT
 * REGEXP_LIKE
 * SELECT
 * SUBQUERY
 * TRUNCATE
 * UNION
 * UNION ALL
 * UPDATE
 * WHERE


ORACLE ADVANCED

 * Alter Table
 * Alter Tablespace
 * Change Password
 * Check Constraints
 * Comments in SQL
 * Create Schema
 * Create Schema Statement
 * Create Table
 * Create Table As
 * Create Tablespace
 * Create User
 * Data Types
 * Declare Variables
 * Drop Table
 * Drop Tablespace
 * Drop User
 * Error Messages
 * Find Default Tablespace
 * Find Users
 * Find Users Logged In
 * Find Version Information
 * Functions
 * Global Temporary
 * Grant/Revoke Privileges
 * Indexes
 * Literals
 * Local Temporary
 * Primary Keys
 * Procedures
 * Roles
 * Sequences
 * Set Default Tablespace
 * Synonyms
 * System Tables
 * Unique Constraints
 * Views


ORACLE CURSORS

 * Close Cursor
 * Cursor Attributes
 * Declare Cursor
 * Fetch Cursor
 * Open Cursor
 * Select For Update
 * Where Current Of


ORACLE EXCEPTION HANDLING

 * Named Programmer-Defined Exception
 * Named System Exception
 * WHEN OTHERS Clause
 * SQLCODE
 * SQLERRM


ORACLE FOREIGN KEYS

 * Disable Foreign Key
 * Drop Foreign Key
 * Enable Foreign Key
 * Foreign Key
 * Foreign Key (cascade delete)
 * Foreign Key (set null delete)


ORACLE LOOPS/CONDITIONALS

 * CURSOR FOR LOOP
 * EXIT
 * FOR LOOP
 * GOTO
 * IF-THEN-ELSE
 * LOOP
 * REPEAT UNTIL LOOP
 * WHILE LOOP


ORACLE TRANSACTIONS

 * Commit Transaction
 * Lock Table
 * Rollback Transaction
 * Set Transaction


ORACLE TRIGGERS

 * After Delete Trigger
 * After Insert Trigger
 * After Update Trigger
 * Before Delete Trigger
 * Before Insert Trigger
 * Before Update Trigger
 * Disable All Triggers
 * Disable Trigger
 * Drop Trigger
 * Enable All Triggers
 * Enable Trigger


STRING/CHAR FUNCTIONS

 * ASCII
 * ASCIISTR
 * CHR
 * COMPOSE
 * CONCAT
 * Concat with ||
 * CONVERT
 * DECOMPOSE
 * DUMP
 * INITCAP
 * INSTR
 * INSTR2
 * INSTR4
 * INSTRB
 * INSTRC
 * LENGTH
 * LENGTH2
 * LENGTH4
 * LENGTHB
 * LENGTHC
 * LOWER
 * LPAD
 * LTRIM
 * NCHR
 * REGEXP_INSTR
 * REGEXP_REPLACE
 * REGEXP_SUBSTR
 * REPLACE
 * RPAD
 * RTRIM
 * SOUNDEX
 * SUBSTR
 * TRANSLATE
 * TRIM
 * UPPER
 * VSIZE


NUMERIC/MATH FUNCTIONS

 * ABS
 * ACOS
 * ASIN
 * ATAN
 * ATAN2
 * AVG
 * BITAND
 * CEIL
 * COS
 * COSH
 * COUNT
 * EXP
 * FLOOR
 * GREATEST
 * LEAST
 * LN
 * LOG
 * MAX
 * MEDIAN
 * MIN
 * MOD
 * POWER
 * REGEXP_COUNT
 * REMAINDER
 * ROUND (numbers)
 * ROWNUM
 * SIGN
 * SIN
 * SINH
 * SQRT
 * SUM
 * TAN
 * TANH
 * TRUNC (numbers)


DATE/TIME FUNCTIONS

 * ADD_MONTHS
 * CURRENT_DATE
 * CURRENT_TIMESTAMP
 * DBTIMEZONE
 * EXTRACT
 * LAST_DAY
 * LOCALTIMESTAMP
 * MONTHS_BETWEEN
 * NEW_TIME
 * NEXT_DAY
 * ROUND (dates)
 * SESSIONTIMEZONE
 * SYSDATE
 * SYSTIMESTAMP
 * TRUNC (dates)
 * TZ_OFFSET


CONVERSION FUNCTIONS

 * BIN_TO_NUM
 * CAST
 * CHARTOROWID
 * FROM_TZ
 * HEXTORAW
 * NUMTODSINTERVAL
 * NUMTOYMINTERVAL
 * RAWTOHEX
 * TO_CHAR
 * TO_CLOB
 * TO_DATE
 * TO_DSINTERVAL
 * TO_LOB
 * TO_MULTI_BYTE
 * TO_NCLOB
 * TO_NUMBER
 * TO_SINGLE_BYTE
 * TO_TIMESTAMP
 * TO_TIMESTAMP_TZ
 * TO_YMINTERVAL


ANALYTIC FUNCTIONS

 * CORR
 * COVAR_POP
 * COVAR_SAMP
 * CUME_DIST
 * DENSE_RANK
 * FIRST_VALUE
 * LAG
 * LAST_VALUE
 * LEAD
 * LISTAGG
 * NTH_VALUE
 * RANK
 * STDDEV
 * VAR_POP
 * VAR_SAMP
 * VARIANCE


ADVANCED FUNCTIONS

 * BFILENAME
 * CARDINALITY
 * CASE
 * COALESCE
 * DECODE
 * EMPTY_BLOB
 * EMPTY_CLOB
 * GROUP_ID
 * LNNVL
 * NANVL
 * NULLIF
 * NVL
 * NVL2
 * SYS_CONTEXT
 * UID
 * USER
 * USERENV

--------------------------------------------------------------------------------


ORACLE / PLSQL: INSTR FUNCTION

This Oracle tutorial explains how to use the Oracle/PLSQL INSTR function with
syntax and examples.


DESCRIPTION

The Oracle/PLSQL INSTR function returns the location of a substring in a string.


SYNTAX

The syntax for the INSTR function in Oracle/PLSQL is:

INSTR( string, substring [, start_position [, th_appearance ] ] )


PARAMETERS OR ARGUMENTS

string The string to search. string can be CHAR, VARCHAR2, NCHAR, NVARCHAR2,
CLOB, or NCLOB. substring The substring to search for in string. substring can
be CHAR, VARCHAR2, NCHAR, NVARCHAR2, CLOB, or NCLOB. start_position Optional.
The position in string where the search will start. If omitted, it defaults to
1. The first position in the string is 1. If the start_position is negative, the
INSTR function counts back start_position number of characters from the end of
string and then searches towards the beginning of string. nth_appearance
Optional. The nth appearance of substring. If omitted, it defaults to 1.


RETURNS

The INSTR function returns a numeric value. The first position in the string is
1.
If substring is not found in string, then the INSTR function will return 0.
If string is NULL, then the INSTR function will return NULL.
If substring is NULL, then the INSTR function will return NULL.


NOTE

 * See also the REGEXP_INSTR function.


APPLIES TO

The INSTR function can be used in the following versions of Oracle/PLSQL:

 * Oracle 12c, Oracle 11g, Oracle 10g, Oracle 9i, Oracle 8i


EXAMPLE

Let's look at some Oracle INSTR function examples and explore how to use the
INSTR function in Oracle/PLSQL.

For example:

INSTR('Tech on the net', 'e')
Result: 2   (the first occurrence of 'e')

INSTR('Tech on the net', 'e', 1, 1)
Result: 2   (the first occurrence of 'e')

INSTR('Tech on the net', 'e', 1, 2)
Result: 11  (the second occurrence of 'e')

INSTR('Tech on the net', 'e', 1, 3)
Result: 14  (the third occurrence of 'e')

INSTR('Tech on the net', 'e', -3, 2)
Result: 2

Share on:


Advertisements



Home | About Us | Contact Us | Testimonials | Donate



While using this site, you agree to have read and accepted our Terms of Service
and Privacy Policy.

Copyright © 2003-2022 TechOnTheNet.com. All rights reserved.