INSTR IN ORACLE 10G HOW TO

See Also: Table 2-10, 'Implicit Type Conversion Matrix' for more information on implicit conversion If the search is unsuccessful (if substring does not appear occurrence times after the position character of string), then the return value is 0. The return value is relative to the beginning of string, regardless of the value of position, and is expressed in characters. The default values of both position and occurrence are 1, meaning Oracle begins searching at the first character of string for the first occurrence of substring. The value returned is of NUMBER datatype.Р”В«oth position and occurrence must be of datatype NUMBER, or any datatype that can be implicitly converted to NUMBER, and must resolve to an integer. The value of occurrence must be positive.Р”В«oth string and substring can be any of the datatypes CHAR, VARCHAR2, NCHAR, NVARCHAR2, CLOB, or NCLOB. Occurrence is an integer indicating which occurrence of string Oracle should search for. If position is negative, then Oracle counts backward from the end of string and then searches backward from the resulting position. Position is an nonzero integer indicating the character of string where Oracle Database begins the search. INSTR calculates strings using characters as defined by the input character set. The function returns an integer indicating the position of the character in string that is the first character of this occurrence. The INSTR functions search string for substring. TRIM РІР‚вЂњ delete space or specified character from start, end or both of a string.Description of the illustration instr.gif SUBSTR РІР‚вЂњ extracts a sub-string from a string.

INSTR IN ORACLE 10G HOW TO

LetРІР‚в„ўs get some examples about Oracle INSTR and how to use it: SELECT INSTR('It is ',РІР‚в„ўsРІР‚в„ў)Р”Р‡ROM DUAL SELECT INSTR ('It is ', РІР‚в„ўsРІР‚в„ў, 1, 1)Р”Р‡ROM dual SELECT INSTR ('It is ', РІР‚в„ўsРІР‚в„ў, 1, 2)Р”Р‡ROM dual SELECT INSTR ('It is ', РІР‚в„ўsРІР‚в„ў, -1, 2) 'Reversed Instring'Р”Р‡ROM dual Similar functions to Oracle INSTR:

If appearance is omitted, then function default to 1 that means it will return the position of first appearance of sub-string.

If start_position is a negative number, then function starts from the end of character given and counts backwards.

If start_position is a positive number, then function starts from the beginning of character given.

If start_positionР’В is omitted, then function treats start_position as number of 1.

appearance The number of string appearance in the string NUMBER, or any data type that can be implicitly converted to NUMBER, and must resolve to an integer.

NUMBER, or any data type that can be implicitly converted to NUMBER, and must resolve to an integer. start_position The Position in string where the search start with. CHAR, VARCHAR2, NCHAR, NVARCHAR2, CLOB, or NCLOB. sub-string A sub-string that you want to search about. Syntax: INSTR( string, sub-string ] ) Name Description Data Types String A string or character to search inside. INSTR function Search for particular sub-string in string and then return the location of the string in number position. This tutorial explains how to use Oracle INSTR function with basic syntax and examples.

Similar functions to Oracle INSTR: Introduction.

Instr in oracle 10g