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Snippet Name: SUBSTR (SubString)

Description: The SUBSTR functions allow you to extract a substring from a string.


If start_position is 0, then substr treats start_position as 1 (ie: the first position in the string).

If start_position is a positive number, then substr starts from the beginning of the string.

If start_position is a negative number, then substr starts from the end of the string and counts backwards.

If length is a negative number, then substr will return a NULL value.

Also see:
» FUNCTIONS: Deterministic
» FUNCTIONS: Nested Functions
» FUNCTIONS: IF statement
» FUNCTIONS: date/time
» FUNCTIONS: Sample functions
» FUNCTIONS: Recompile
» FUNCTIONS: IN OUT parameter
» FUNCTIONS: with output parameters
» FUNCTIONS: with parameters
» FUNCTIONS: without parameters
» FUNCTIONS: Create function
» FUNCTIONS: special restrictions
» FUNCTIONS: System Privileges
» IN Function
» Built-In Functions: CASE
» Built-In Functions: DECODE
» SUBST and INSTR together
» INSTR (InString)
» String Functions: REVERSE
» String Functions: LENGTH
» String Functions: INSTR
» String Functions: CONCAT
» String Functions: CHAR
» String Functions: INITCAP
» String Functions: LOWER
» String Functions: UPPER

Comment: (none)

Language: PL/SQL
Highlight Mode: PLSQL
Last Modified: March 05th, 2009

SUBSTR( string, start_position, [ LENGTH ] )
-- string is the source string.
-- start_position is the position for extraction. The first 
-- position in the string is always 1.
-- length is optional. It is the number of characters to extract. 
-- If this parameter is omitted, substr will return the entire 
-- string.
SUBSTR('This is a test', 6, 2) -- would return 'is'
SUBSTR('This is a test string', 6) -- would return 'is a test string'

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