Subtr Oracle ?

Oracle substring

-- ORACLE substr(string, start, [, length ])
SELECT substr('Hello World', 4, 5) FROM DUAL;       -- lo Wo
SELECT substr('Hello World', 4) FROM DUAL;          -- lo World
SELECT substr('Hello World', -3) FROM DUAL;         -- rld
SELECT substr('Hello World', -3, 2) FROM DUAL;      -- rl

Subtr Oracle ?

/*Using SUBSTR in Oracle (Example from hackerrank.com): */

/*Simple select query...*/ 
SELECT DISTINCT city 
FROM station 

/*Using WHERE and SUBSTR to find (distinct) cities in station table that begin 
as well as end with a vowel.*/ 
WHERE SUBSTR(city,1,1) IN ('A','E','I','O','U') 
	AND substr(city,-1) IN ('a','e','i','o','u'); 

/*Parameters for SUBSTR (Substring) in order are as follows: 
String, Start, Length.*/

Source: hackerrank.com

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