plsql left() function
SUBSTR( "20190601", 0, 6 )oracle leftmost characters
-- For Oracle only
-- syntax
SUBSTR(<main-string>,1,<number-of-characters>)
-- example
SUBSTR('Useless stuff',1,10) -- OUTPUT: Useless st
-- practical example
SELECT SUBSTR('Useless stuff',1,10)
FROM DUAL;oracle right characters
-- For Oracle only
-- syntax
SUBSTR(<main-string>,-<number-of-characters>)
-- example
SUBSTR('Useless stuff',-9) -- OUTPUT: ess stuff
-- practical example
SELECT SUBSTR('Useless stuff',-9)
FROM DUAL;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.*/Copyright © 2021 Codeinu
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