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;

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

Similar codes

36 votes216 views3 answers
Add column in mysq
SQL
4 votes204 views2 answers
Show all database inside postgresql
SQL
5 votes192 views1 answer
Postgresql functions
SQL
0 vote208 views1 answer
Mysql join table with a text columns with ids splited by char
SQL
3 votes203 views2 answers
See mysql users ubuntu
SQL
2 votes177 views3 answers
Access denied for user 'root'@'localhost' mariadb
SQL
2 votes190 views1 answer
Oracle trace file
SQL
4 votes189 views1 answer
Oracle user tables
SQL
0 vote206 views1 answer
SQL SELECT TOP Equivalent in MySQL
SQL
0 vote205 views1 answer
Mysql set variable to today's date
SQL