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

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.*/

Source: hackerrank.com

ORACLE SUBSTRING SYNTAX

-- ORACLE SQL - Get the 2 digits at the right end of a string
SELECT SUBSTR('TN0001234567890345',-2) FROM DUAL;

Source: stackoverflow.com

Similar codes

0 vote155 views1 answer
Convert .mdf to .bak
SQL
1 vote169 views1 answer
Oracle sequence last_number
SQL
0 vote167 views1 answer
Create view in sql server that contain multiple select statements
SQL
5 votes157 views3 answers
Oracle list columns in schema
SQL
0 vote150 views1 answer
What is initial catalog in sql connection string
SQL
0 vote193 views1 answer
Enlever les doubles espaces dans les tables postgresql
SQL
1 vote158 views1 answer
Age postgres
SQL
2 votes149 views1 answer
Oracle find unusable indexes
SQL
0 vote153 views1 answer
Sql server select ignore dupplicates
SQL
40 votes229 views4 answers
PostgreSQL add column
SQL