Monday 14 October 2013

SAS Scan Equivalent Implementation in SQL using CHARINDEX

//SQL SERVER
CREATE TABLE A 
(
     Name varchar(40) 
    );

INSERT INTO A
(Name)
VALUES
('1-nikhil-s-a--sada'),
('55--sunil-s-a--sada'),
('-2--asd-ww');


CHARINDEX(charachter, field)
SUBSTRING(field, tart position, length upto)

//To get 1st
CHARINDEX('-', Name)

//TO get 2nd
SELECT       CHARINDEX('-', Name, CHARINDEX('-', Name) + 1) 
from A

//TO GEt 3rd
SELECT  CHARINDEX('-', Name, CHARINDEX('-', Name, CHARINDEX('-', Name) + 1) + 1) 
from A

//TO GEt 4th
SELECT  CHARINDEX('-', Name, CHARINDEX('-', Name, CHARINDEX('-', Name, CHARINDEX('-', Name) + 1) + 1) + 1)
from A

//Length 3-2
SELECT  (CHARINDEX('-', Name, CHARINDEX('-', Name, CHARINDEX('-', Name) + 1) + 1)-CHARINDEX('-', Name, CHARINDEX('-', Name) + 1)) -1
from A

//Length 4-3
SELECT (CHARINDEX('-', Name, CHARINDEX('-', Name, CHARINDEX('-', Name, CHARINDEX('-', Name) + 1) + 1) + 1) - CHARINDEX('-', Name, CHARINDEX('-', Name, CHARINDEX('-', Name) + 1) + 1) ) -1 
from A

//To get string between 2 and 3rd '-'
select substring(Name,CHARINDEX('-', Name, CHARINDEX('-', Name) + 1)+1,(CHARINDEX('-', Name, CHARINDEX('-', Name, CHARINDEX('-', Name) + 1) + 1)-CHARINDEX('-', Name, CHARINDEX('-', Name) + 1)) -1)
from A

//To get string between 3 and 4th '-'
select substring(Name,CHARINDEX('-', Name, CHARINDEX('-', Name, CHARINDEX('-', Name) + 1) + 1)  +1 , (CHARINDEX('-', Name, CHARINDEX('-', Name, CHARINDEX('-', Name, CHARINDEX('-', Name) + 1) + 1) + 1) - CHARINDEX('-', Name, CHARINDEX('-', Name, CHARINDEX('-', Name) + 1) + 1) ) -1 )
from A

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