How to split a string after specific character in SQL Server and update this value to specific column

Question

I have table with data 1/1 to 1/20 in one column. I want the value 1 to 20 i.e value after \'/\'(front slash) is updated into other column in same

Answer 1

Use CHARINDEX. Perhaps make user function. If you use this split often.
I would create this function:

CREATE FUNCTION [dbo].[Split]
(
    @String VARCHAR(max),
    @Delimiter varCHAR(1)
)
RETURNS TABLE 
AS
RETURN 
(
    WITH Split(stpos,endpos) 
    AS(
        SELECT 0 AS stpos, CHARINDEX(@Delimiter,@String) AS endpos
        UNION ALL
        SELECT endpos+1, CHARINDEX(@Delimiter,@String,endpos+1)
            FROM Split
            WHERE endpos > 0
    )
    SELECT 'INT_COLUMN' = ROW_NUMBER() OVER (ORDER BY (SELECT 1)),
        'STRING_COLUMN' = SUBSTRING(@String,stpos,COALESCE(NULLIF(endpos,0),LEN(@String)+1)-stpos)
    FROM Split
)
GO