How to parse a string and create several columns from it?

Question

I have a varchar(max) field containing Name Value pairs, in every line I have Name UnderScore Value.

I need to do a query against it so that it returns

Answer 1

He is an example that you can use:

-- Creating table:
create table demo (dID int, dRec varchar(100));

-- Inserting records:
insert into demo (dID, dRec) values (1, 'BCQP1 Sam');
insert into demo (dID, dRec) values (2, 'BCQP2 LD');

-- Selecting fields to retrive records:
select * from demo;

Then I want to show in one single row both rows combined and display only the values from the left removing the name on the right side up to the space character.

    /*
    The STUFF() function puts a string in another string, from an initial position.  
    The LEFT() function returns the left part of a character string with the specified number of characters. 
    The CHARINDEX() string function returns the starting position of the specified expression in a character string. 
*/
SELECT 
 DISTINCT
   STUFF((SELECT ' ' + LEFT(dt1.dRec, charindex(' ', dt1.dRec) - 1) 
          FROM demo dt1
          ORDER BY dRec
          FOR XML PATH('')), 1, 1, '') [Convined values]
FROM demo dt2
--
GROUP BY dt2.dID, dt2.dRec
ORDER BY 1

As you can see here when you run the function the output will be:

BCQP1 BCQP2

On the top of the script I explained what each function is used for (STUFF(), LEFT(), CHARINDEX() functions) I also used DISTINCT in order to eliminate duplicate values.

NOTE: dt stands for "demo table", I used the same table and use two alias dt1 and dt2, and dRec stands for "demo Record"

If you want to learn more about STUFF() Function here is a link:

https://www.mssqltips.com/sqlservertip/2914/rolling-up-multiple-rows-into-a-single-row-and-column-for-sql-server-data/