Get a row value based on criterias - T-SQL - sql-server

Question

Sample Data in Yellow the desired output
Just need your expert help on this.
I need to get the output based on T-SQL. Whenever the invoice_line_id_link is 0 put the product_id value if not look into the id column and get the product_id of that row.
Here's the script.
declare #t table
(id int, invoice_id int, product_id int, invoice_line_id_link int);
insert into #t values
(53,10,383,0),
(54,10,344,53),
(55,10,920,53),
(57,10,384,0),
(58,10,359,57),
(59,10,242,57),
(60,10,284,0);
select id, invoice_id, product_id,invoice_line_id_link, null desiredoutput from #t
based on the image if possible to populate using TSQL

Answer 1

Based on the image you have provided , here is the piece of code producing desired output.
Table Populate
declare #t table (id int, invoice_id int, product_id int, invoice_line_id_link int);
insert into #t values (53,10,383,0), (54,10,344,53), (55,10,920,53), (57,10,384,0), (58,10,359,57), (59,10,242,57), (60,10,284,0);
Code for Output
select *,CASE WHEN invoice_line_id_link = 0 THEN product_id
ELSE (select t1.product_id from #t t1 where t1.id = t2.invoice_line_id_link)
END from #t t2
Output
id invoice_id product_id invoice_line_id_link desiredoutput
53 10 383 0 383
54 10 344 53 383
55 10 920 53 383
57 10 384 0 384
58 10 359 57 384
59 10 242 57 384
60 10 284 0 284
*/