Create Implementing Balance Sheets in PostgreSQL.md

[dora-su]

A gallery entry on making balance sheets using PostgreSQL.

[pavanagrawal123]

This is pretty cool. Can you try implementing with the lag function, it'll make your code more concise!

[dora-su]

Hi!
Actually, I initially planned to use the lag function, however, I ran it on my table and it would always return the default value. Thus, I decided to use a temporary table even though it may not be the most efficient and concise. I'm not sure of the reason for why the lag function will not work for me. It'd be great if you could send some help since I'm quite new to this!
Thank you.

[pavanagrawal123]

Sure I can help out. What exact commands were you using with the lag function?

[pavanagrawal123]

I will also go ahead and accept the GCI task, right after you fix the title. The current title in the markdown file does not follow the hugo syntax. You can look on the example to see the correct format.

[dora-su]

Hi! I updated the title to match the table from the example. Let me know if it still needs fixing. Here is my original use of the lag function:

UPDATE "BalanceSheet" 
	SET "Balance" = (SELECT LAG ("Balance", 1, 0.0) OVER (ORDER BY "Date" ASC)) + "Credit (+)" - "Debit (-)"; 

Thanks!