Postgres SQL 如何在 SQL 数据库上透视表

Question

Please help how to create sql query from this:

Like Pivot function in excel

Thank you

Answer 1

You can do conditional aggregation. The logic is:

select
    date,
    docnumber,
    source,
    doctype,
    notes,
    sum(total) where(account = 'Creditors') creditors,
    sum(total) where(account = 'GST') gst,
    sum(total) where(account = 'Expenses') expenses
from mytable 
group by
    date,
    docnumber,
    source,
    doctype,
    notes