Show month as a row postgresql - postgresql

Question

I have this table, i call it transaction table
id periode_month total_amount
U1 1 1000
U1 2 1200
U1 3 1000
U1 4 1000
U2 2 1250
I'm trying to achieve this
id month 1 month 2 month 3 month 4 month 5 ... month 12
U1 1000 1200 1000 1000 0 0
U2 0 1250 0 0 0 0
Here is what i do so far
SELECT *
FROM crosstab(
'select client_id, periode_month, total_amount
from sucor_transactions
order by 1,2')
AS ct(userid VARCHAR, periode_month int, total_amount numeric);
my query above returning this error return and sql tuple descriptions are incompatible
then, i'm using google again and i found different query
SELECT *
FROM crosstab (
$$SELECT client_id, periode_month,"total_amount"
FROM sucor_transactions
ORDER BY 1,2$$
) AS t (
class int
-- "value" double precision -- column does not exist in result!
);
but it is returning this error return and sql tuple descriptions are incompatible. How can i solve my problem. thanks in advance

Answer 1

In crosstab, you need to user order by , and give the year column in double quotes
For filtering the month i used generate series.
CREATE EXTENSION IF NOT EXISTS tablefunc;
SELECT * FROM CROSSTAB (
'SELECT id,periode_month,total_amount
FROM crospost order by 1,2' ,'SELECT g FROM generate_series(1,12) g')
AS ct(id varchar , "month 1" int, "month 2" int, "month 3" int,
"month 4" int, "month 5" int, "month 6" int,
"month 7" int, "month 8" int, "month 9" int,
"month 10" int, "month 11" int, "month 12" int);