how to Replace null with zero in pivot SQL query - sql-server

Question

I am trying to fetch Year wise and month wise sales like
select * from
(
select year(InvDt) as [Year], left(datename(Month,InvDt), 3) as [Month],
InvAmnt as Amount
from tblInvoice where TenantId =-xxxxxxxx
) as Inv
pivot
(sum(Amount) for [Month] in(Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep,
Oct, Nov, [Dec])) as pvt
But here so many null is coming so I want to replace these null with zero.
please help me.

Answer 1

create table tblInvoice (InvDt date, TenantId int, InvAmnt numeric)
insert into tblInvoice values ('20180601',1,1),('20180601',1,1),('20180601',1,1),('20180501',1,1), ('20180401',1,1)
SELECT Year
, COALESCE(Jan ,0) Jan
, COALESCE(Feb ,0) Feb
, COALESCE(Mar ,0) Mar
, COALESCE(Apr ,0) Apr
, COALESCE(May ,0) May
, COALESCE(Jun ,0) Jun
, COALESCE(Jul ,0) Jul
, COALESCE(Aug ,0) Aug
, COALESCE(Sep ,0) Sep
, COALESCE(Oct ,0) Oct
, COALESCE(Nov ,0) Nov
, COALESCE(Dec ,0) Dec
FROM ( SELECT YEAR(InvDt) AS Year
, LEFT(DATENAME(MONTH, InvDt), 3) AS Month
, InvAmnt AS Amount
FROM tblInvoice
WHERE TenantId = 1) AS Inv
PIVOT ( SUM(Amount)
FOR Month IN (Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec)) AS pvt;

Answer 2

So Answer is this but it's too long, something we must have another solution but I am not getting right now
select [Year], isnull(Jan, 0) as Jan,isnull(Feb,0) as Feb, isnull(Mar, 0) as
Mar, isnull(Apr, 0) as Apr, isnull(May,0) as May,
isnull(Jun,0) as Jun, isnull(Jul,0) as Jul, isnull(Aug,0) as Aug,
isnull(Sep,0) as Sep,isnull(Oct,0) as Oct, isnull(Nov,0) as Nov,
isnull([Dec],0) as Dec
from
(
select year(InvDt) as [Year], left(datename(Month,InvDt), 3) as [Month],
InvAmnt as Amount
from tblInvoice where TenantId =-xxxxxxx
) as Inv
pivot
(sum(Amount) for [Month] in(Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep,
Oct, Nov, [Dec])) as pvt
Thanks Mazhar by your solution my mind was opened and works this.

Answer 3

Just add a coalesce statement in a subquery to replace nulls on zero:
select * from
(
select year(InvDt) as [Year], left(datename(Month,InvDt), 3) as [Month],
coalesce(InvAmnt, 0) as Amount
from tblInvoice where TenantId =-xxxxxxxx
) as Inv
pivot
(sum(Amount) for [Month] in(Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep,
Oct, Nov, [Dec])) as pvt)