2 independent left join queries won't work together - sql

Question

Ultimately I want my output to be a pivot query similar to below which I am comfortable doing
e.g.
Date CO RU ER AB
1/1/18 5 20 0 0
2/1/18 0 5 0 0
3/1/18 0 0 0 0
4/1/18 1 0 0 0
However, to get to that point I want to fill my data set with zero where no data exists
The table holds data similar to the following
Date/time Process_type Status
1/1/18 10:05 150 RU
2/1/18 14:00 150 CO
4/1/18 18:00 100 ER
On any given day there could be no processes.
I have written 2 queries whose purpose was to fill the gaps in the data. ie. fill days and statuses with zero counts where that combination does not exist.
This is a date range query that ensures zeroes are returned if the count is zero for dates where there is no info. This would give something similar to below
Date Count
1/1/18 25
2/1/18 5
3/1/18 0
4/1/18 1
This is a status query that ensures zeroes are returned if that zero is not status is not present
status count
AB 0
RU 2
CO 25
ER 0
I want to join the 2 queries so that I will get zeroes for both dates and status if the count is zero.
Date Status Count
1/1/18 AB 0
1/1/18 CO 0
1/1/18 ER 0
1/1/18 RU 0
2/1/18 AB 0
2/1/18 CO 6
3/1/18 ER 0
4/1/18 RU 1
When I join them up in Query 3 it wont run and gets the following error. I have tried a few different ways with no joy.
Error report -
SQL Error: ORA-00904: "TD"."TMP_DATE": invalid identifier
00000 - "%s: invalid identifier"
Query 1
--
-- Working out dates with nulls if zero count
--
with tmp_dates as (
select trunc(sysdate) - level + 1 as tmp_date
from dual
connect by level <= 5
)
select
count(pi.crtd_tstmp),
td.tmp_date
from
tmp_dates td
left join procedure_instance pi
on (td.tmp_date = trunc(pi.crtd_tstmp) and proc_oid = 150)
group by
td.tmp_date
order by
tmp_date;
Query 2
--
-- Working with Categories with zero if no category
--
with status_table as (
select 'CO' as instanceid from dual union
select 'RU' as instanceid from dual union
select 'ER' as instanceid from dual union
select 'AB' as instanceid from dual
)
select
count(pi.crtd_tstmp),
st.instanceid
from
status_table st
left join procedure_instance pi
on (st.instanceid = pi.stat and proc_oid = 150)
group by
st.instanceid
order by
st.instanceid;
Query 3
--
-- join together
--
with tmp_dates as (
select trunc(sysdate) - level + 1 as tmp_date
from dual
connect by level <= 5
),
status_table as (
select 'CO' as instanceid from dual union
select 'RU' as instanceid from dual union
select 'ER' as instanceid from dual union
select 'AB' as instanceid from dual
)
select
count(pi.crtd_tstmp),
td.tmp_date,
st.instanceid
from
tmp_dates td,
status_table st
left join procedure_instance pi
on (td.tmp_date = trunc(pi.crtd_tstmp) and proc_oid = 150)
left join procedure_instance pi
on (st.instanceid = pi.stat and proc_oid = 150)
group by
td.tmp_date,
st.instanceid
order by
tmp_date;

Answer 1

Maybe something like this with only one table in the from clause?
with tmp_dates as (
select trunc(sysdate) - level + 1 as tmp_date
from dual
connect by level <= 5
),status_table as (select 'CO' as instanceid from dual union
select 'RU' as instanceid from dual union
select 'ER' as instanceid from dual union
select 'AB' as instanceid from dual)
select count(pi.crtd_tstmp), td.tmp_date, st.instanceid
from tmp_dates td
left join procedure_instance pi on (td.tmp_date = trunc(pi.crtd_tstmp) and proc_oid = 150)
right join status_table st on (st.instanceid = pi.stat and proc_oid = 150)
group by td.tmp_date,st.instanceid
order by tmp_date;

Answer 2

I decided to get round this a different way, I used the pivot to fill the process statutes instead of using query 2 and the second join. Works exactly as wanted now.
select Process_created,
nvl(Complete, 0) as Complete,
nvl(Error, 0) as Error,
nvl(Running, 0) as Running,
nvl(Abort, 0) as Abort
from(
with tmp_dates as (
select trunc(sysdate) - level + 1 as tmp_date
from dual
connect by level <= 30
)
select
count(pi.crtd_tstmp) as number_of,
td.tmp_date as Process_created,
pi.stat as status
from
tmp_dates td
left join procedure_instance pi
on (td.tmp_date = trunc(pi.crtd_tstmp) and proc_oid = 150)
group by
td.tmp_date,pi.stat
order by
tmp_date)src
pivot(
sum(number_of)
for status in ('CO' as Complete, 'ER' as Error, 'RU' as Running, 'AB' as Abort )) piv order by process_created;

Answer 3

Try this and let me know what errors you get
--
-- join together
--
WITH tmp_dates
AS (
SELECT trunc(sysdate) - LEVEL + 1 AS tmp_date
FROM dual connect BY LEVEL <= 5
)
,status_table
AS (
SELECT 'CO' AS instanceid FROM dual
UNION
SELECT 'RU' AS instanceid FROM dual
UNION
SELECT 'ER' AS instanceid FROM dual
UNION
SELECT 'AB' AS instanceid FROM dual
)
SELECT count(pi.crtd_tstmp)
,td.tmp_date
,st.instanceid
FROM tmp_dates td
,status_table st
LEFT JOIN procedure_instance pi ON (
td.tmp_date = trunc(pi.crtd_tstmp)
AND proc_oid = 150
)
LEFT JOIN procedure_instance pi2 ON (
st.instanceid = pi2.stat
AND proc_oid = 150
)
GROUP BY td.tmp_date
,st.instanceid
ORDER BY td.tmp_date;