SQL subquery in the AND statement - sql

Question

A couple problems.
Solved valid_from_tsp <> max(valid_from_tsp) - how can I get my query to filter based on not being the max date? This idea doesn't work The error being returned is: "Improper use of an aggregate function in a WHERE clause"
My second issue is when I run it without the date, I am returned a syntax error: Syntax error, expected something like 'IN' keyword or 'CONTAINS' keyword between ')' and ')'
What do you see that I don't? Thanks in advance
Edited Query
select
a.*,
b.coverage_typ_cde as stg_ctc
from P_FAR_BI_VW.V_CLAIM_SERVICE_TYP_DIM a
inner join (select distinct etl_partition_id, coverage_typ_cde from
P_FAR_STG_VW.V_CLAIM_60_POLICY_STG where row_Create_tsp > '2013-11-30 23:23:59')b
on (a.etl_partition_id = b.etl_partition_id)
where a.valid_from_tsp > '2013-11-30 23:23:59'
and a.coverage_typ_cde = ' '
and (select * from P_FAR_SBXD.T_CLAIM_SERVICE_TYP_DIM where service_type_id = 136548255
and CAST(valid_from_tsp AS DATE) <> '2014-03-14')
Trouble part: and (select * from P_FAR_SBXD.T_CLAIM_SERVICE_TYP_DIM where service_type_id = 136548255
and CAST(valid_from_tsp AS DATE) <> '2014-03-14')
I am trying to filter by the date on the service_type_id, and I am getting the error in question 2
As for sample data: This is kinda tricky, This query returns many thousands of rows of data. Currently when I do the inner join, I get a secondary unique index violation error. So I am trying to filter out everything but the more recent which could be under that violation (service_type_id is the secondary index)
If I bring back three rows with the service_type_id with three different valid_from_tsp timestamps, I only want to keep the newest one, and in the query, not return the other two.

Answer 1

I don't know about your second question, but your first error is due to using an aggregate function max in a where clause. I'm not really sure what you want to do here, but a quick fix is to replace max(valid_from_tsp) with a subquery that only returns the maximum value.

Answer 2

This is your query:
select a.*, b.coverage_typ_cde as stg_ctc
from P_FAR_BI_VW.V_CLAIM_SERVICE_TYP_DIM a inner join
(select distinct etl_partition_id, coverage_typ_cde
from P_FAR_STG_VW.V_CLAIM_60_POLICY_STG
where row_Create_tsp > '2013-11-30 23:23:59'
) b
on (a.etl_partition_id = b.etl_partition_id)
where a.valid_from_tsp > '2013-11-30 23:23:59' and
a.coverage_typ_cde = ' ' and
(select *
from P_FAR_SBXD.T_CLAIM_SERVICE_TYP_DIM
where service_type_id = 136548255 and
CAST(valid_from_tsp AS DATE) <> '2014-03-14'
);
In general, you cannot have a subquery just there in the where clause with no condition. Some databases might allow a scalar subquery in this context (one that returns one row and one column), but this isn't a scalar subquery. You can fix the syntax by using exists:
where a.valid_from_tsp > '2013-11-30 23:23:59' and
a.coverage_typ_cde = ' ' and
exists (select 1
from P_FAR_SBXD.T_CLAIM_SERVICE_TYP_DIM
where service_type_id = 136548255 and
CAST(valid_from_tsp AS DATE) <> '2014-03-14'
);