Combining data into a single cell while summing a seperate cell - sql

Question

I don't know how to word my question very well, so I will start with the data being returned:
prop_id | assessed_value | sale_id
35004 | 401200 | 1920831
35005 | 40500 | 1920831
35023 | 11300 | 1920831
34380 | 139100 | 1915846
127959 | 286400 | 1915882
I would like it to return:
prop_id | assessed_value | sale_id
35004, 35005, 35023 | 453000(Sum of the 3 parcels) | 1920831
34380 | 139100 | 1915846
127959 | 286400 | 1915882
So my main goal is to combine all the parcels on the sale_id field into a string, but only when a sale id has multiple prop_id, and then sum up the assessed value of all those. This is the query I am using to get the first set of data...
select
pv1.[prop_id],
pv1.[assessed_val],
ld1.[sale_id]
from dbo.land_detail as ld1
join dbo.property_val as pv1 on
pv1.[prop_id] = ld1.[prop_id] and
pv1.[prop_val_yr] = ld1.[prop_val_yr] and
pv1.[sup_num] = ld1.[sup_num]
left join dbo.sale as sale1 on
sale1.[chg_of_owner_id] = ld1.[sale_id]
where
pv1.[prop_inactive_dt] is null
order by sale_id, prop_id
prop_id is of data type INT
assessed_val is of data type numeric(14,0)
sale_id is of data type INT

Answer 1

You can use WITH to create a temporary table then you can use STUFF() FOR XML PATH to concatenate the prop_id field into one row
WITH temp AS (
select pv1.[prop_id],
pv1.[assessed_val],
ld1.[sale_id],
sale1.[sl_price],
sale1.[sl_dt],
(pv1.[assessed_val]/NULLIF(sale1.[sl_price],0) as Ratio
from dbo.land_detail as ld1 with(nolock)
join dbo.property_val as pv1 with(nolock)
on pv1.[prop_id] = ld1.[prop_id]
and pv1.[prop_val_yr] = ld1.[prop_val_yr]
and pv1.[sup_num] = ld1.[sup_num]
left join dbo.sale as sale1 with(nolock)
on sale1.[chg_of_owner_id] = ld1.[sale_id]
where sale1.sl_dt <= '04/30/16'
and sale1.sl_dt >= '05/01/15'
and pv1.[sub_type] = 'r'
and pv1.[prop_val_yr] = 2016
and pv1.[prop_inactive_dt] is null
order by sale_id, prop_id
)
SELECT STUFF(( SELECT ', ' + CAST(prop_id AS VARCHAR)
FROM temp
WHERE sale_id = t.sale_id
FOR XML PATH(''),TYPE)
.value('.','NVARCHAR(MAX)'),1,2,'') AS parcels,
SUM(t.assessed_val) assessed_val,
t.sale_id,
t.sl_price,
t.sl_dt,
SUM(t.ratio) ratio
FROM temp t
GROUP BY t.sale_id,
t.sl_price,
t.sl_dt
ORDER BY t.sale_id DESC

Answer 2

Put everything into a temp table (#temp) as below. Then make a self join to select the values. There are several ways of doing concatenation using (SUFF(), XML PATH, etc). Search on the internet on how to concatenate rows into comma separated string refer to this link for example
select
pv1.[prop_id],
pv1.[assessed_val],
ld1.[sale_id],
sale1.[sl_price],
sale1.[sl_dt],
(pv1.[assessed_val]/sale1.[sl_price]) as Ratio
--------Temp Table------------
INTO #temp
------------------------------
from dbo.land_detail as ld1 with(nolock)
join dbo.property_val as pv1 with(nolock) on
pv1.[prop_id] = ld1.[prop_id] and
pv1.[prop_val_yr] = ld1.[prop_val_yr] and
pv1.[sup_num] = ld1.[sup_num]
left join dbo.sale as sale1 with(nolock) on
sale1.[chg_of_owner_id] = ld1.[sale_id]
where
sale1.sl_dt <= '04/30/16' and
sale1.sl_dt >= '05/01/15' and
pv1.[sub_type] = 'r' and
pv1.[prop_val_yr] = 2016 and
pv1.[prop_inactive_dt] is null
order by sale_id, prop_id