PostGIS - Finding aggregated counts on dissolved polygons - count

Question

I have set this WITH query to get dissolved polygons where polygons overlap:
CREATE TABLE public.dissolve_intrsct AS
( WITH dissolved AS(
SELECT ST_Union(pt.geom) as geom, count(geom) as buff_ct,
count(pt.count) as intrsct_ct
FROM public.intrsct_buff as pt
)
SELECT (ST_DUMP(geom)).geom::geometry(POLYGON, 2263), intrsct_ct, buff_ct
FROM dissolved);
My output returns the geometry(good), but also returns the total count of all geometries before the query(59144) for both intrsct_buff and buff_ct
I want the query to return the number of polygons that were dissolved to create the new polygon. (i.e. If three polygons overlap, after this query I want buff_ct to return 3, along with intrsct_ct just returning the original count I had in public.intrsct_buff)

Answer 1

I found what needed to be done..
After creating this table and adding a PRIMARY KEY ID, I then used ST_Intersects to find where my dissolved polygons intersected with the original buffer, and counted the number of intersecting polygons.
See code below:
`
CREATE TABLE dissolve_ct AS(
SELECT ds.id, ds.geom, count(pt.geom) AS
buff_ct
FROM public.dissolve_intrsct as ds
LEFT JOIN public.intrsct_buff as pt
ON ST_Intersects(ds.geom, pt.geom)
GROUP BY ds.id
);
`