I forgot to mention that the polygon data for the congressional districts in the table is ia CLOB and not SDO_GEOMETRY. Given a lat and long I want to find out which congressional district are those coordinates in.
Sorry for not being clear the first time.

Thanks
Vatsa

If you want to do spatial queries, you need to use sdo_geometry objects. You can convert the clob to a polygon dynamically in the query using the function sdo_util.from_wktgeometry

sdo_util.from_wktgeometry(your_clob_column)

Vatsa,
Besides the conversion functions provided by the SDO_UTIL package, you can also load GeoJSON data via Oracle Spatial Studio. It automatically creates SDO_GEOMETRY objects from your GeoJSON.
Then, simply use SDO_RELATE with mask=INSIDE/ANYINTERACT or SDO_INSIDE/SDO_ANYINTERACT get your containment question answered.
Karin

I converted the BLOB column to SDO_GEOMETRY using the function, but when I tried to plot the polygon using the converted column it does not draw the polygon. So, I am not sure if the conversion has happened correctly or if I am missing something.

Here is the table
PM_CONGRESSIONAL_DISTRICTS
ID NUMBER
GEOMETRY CLOB (Contains the polygon data for US congressional districts in GeoJSON format)
PARTY varchar2(1)
STATE varchar2(2)
DISTRICT Varcha2(200)
FIRSTNAME, LASTNAME, etc...

I converted the geometry column that is clob to SDO_GEOMETRY using the following query.

Select sdo_util.from_wktgeometry(GEOMETRY) as GEOM, ID, DISTRICT, FIRSTNAME, LASTNAME,
FROM PM_CONGRESSIONAL_DISTRICTS

When I tried to plot the conversted GEOM column on a map, it does not show on the map.
However, when I just use the CLOB column and use it as GeoJSON column, the polygon is showing up.