Joining 2 columns where 1 column has unique records and the other has duplicates - sql

Question

I have 2 column Risk_Geo_ID in one table which has duplicates and Geography_Identifier in other table which has unique records. Doing an inner join is giving me duplicate records and cannot process this query in cube as Geography_Identifier is a PK and its unique. Need a query to get unique records.
Here is the Code:
SELECT
s.Geography_Identifier
,s.State_Code
,s.State_Name
,s.County_Name
,s.City_Name
,s.ZIP_Code
,a.Risk_ID
,a.Risk_Address
,a.Latitude
,a.Longitude
,a.Distance_to_Coast
,a.Insurance_Score
FROM [Policy].[Dim_Risk] AS a
INNER JOIN [Policy].[Fact_Monthly_Policy_Snap] AS b
ON b.Risk_ID = a.Risk_ID
AND b.Insurance_score = a.Insurance_Score
INNER JOIN [Common].[Dim_Geography] AS s
ON b.Risk_Geo_ID = s.Geography_Identifier

Answer 1

Try using the distinct
SELECT
distinct s.Geography_Identifier
,s.State_Code
,s.State_Name
,s.County_Name
,s.City_Name
,s.ZIP_Code
,a.Risk_ID
,a.Risk_Address
,a.Latitude
,a.Longitude
,a.Distance_to_Coast
,a.Insurance_Score
FROM [Policy].[Dim_Risk] AS a
INNER JOIN [Policy].[Fact_Monthly_Policy_Snap] AS b
ON b.Risk_ID = a.Risk_ID
AND b.Insurance_score = a.Insurance_Score
INNER JOIN [Common].[Dim_Geography] AS s
ON b.Risk_Geo_ID = s.Geography_Identifier

Answer 2

Try to use CROSS APPLY with TOP 1 if you want to get just one row with such ID:
SELECT
q.Geography_Identifier
,s.State_Code
,s.State_Name
,s.County_Name
,s.City_Name
,s.ZIP_Code
,a.Risk_ID
,a.Risk_Address
,a.Latitude
,a.Longitude
,a.Distance_to_Coast
,a.Insurance_Score
FROM [Policy].[Dim_Risk] AS a
INNER JOIN [Policy].[Fact_Monthly_Policy_Snap] AS b
ON b.Risk_ID = a.Risk_ID
AND b.Insurance_score = a.Insurance_Score
CROSS APPLY
(
SELECT
TOP 1
*
FROM [Common].[Dim_Geography] AS s
WHERE s.Geography_Identifier = b.Risk_Geo_ID
)q