query without distinct returns only one row!

[Tao Wong]

 when i execute the following sql in kylin :

SELECT LOOKUP_1.COLUMN_1_NAME
 FROM USER_FACT as FACT_TABLE
INNER JOIN DIM_PHONE as LOOKUP_1
ON FACT_TABLE.COLUMN_1_ID = LOOKUP_1.COLUMN_1_ID AND
FACT_TABLE.COLUMN_2_ID = LOOKUP_1.COLUMN_2_ID ;

it returns with only one row.

but when i add DISTINCT after SELECT

it returns many rows (which is correct!)
has anyone encounter this ?


Thanks