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Oracle with Variable !
variable v_count_distinct number;
exec select count(CITY) - count(distinct CITY) into :v_count_distinct from STATION;
print v_count_distinct;
Weather Observation Station 4
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Oracle with Variable !
variable v_count_distinct number;
exec select count(CITY) - count(distinct CITY) into :v_count_distinct from STATION;
print v_count_distinct;