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Duplicates can be eliminated from a query result. jao=# select x from dups_ok; x ----- 100 100 (2 rows) jao=# select distinct x from dups_ok; x ----- 100 (1 row)
jao=# select x from dups_ok; x ----- 100 100 (2 rows) jao=# select distinct x from dups_ok; x ----- 100 (1 row)