Differences between UNIQUE and DISTINCT in select statements
Answer Posted / apparao akki
Hi all,
plz find the below executed report on the same.
------------------------------------------------------
SQL> select * from person;
PERSON_ID FIRST_NAME LAST_NAME
TITLE_1 TITLE_2 SOCS
---------- --------------------- -------------------------
---------- ---------- -----------
9 ssss rrrrr
tttt gggg 67778-3
1 THUUTHTUT lofstrom
ba null 4940-343
1 ffsdf fsdfsd
fdsfsd fsdf 5454
1 THUUTHTUT lofstrom
ba null 4940-343
1 THUUTHTUT lofstrom
ba null 4940-343
1 appa akki
s/w btech 3i
2 rao
s/w kmm 3i
4 bunny neel
lkg ukg home
8 rows selected.
SQL> select unique(person_id),last_name from person;
PERSON_ID LAST_NAME
---------- -------------------------
2
1 lofstrom
4 neel
1 fsdfsd
9 rrrrr
1 akki
6 rows selected.
SQL> select distinct(person_id) from person;
PERSON_ID
----------
4
9
2
1
Is This Answer Correct ? | 9 Yes | 20 No |
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