Best way to find some value from NUMBER TYPE TABLE

TYPE NT IS TABLE OF NUMBER;
NTa NT := NT(1,2,3,4);

What is the best way to find that number 7 (Seven) is exist in the list NTa or not.

Thanks and Regards,
SudeesSoftware DeveloperAsked:
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sdstuberCommented:
EXISTS checks to see if the "element" is in the collection, that is, is there a value at position 7, not if there is a value of 7 somewhere in the collection.

for example...

SQL> DECLARE
  2      TYPE nt IS TABLE OF NUMBER;
  3
  4      nta nt
  5              := nt(
  6                     10,
  7                     20,
  8                     30,
  9                     40,
 10                     50,
 11                     60,
 12                     70,
 13                     80,
 14                     90,
 15                     100
 16                 );
 17  BEGIN
 18      IF nta.EXISTS(7)
 19      THEN
 20          DBMS_OUTPUT.put_line('Found a value at position 7: ' || nta(7));
 21      END IF;
 22  END;
 23  /
Found a value at position 7: 70

PL/SQL procedure successfully completed.

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the correct way to check existence of specific values in a collection is use MEMBER OF

SQL> DECLARE
  2      TYPE nt IS TABLE OF NUMBER;
  3
  4      nta nt
  5              := nt(
  6                     4,
  7                     3,
  8                     1,
  9                     7,
 10                     2,
 11                     9,
 12                     6,
 13                     8,
 14                     5,
 15                     0
 16                 );
 17  BEGIN
 18      IF 7 MEMBER OF nta
 19      THEN
 20          DBMS_OUTPUT.put_line('Found a value 7 within collection');
 21      END IF;
 22  END;
 23  /
Found a value 7 within collection

PL/SQL procedure successfully completed.

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