Create a stored type which is visible to SQL and PL/SQL.

    
SQL> CREATE OR REPLACE TYPE NameList AS
  2    VARRAY(20) OF VARCHAR2(30);
  3  /

Type created.

SQL>
SQL> DECLARE
  2    -- This type is local to this block.
  3    TYPE DateList IS VARRAY(10) OF DATE;
  4
  5    -- We can create variables of both DateList and NameList here.
  6    v_Dates DateList;
  7    v_Names NameList;
  8  BEGIN
  9    NULL;
 10  END;
 11  /

PL/SQL procedure successfully completed.

SQL>
SQL>

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Create a stored type which is visible to SQL and PL/SQL. : Object « Object Oriented Database « Oracle PL / SQL

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