How to Declare an Array in PL/SQL Oracle

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PL/SQL language extends a set of the standard Structure Query Language (SQL) statements in Oracle application programs. The PL/SQL procedure includes the DECLARE statement that allows you to define variables of the different types of data stored in user databases, including a group of elements of the same type, such as lists and arrays. By declaring an array in PL/SQL procedure, you can point to a group of the database elements using a single name.

  • Click "Start" in Windows, and then click "SQL Management Console."

  • Type the following code in the open window:

    DECLARE

    TYPE integer_varray IS VARRAY(3) OF INTEGER;

    intArray INTEGER_VARRAY := integer_varray(NULL,NULL,NULL);

    BEGIN

    dbms_output.put_line('Varray initialized as nulls.');

    FOR i IN 1..3 LOOP

    dbms_output.put ('Integer Varray:'||i);

    dbms_output.put_line(':'||intArray(i));

    END LOOP;

    END;

  • Click "File" and then click "Save" to declare the "integer_varray" array data type in you PL/SQL procedure.

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