what is ref cursor in pl/sql?

Question Posted / swapna

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what is ref cursor in pl/sql?..

Answer / hitendra yadav

Reference cursor is as like pointer in C ad PASCAL language
which is point the data's memory location,REF CURSOR is
dynamic cursor which can be open for more then one query.
there are two type of ref cursof:-
(1) WEEK REF CURSOR:- ref cursor which not have return
cluse in defination.
(2) STRONG REF CURSOR :- ref cursor which use return cluse
in defination.

for example:-

SET serveroutput ON
DECLAR
TYPE eref REF CURSOR; -- WEEK REF CURSOR
eref1 eref;
erec employees%ROWTYPE;
BEGIN
OPEN eref1 FOR SELECT *
FROM employees
WHERE dept_id=90;
LOOP
FETCH eref1
INTO erec;
DBMS_OUTPUT.PUT_LINE(erec.emp_id);
EXIT WHEN eref1%NOTFOUND;
END LOOP;
END;

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what is ref cursor in pl/sql?..

Answer / swapna

A Reference Cursor is majorly used when we want to execute
a dynamic select statement causes to retrieve more than
one record. We can pass Reference cursor result as a out
parameter which can be used in other sub programs.

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what is ref cursor in pl/sql?..

Answer / suresh kumar somayajula

Re-usability of a cursor is nothing but " REF CURSOR".
It is of 2 types.
1. Weak REF Cursor
2. Strong REF Cursor.

SYNTAX:
1.Strong Refcursor
SYN: TYPE <TYPE_NAME> IS
REFCURSOR RETURN <RETURN_DATA_TYPE>
2.Weak Refcursor
SYN : TYPE <TYPE_NAME> IS
REFCURSOR

Thank you,
Suresh

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