Oracle stored procedure help

Question

HI am new to stored procedure. Am using a dynamic sql with

select * from table into var

var is a variable.the var contains more than one value ,when i try to run the proc with inputs i get an error:

ORA-01422: exact fetch returns more than requested number of rows

Is there a way such that the variable can hold more than one row using dynamic sql.

Answer 1

Use collection variables:

DECLARE
        TYPE tt_int IS TABLE OF INTEGER;
        var tt_int;
BEGIN
        SELECT  id
        BULK COLLECT
        INTO    var
        FROM    table;
END;

Answer 2

You have to bulk collect the result set into a table of type if you're going to select multiple rows.

declare
    type record_type is table of <table_name>;
    var_records record_type;

begin

    select * 
    bulk collect into var_records
    from <table_name>;

end;
/

See also my answer to PL SQL how to select all columns

Answer 3

you can also return the results to a ref cursor

set serveroutput on
DECLARE 
  REFEXAMPLE SYS_REFCURSOR;
  VAR NUMBER ;
  col varchar2(50);
BEGIN
    OPEN REFEXAMPLE FOR --Here you open the cursor and fill it
    SELECT * 
      FROM (
        SELECT 1 VAR, 'a' COL FROM DUAL 
        UNION ALL
        SELECT 2 VAR, 'b' COL FROM DUAL 
        UNION ALL
        SELECT 3 VAR, 'c' COL FROM DUAL 
        UNION ALL
        SELECT 4 VAR, 'd' COL FROM DUAL 
        UNION ALL
        SELECT 5 VAR, 'e' COL FROM DUAL 
      ) EXAMPLETABLE ;


    DBMS_OUTPUT.PUT_LINE('var   ' || 'col');
    DBMS_OUTPUT.PUT_LINE('---------');
    LOOP
        FETCH REFEXAMPLE INTO VAR, col; --now loop through
        EXIT WHEN REFEXAMPLE%NOTFOUND;
            DBMS_OUTPUT.PUT_LINE(var || '     ' || col || '  ');
        END LOOP;
    CLOSE REFEXAMPLE;


end ;
/


var   col
---------
1     a  
2     b  
3     c  
4     D  
5     e  

Answer 4

You can use a table variable, which provides you with an in-memory table of your results. You declare a table variable similar to a standard variable:

declare @MyVar table (col1 col1type, col2 col2type, etc.)