游标示例

SET SERVEROUTPUT  ON

DECLARE   —-声明变量和游标

v_product_id        products.product_id%TYPE;
v_name            products.name%TYPE;
v_price            products.price%TYPE;

CURSOR v_product_cursor  IS
select product_id, name, price
from products
order by product_id ;

BEGIN
—-打开游标
OPEN v_product_cursor;

LOOP
—-获取游标的列
FETCH    v_product_cursor
INTO  v_product_id, v_name, v_price ;

EXIT WHEN v_product_cursor%NOTFOUND ;

—-显示到屏幕上
DBMS_OUTPUT.PUT_LINUE(

’v_product_id='|| v_product||', v_name='||v_name||', v_price='||v_price

);

END LOOP;

CLOSE v_product_cursor ;

END;
/

====================================================================================

set serveroutput on

declare    —-声明变量和游标

v_product_id        products.product_id%type;
v_name            products.name%type;
v_price            products.price%type;

cursor        v_product_cursor is
select product_id, name, price
from products
order by product_id ;

begin
—-for循环输出到屏幕上
for v_product_cursor loop

dbms_output.put_line(

‘v_product_id=‘|| v_product_id||’,v_name=‘||v_name||’,v_price=‘||v_price

);
end loop;

end;
/