在PL/SQL中,可以使用以下方法來調用游標:
DECLARE
cursor_name SYS_REFCURSOR;
variable_name table_name.column_name%TYPE;
BEGIN
OPEN cursor_name FOR SELECT column_name FROM table_name;
LOOP
FETCH cursor_name INTO variable_name;
EXIT WHEN cursor_name%NOTFOUND;
-- 進行處理
END LOOP;
CLOSE cursor_name;
END;
BEGIN
FOR variable_name IN (SELECT column_name FROM table_name) LOOP
-- 進行處理
END LOOP;
END;
DECLARE
cursor_name SYS_REFCURSOR;
variable_name table_name.column_name%TYPE;
BEGIN
OPEN cursor_name FOR SELECT column_name FROM table_name;
IF cursor_name%ISOPEN THEN
-- 游標已經打開
END IF;
FETCH cursor_name INTO variable_name;
IF cursor_name%FOUND THEN
-- 從游標中獲取了數據
END IF;
CLOSE cursor_name;
END;
以上是一些常見的PL/SQL中調用游標的方法,具體使用哪種方法取決于具體的需求和情況。