NO_DATA_FOUND和||变量组装和for循环的代码实例
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FOR i in 1 .. (JB_DIFF_COUNT - 1) loop SELECT DM_XZQH_PARENT INTO VI_SJ_XZQH_PARENT FROM DM_XZQH WHERE DM_XZQH = VI_SJ_XZQH_PARENT; END LOOP;