PL / SQL有什么区别： CREATE OR REPLACE FUNCTION WBAR_TEST_1 RETURN NUMBER IS LN_TMP NUMBER;BEGIN LN_TMP := SOME_SEQUENCE.NEXTVAL; RETURN LN_TMP;END WBAR_TEST_1; 和 CREATE OR REPLACE FUNCTION WBAR_TEST_2 RETURN NUMBER IS LN_TMP NUMBER;BEG