oracle pl sql loop循环_oracle for in loop

CREATE TABLE TB_USER
(
    ID INTEGER PRIMARY KEY,
    USER_NAME VARCHAR2(20) NOT NULL,
    USER_AGE INTEGER NOT NULL
);

CREATE SEQUENCE SEQ_USER
INCREMENT BY 1
START WITH 1
NOMAXVALUE
NOCYCLE
CACHE 10;

CREATE OR REPLACE TRIGGER TR_USER BEFORE INSERT ON TB_USER FOR EACH ROW
BEGIN
    SELECT SEQ_USER.NEXTVAL INTO :NEW.ID FROM DUAL;
END;

DECLARE
V_AGE TB_USER.USER_AGE%TYPE;
V_NAME TB_USER.USER_NAME%TYPE;
V_COUNT INTEGER:=0;
BEGIN
  LOOP
    SELECT DBMS_RANDOM.value(1, 100) INTO V_AGE FROM DUAL;
    V_NAME := 'USER_' || V_AGE;
    INSERT INTO TB_USER(USER_NAME, USER_AGE) VALUES (V_NAME, V_AGE);
    EXIT WHEN V_COUNT = 100;
    V_COUNT := V_COUNT+1;
  END LOOP;
  COMMIT;
END;