sql 可重复执行（插入数据）

1.插入语句

INSERT

WHEN 　　(NOT EXISTS(SELECT * FROM 表名 WHERE 字段='xxx'))

THEN

INTO 表名("字段1","字段2","字段3","字段4","字段5") VALUES ('值1', '值2', '值3', '值4', '值5',)
SELECT * FROM DUAL;

--插入数据
DECLARE NUM NUMBER;
BEGIN
  SELECT COUNT(*) INTO NUM FROM 表名 WHERE 字段名='xxx';
  IF NUM=0 THEN
    INSERT INTO 表名 VALUES  ('值1','值2','值3','值4','值5');
  END IF;
 
  SELECT COUNT(*) INTO NUM FROM 表名 WHERE 字段名='xxx';
  IF NUM=0 THEN
   INSERT INTO 表名 VALUES  ('值1','值2','值3','值4','值5');
  END IF;
 
  SELECT COUNT(*) INTO NUM FROM 表名 WHERE 字段名='xxx';
  IF NUM=0 THEN
   INSERT INTO 表名 VALUES  ('值1','值2','值3','值4','值5');
  END IF;
END;
COMMIT;