ip_assigned INET; ip_assigned := (COALESCE((SELECT ip FROM ips WHERE id = inp_id),a LEFT JOIN LATERAL (SELECT * FROM ips b WHERE a.ip < b.ip ORDER BY b.ip ASC LIMIT 1) AS q ON trueWHERE q.ip <> (a.ip +
我有一个疑问,在python中字符串是,Z = "00123+0567*29/03-7"甚至我后来也尝试过用re.split('[+]|[*]|-|/', Z)使用for i in res : i = i.lstrip("0"),但它将正确地拆分,但是要用与字符串"Z“中的操作数与Z = "123+567*29/3-7"相同的操作数连接。