一.域名和资源记录的定义 1.Name space definitions 2.资源记录定义(RR definitions) 2.1 格式 后面分析报文的时候详细解释. 2.2 类型值(TYPE values) 类型主要用在资源记录中,注意下面的值是QTYPE的一个子集. 类型 值和含义 A a host address NS an authoritative name server MD a mail destination (Obsole
错误信息: org.springframework.dao.DataIntegrityViolationException: StatementCallback; SQL [delete from table_a where union_id = 123456789;]; Field 'id' doesn't have a default value; nested exception is java.sql.BatchUpdateException: Field 'id' doesn't ha