摘要:
1、UNION用的比较多 语法如下: select employee_id,job_id from employees union select employee_id,job_id from job_history 2、union all是直接连接,取到得是所有值,记录可能有重复。 语法如下: s 阅读全文
摘要:
thrift.transport.TTransport.TTransportException: Could not start SASL: Error in sasl_client_start (-4) SASL(-4): no mechanism available: No worthy mec 阅读全文