执行mysql -e 时能否保持一个长连接？ 我有时候在linux shell写些针对于mysql数据库的操作，shell脚本要多次运行mysql -e，但这样的话，每次都要连接数据库，很浪费资源，有没有办法维持一个长连接并以后一直用这个长连接呢？ 解决方案 » 免费领取超大流量手机卡，每月29元包185G流量+100分钟通话, 中国电信官方发货 想直接用mysql -e来保持长连接不可以考虑别的方式吧 $ mysql test -e "select * from tb;desc user;show tables;"+------+------+| rid | con |+------+------+| 1 | NULL || 2 | NULL || 2 | NULL || 3 | NULL || 4 | NULL || 4 | NULL || 4 | NULL |+------+------++----------+----------------------+------+-----+---------+-----------| Field | Type | Null | Key | Default | Extra+----------+----------------------+------+-----+---------+-----------| userid | smallint(6) unsigned | NO | PRI | NULL | auto_incre| username | varchar(20) | NO | | NULL |+----------+----------------------+------+-----+---------+-----------+---------------------------+| Tables_in_test |+---------------------------+| a || animals || b || cmplcate || columns_priv || contest_skill || db || dd || event || feeder_update || forum || func || general_log || gss_documen_cate || gss_documentation || help_category || help_keyword || help_relation || help_topic || host || human_employee_master || item || ndb_binlog_index || notice || pet || plugin || proc || procs_priv || product || pyk || search || servers || shop || slow_log || stock || student || system_user || t || t1 || t2 || t7974 || t_edition || t_rank || ta || taa || tab || tables_priv || tb || test || text || time_zone || time_zone_leap_second || time_zone_name || time_zone_transition || time_zone_transition_type || treenodes || tt || tt1t || ttt || tttt || type || url || user || viewlog |+---------------------------+你可以向我这样执行多条语句 to_date 时间转换错误 关于innodb死锁的问题。 mysql如何按照月份分组排列 求一个mysql的sql语句。 用SQL语句创建一个表 请教＂No Database Selected＂的问题 关于对mysql数据库的大数据量访问！！ 下载mysql时，Source Code是什么平台？ 关于数据库表的设计问题 三天了没搞懂 java.sql.SQLException: Undeclared variable: 0 Query: MySQL多线程 如何用SQL语句得到本季度第一天的日期？？
考虑别的方式吧
+------+------+
| rid | con |
+------+------+
| 1 | NULL |
| 2 | NULL |
| 2 | NULL |
| 3 | NULL |
| 4 | NULL |
| 4 | NULL |
| 4 | NULL |
+------+------+
+----------+----------------------+------+-----+---------+-----------
| Field | Type | Null | Key | Default | Extra
+----------+----------------------+------+-----+---------+-----------
| userid | smallint(6) unsigned | NO | PRI | NULL | auto_incre
| username | varchar(20) | NO | | NULL |
+----------+----------------------+------+-----+---------+-----------
+---------------------------+
| Tables_in_test |
+---------------------------+
| a |
| animals |
| b |
| cmplcate |
| columns_priv |
| contest_skill |
| db |
| dd |
| event |
| feeder_update |
| forum |
| func |
| general_log |
| gss_documen_cate |
| gss_documentation |
| help_category |
| help_keyword |
| help_relation |
| help_topic |
| host |
| human_employee_master |
| item |
| ndb_binlog_index |
| notice |
| pet |
| plugin |
| proc |
| procs_priv |
| product |
| pyk |
| search |
| servers |
| shop |
| slow_log |
| stock |
| student |
| system_user |
| t |
| t1 |
| t2 |
| t7974 |
| t_edition |
| t_rank |
| ta |
| taa |
| tab |
| tables_priv |
| tb |
| test |
| text |
| time_zone |
| time_zone_leap_second |
| time_zone_name |
| time_zone_transition |
| time_zone_transition_type |
| treenodes |
| tt |
| tt1t |
| ttt |
| tttt |
| type |
| url |
| user |
| viewlog |
+---------------------------+
你可以向我这样执行多条语句