mysql> drop database if exists drop_database; Query OK, 0 rows affected, 1 warning (0.00 sec)//产生一个警告说明此数据库不存在 mysql> create database drop_database; Query OK, 1 row affected (0.00 sec) mysql> drop database
{ "msg-type": "activity", "date": "1574932159871", "thread-id": "9", "query-id": "129", "user": "root", "priv_user": "root", "ip": "", "host": "localhost", "connect_attrs": { "_os": "linux-glibc2.12", "_client_name": "libmysql", "_pid": "6004", "_client_v...
mysql is a simple SQL shell with input line editing capabilities. It supports interactive and noninteractive use. When used interactively, query results are presented in an ASCII-table format. When used noninteractively (for example, as a filter), the result is presented in tab-separated format....
--version: Shows the MySQL Workbench version number and exits. --verbose, -v: Enables diagnostics output. --query[connection]: Opens a named connection. --modelmodelfile: Opens the given EER model file. --scriptscript: Opens the given SQL file in a connection, typically used with the--qu...
named commands can be used from any line of the query, otherwise only from the first line, before an enter. Disable with --disable-named-commands. This option is disabled by default.*/ -g, --no-named-commands /*Named commands are disabled. Use \* form only, or use ...
(0.01 sec) ② User 展示当前链接用户 ③ Host 连接mysql的ip地址;可查到来源端口,同时可以跟踪出现问题语句的用户 ④ db 连接数据库的名称 ⑤ Command 当前链接执行的命令;query(查询)、sleep(休眠)、connect(连接)、daemon(守护进程) ⑥ Time 当前连接持续时长,单位时间是秒 ⑦ State 展示当前连接的sql语句...
在使用MySQL command-line tool连接OceanBase过程中出现连接不上的错误时,我们使用SQL审计日志进行定位,发现客户端在连接OB的过程中会执行一些元数据查询工作,在进行show tables这一步骤后会报错断连,后续定位到一个特殊的表,该表表名的最后一个字符是分号(t_sample;)导致了这次报错,随即我们在开源社区反馈了这例问题...
“Using Options on the Command Line”). However, in an option file, you omit the leading two dashes from the option name and you specify only one option per line. For example,--quickand--host=localhoston the command line should be specified asquickandhost=localhoston separate lines in an...
Within mysql, the following command: LOAD DATA INFILE 'D:/access.log' INTO TABLE alog FIELDS TERMINATED BY '|' ( tr, @sd, h, tp, po, ua ) set d=str_to_date(@sd,'%d/%b/%Y'); produces the following interesting output: Query OK, 542441 rows affected, 15 warnings (3.75 ...
Let’s say you have the following query: 当你想优化一个SQL的时候,经常需要修改SQL命令,有时候在客户端里把SQL放到一个文本编辑器里会好很多,使用edit命令可以做到这点。看下面的SQL mysql>selectcount(*)fromfilmleftjoinfilm_category using(film_id)leftjoincategory using(category_id)wherename='Music'; ...