mysql show warnings

1. The show ERRORS statement simply displays the error of the previous statement and does not display both warnings and considerations.As an example: The code is as follows Copy Code Mysql> Show DFDAFSADF->;Error 1064 (42

Mysql> explain extended select count (*) from xuehao;+ ---- + ------------- + ------- + ------ + --------------- + ------ + --------- + ------ + ---------- + -------------------------------- +| ID | select_type | table | type | possible_keys | key |

Objective In order to ensure consistent integrity of data, there is a locking mechanism in any database. The quality of locking mechanism should be directly thought of the concurrent processing ability and performance of a database system, so the

Brief introductionMMM (Master-master Replication Manager for MySQL) is a set of scripting programs that support dual-master failover and dual-master daily management. MMM is developed using the Perl language, which is mainly used to monitor and

实现MySQL读写分离部署集群基础环境1 realizing MySQL read-write separation1.1 QuestionsThis case requires the configuration of 2 MySQL server +1 proxy Server, to achieve the MySQL agent read and write

SHOW CHARACTER SETShow all the available character setsCHARACTER SET CHARACTERSETlike'latin%';SHOW COLLATIONThe output includes all available character sets like ' latin1% ';SHOW COLUMNSDisplays the information for each column in a given table, and

MySQL常用指令，java，php程序员，数据库工程师必备。程序员小冰常用资料整理MySQL common commands (for reference)The most common display commands are:1. Display the list of databases.show databases;2. Display the data table in the library:Use MySQL;Show tables;3, display the

How to configure MySQL database server on CentOS BitsCN.com accidentally found CentOS Professional Forum, remember: http://www.centospub.com As a result, the initial learning configuration This environment: CentOS system, Mysql-server (version

Query Profiler is a query diagnostic analysis tool that comes with MySQL to analyze where the performance bottlenecks of an SQL statement are. Usually we are using the explain, and slow query log is not accurate analysis, but query Profiler can

first, start and close1.1 Linux command to start MySQL: A. RPM Package Installation: Service mysqld start B. Source package Installation:/usr/local/mysql/bin/mysqld_safe--user=mysql & 1.2 Linux to restart MySQL command: