mysql materialized view

This example achieves the following results:0. The test database has the userinfo user information table and the userinfolog user information log table.1. When a new record is created for a userinfo table, the trigger adds the new log to userinfolog.2. Create a stored procedure for adding records to the userinfo table3. Based on the date of birth field in the userinfo table, we will create a user-defined function for simple age calculation.4. Create a userinfo

1. Error logUse the –log-error[=file_name] option to specify where MYSQLD saves the error log file. If the file_name value is not given, MYSQLD uses the error log name Host_name.err and writes to the log file in the data directory. If you perform FLUSH LOGS, the error log renames the suffix with-old and mysqld creates a new empty log file. (If the –LOG-ERROR option is not given, it will not be renamed). If you do not specify –log-error, or (in Windows), if you use the –console option, the error

the character set for a string argument.>collation (str) returns how string parameters are sorted View results: To change the character set again query results: set names ‘utf8‘; select * from v; Will get a different result: CHARSET (CHAR (+)) COLLATION (CHAR (+)) Utf8 Utf8_general_ci (My computer has no way to show the correct results, so the data directly posted out-_-) The option

This article describes how to use MysqlBinlog to quickly traverse search records and how to view binlog data. if you need to use MysqlBinlog, you can refer to the following target. the developer said that some data has been added inexplicably, but I do not know where to add the data, and the application function should not add such data. in order to find out the source, I am going to find it in binlog, however, the number of binlogs is several months.

, this value inherits from the configuration in the configuration file, character_set_server is set to the default character set;(4) When creating a new database, unless explicitly specified, the character set of this database is set to character_set_server by default;(5) When a database is selected, character_set_database is set to the default Character Set of the database;(6) When creating a table in the database, the default Character Set of the table is set to character_set_database, which i

MySQL binary logs are often used. How can I view MySQL binary logs? The following describes how to view the MySQL binary log for your reference. MySQL binary log: From the overview, I can see that the log-bin of my. ini configurat

View the MySQL show profile (profiling Report) The show profil command is provided by MySQL to analyze the resource consumption of statement execution in the current session. It can be used for SQL optimization measurement. 1. Enabling and disabling Parameters 1.1 view parameters By default, the parameter is disabled a

Fifth. mysql transaction, view, index, backup and restore I. Transaction 1. What is a transactionA transaction is a mechanism, a sequence of operations, that contains a set of database operations commands and submits or revokes an operation request to the system as a whole. Either they are executed, or none are executed.Transactions are used as the smallest control unit, especially with database systems tha

MySQL server variable data operations DML-View Components of the SQL language Common categories: DDL: Data Definition Language DCL: data control language, for example, DML authorization: data operation language Other categories: Integrity definition language: some functional constraints of DDL: including the primary key, foreign key, unique key, condition, non-null, transaction, and other constraints

Tags: bex5 a small problem with MySQL view in developmentProblemQueries in data operations are extremely important and frequently used. The concept of view in the MySQL database is very similar to the query in the Microsoft Access Small relational database (second-level exam focus). The presence of views greatly reduce

Below we look at a Linux to see Nginx, Apache, MySQL, php compiler parameters Examples, I hope this example will help you. View Nginx, Apache, MySQL, PHP parameters we can use /app/nginx/sbin/nginx-v View Nginx Parameters # cat Config.nice View Apache parameters #cat "/u

View the running mysql status to monitor the running mysql. One way is to view the mysql running status. Www.2cto.com (1) QPS (Queries per second) QPS = Questions (or Queries)/seconds mysql> show global status like 'Question % ';

Tags: through SQL statements. com row TAF create thread get form man Original link: MySQL View database related information When using MySQL, you need to know the current database, such as the current database size, character set, user, and so on. Here's a summary of some commands for viewing database-related information 1: V