MySQL

Description of troubleshooting of Chinese garbled MYSQL in XAMPP: After XAMMP is installed, the MySQL database is built in. Create your own database-create a database table-add Chinese records to the table through jdbc-all the Chinese characters

1. CREATE a stored procedure delimiter // drop procedure if exists 'proc _ test' // create procedure 'proc _ test' (TABLE_NAME VARCHAR (20), num int) BEGIN www.2cto.com SELECT * FROM TABLE_NAME limit num; END // DELIMITER;CALL the stored procedure:

As a mysql dba, You need to regularly check the indexing status of the server, especially when you arrive at a new environment and start to take over some database maintenance work, you need to know the indexing usage of online servers. If the index

Modify mysql Character Set and default storage engine 1. modify mysql character Set mysql Database Current character Set mysql> show variables like 'character % '; + metrics + | Variable_name | Value | + metrics + | character_set_client | latin1 |

The script for Mysql database flushing contains Chinese characters. After logging on with the Mysql command, it is flushed into the database and garbled during reading. The possible causes are as follows:After mysql is installed, the client

1. Select to act on the row! Select a single object operation. The operation object is a table. This operation selects rows from the table that meet the conditions according to the given conditions to form a new table as the calculation result.

MySQL character data is case-sensitive. MySQL stores character type values, which are case-insensitive by default. Therefore, if the 'binary 'keyword is not specified during select, the default value returned is the size. 1 create table 'test _ t1' (

In MySQL, The UNIX_TIMESTAMP function is used. In MySQL, The UNIX_TIMESTAMP function has two types for calling. 1. No parameter call: UNIX_TIMESTAMP (). Return Value: example of the number of seconds difference from '2014-01-01 00:00:00 'to the

When creating a temporary table, you can use the temporary keyword. For example, create temporary table tmp_table (name varchar (10) not null, passwd char (6) not null) 'www.2cto.com or create temporary table if not exists sp_output_tmp ENGINE =

In Linux, MYSQL installation and basic management install some necessary linux packages: [plain] yum install gcc-c ++ gcc-g77 autoconf automake zlib * fiex * libxml * ncurses-devel libmcrypt * libtool-ltdl-devel * libevent install mysql, mysql

MySQL Database Export SQL garbled solution environment: NavicatforMysql8.2 + MySQL Sever 5.1 problem: MySQL Database Export SQL garbled solution: Method 1: The database encoding into UTF-8. Database --------> right-click --------> database

The MySQL database insertion speed is adjusted due to abnormal project requirements. database records need to be rapidly increased in a short period of time (due to the increase of 0 to 0.4 billion in two or three days ). The optimization process is

Note for demo statements made by mysql: mysql union and group encounter errors. Both parties must separate the not in and limit brackets (SELECT app_type_id, app_type_name FROM 'app _ dw '. 'app _ type' # table_nameorder by app_type_id limit 5) www.2

In MYSQL stored procedure development, how to use cursors for nesting is inevitable in actual business logic development. For example: delimiter // drop PROCEDURE if exists good_nested_cursors1 // CREATE procedure good_nested_cursors1 () reads SQL

Mysql cannot be found in Linux. solution to the sock file: by default, mysql compilation and installation may fail to connect to the mysq server after installation. The ERROR "ERROR 2002 (HY000 ): can't connect to local MySQL server through socket '/

Through tracking and debugging the MySQL database source code, and referring to the MySQL official documentation, the MySQL internal temporary table Usage Policy is organized for a more in-depth understanding. Using the internal temporary table

MySql stored procedure-4. Parameter-related links: MySql stored procedure-1. Basic knowledge of SQL stored procedure-1. Parameter classification parameters, same as programming, mySql stored procedures can also contain parameters. In the previous

My friend Haibin asked me what the length after int type represents when mysql was creating a table? Is this column the maximum width allowed to store values? Why can I set it to int (1) and save 10,100,100 0.At that time, although I knew int (1),

LAST_INSERT_ID usage of MySQL LAST_INSERT_ID () automatically returns the value of the first table set in the AUTO_INCREMENT column in The Last INSERT or UPDATE query. Note for LAST_INSERT_ID of MySQL: first, the Connection object used for query and

A colleague needs to add a field to a table (InnoDB table with existing data). If no default value is required, add the data in the previous table: 01 mysql> select * from t1; 02 + ------ + 03 | id | 04 + ------ + 05 | 1 | 06 | 2 | 07 | 3 | 08 + ----