load data infile

In order to popularize the basic knowledge of MySQL, deliberately get this chapter, mainly found that the first contact people do not know how to do, or do not understand, so here is the details of the=================================================

The InnoDB data table structure is as follows: The code is as follows Copy Code Create table:create Table ' Tinnodb ' (' id ' int (one) DEFAULT NULL,' Content ' Mediumtext) Engine=innodb DEFAULT Charset=utf8

For some large data systems, the problem is that the query efficiency is low, and there is a very important problem is that the insertion time is long. We have a business system that requires 4-5 clocks per day for data import. This time-consuming

MysqlimportExamplemysqlimport-uroot-p123456 Test/tmp/mytbl.txt;Convention: The last part of the file name is the table name, and the above statement is imported into the table MytblMysqlimport must specify the database, the above statement database

1.load Data:Practical application: Load the XLS file generated by the log into MySQL:Mysql_cmd ="iconv-c-F utf-8-t GBK./data/al_ver_"+ Yesterday_time +". Xls-o./data/gbk_al_ver_"+ Yesterday_time +". xls"Print(Mysql_cmd) Os.system (mysql_cmd)

MySQL database authorization principle server restart When mysqld is started, all authorization table content is read into the memory and takes effect from that time. Immediately applied by the server Modifications made to the authorization table

Mysql insert limit 1. if many rows are inserted from the same client at the same time, use the INSERT statement containing multiple values to INSERT several rows at the same time. This is faster than using a single-row INSERT statement (several

This article mainly introduces the open-source MySQL efficient data warehouse solution: Infobright details. This article describes the features of Infobright, the value of Infobright, the applicable scenarios of Infobright, and the comparison with

1. if many rows are inserted from the same client at the same time, use the INSERT statement containing multiple values to INSERT several rows at the same time. This is faster than using a single-row INSERT Statement (several times faster in some

SELECTTABLE_NAME, TABLE_ROWS, DATA_LENGTH10241024DATA_LENGTH, CREATE_TIME, TABLE_COLLATIONFROMINFORMATION_SCHEMA.TABLESWHERETABLE_SCHEMAlirORDERBYTABLE_ROWSDESC [dss @ localhost ~] $ Mysql-uroot-pEnterpassword: Welcometoth SELECT TABLE_NAME,

MySQL improves Insert performance and mysqlinsert Performance The time required to insert a record is composed of the following factors, and the number indicates the approximate proportion: Connection: (3) Send query to server: (2) Analysis

MySQL server permission table prompt: the MySQL server uses the permission table to control user access to the database. The permission table is stored in the mysql database and initialized by the mysql_install_db script. These permission tables are

MySQL Security Guide (2) 2.1.3 database and table permissions the following permissions apply to database and table operations. MySQL Security Guide (2) 2.1.3 database and table permissions The following permissions apply to database and table

Apache: 1. Modify the banner compilation source code and modify the default banner ServerTokens ProductOnly ServerSignature Off.Find ap_release.h in the apache source code package and change # define AP_SERVER_BASEPRODUCT "Apache" to # define

MysqlLoadDataInFile usage bitsCN.com first creates a table Use Test; Create Table TableTest ( 'Id' mediumint (8) default '0 ', 'Name' varchar (100) default'' ) TYPE = MyISAM; Import data to a data table Load Data InFile 'C:/Data.txt 'Into

The field table is not specified, So load data infile expects the input row to contain a field for each table column. Use the default fields and lines values. If you want to load only some columns of a table, specify a field table: Mysql tutorial>

Server restart When mysqld is started, all authorization table content is read into the memory and takes effect from that time. Immediately applied by the server Modifications made to the authorization table using Grant, revoke, or set password will

Mysql load data command parses and processes error 29 (ErrCode: 13) (In ubuntu environment), errcodeubuntu On the mysql server, run the following command: load data infile 'file_name' into table table_name; Store all data in a text file in a

The field table is not specified, so the load data infile expects the input row to contain a field for each table column. Use default fields and lines values. If you want to load only some columns of a table, specify a field table: MySQL

Server reboot situation When the mysqld is started, all the authorization table contents are read into the memory and come into effect from then on. Be immediately applied by the server Modifications to the authorization table with GRANT, REVOKE,