mysql table

Environment MySQL 5.1 + command line tools problem MySQL table field Set default value Solve Copy Code code as follows: --sql: CREATE TABLE Test ( i_a int not NULL DEFAULT 1, Ts_b Timestamp not NULL DEFAULT now (), C_c

Some times you may need to bulk convert the MySQL table engine, as follows for PHP operations /** * Bulk conversion MySQL table engine */ Error_reporting (E_all); Database Connection Configuration $host = ' localhost '; $username = ' root '; $passwd

quickly modify the table structure of a MySQL table-- excerpt from "MySQL Management"ALTER table name MODIFY column name data type; This command can modify the table structureIn addition, you can modify the table structure as follows:First create a

There are three ways to view the MySQL table structure: 1,DESC tablename; For example: To view the Jos_modules table Structure command: Desc Jos_modules; View results: mysql> desc jos_modules; +------------------+---------------------

Work has such a demand, to the user's charm value data ranking, generate a list of the Top 40, every 5 minutes to refresh the list. This requirement is very easy to achieve with Redis's zset. But the data exists in MySQL table, there is 400多万条, how

Detailed Design and Application of mysql table sharding generally, when the data in our database exceeds records, we should consider Table sharding or partition. This time I will introduce in detail some table sharding methods. Currently, all the

Why does MySQL table correspond to only one. frm file, no. MYD and. the MYI file learned MySQL today and found that when creating a new database table, the table only corresponds to one. frm file, but no. MYD and. MYI file. After some searching, I

The MySQL table creation stage is a very important step. The quality and advantages of the table structure directly affect the subsequent management and maintenance, I will share some practical tips to summarize my accumulation of MySQL tabulation

Table partitions are only recently known. I used to split tables to achieve hundreds of millions of data records. Let's introduce how to create and use mysql table partitions, I hope this will help you.Test and use of table partitions. The main

MySQL table names/column names are case sensitive. in MySQL, databases and table pairs are stored in directories and files under those directories. Therefore, the sensitivity of the operating system determines the case sensitivity of the database

Question: Some problems are just common sense, but in some situations, "impatient" Administrators may ignore these common sense. Of course, this is also a mistake that many people will make. I would like to record this anecdote just now. Common MySQ

We know that a large MySQL table with massive records can be divided into several tables based on the primary key, time field, and condition field, or even saved on several servers. The only problem is that cross-server batch query is troublesome

Author: skateTime: 2013/05/14 MySQL table sharding principles When using MySQL in large quantities and with high data access, we will introduce the MySQL sharding standards to improve the performance of table sharding.   Environment:Business type:

PHP how to loop output comment and reply MySQL table structure whether there is a problem Now do the table: Comment form for comments and replies +------+----+---------+--------+ | ID |uid | Content | PID | +------+----+---------+--------+ | 1 | AA |

MySQL partition, mysql table Partition In mysql, the learn directory structure is as follows: Let's take a look at the definition of sales in the table: show create table sales \G *************************** 1. row

MySQL table creation statement 1. Create a user table User_id Name Age Sex Phone   　 　 　 　   Create table user (user_id int (4) primary key auto_increment, Name varchar (20 ), Age int (4 ), Sex

When I first started using mysql, I first wanted to differentiate the case sensitivity of column names. I found many methods on the Internet, so 1. After mysql is installed in linux, the default value is: case-sensitive for table names, not

Use kettle to insert the text file content into the mysql table under the Linux Virtual Machine. kettlemysql I. decompress the kettle package 1. Copy the package to Linux.     Mysql driver package     2. decompress the zip package Enter the command:

Mysql table optimization, analysis, check, and repair methods, mysql details This article describes how to optimize, analyze, check, and fix mysql tables. We will share this with you for your reference. The details are as follows: Here, we will

MySQL table sharding auto-incremental ID Solution After we perform the table sharding operation on MySQL, we cannot rely on the automatic increment of MySQL to generate a unique ID, because the data has been distributed to multiple tables. Avoid