create table tablename

Review common points of knowledge in MySQLBoot off service mode for win version. Connect mysql command: mysql-u alex-p View all databases: show databases;use db_name; switch database show tables;  Show All tables select * from table name; Select

I. PRIMARY KEY1. There is only one primary key for each table 2. Each primary key can consist of multiple columns. (If the primary key consists of multiple components, as long as there is a row value not equal)CREATE TABLE NAME ( ID INT

This article mainly introduces considerations for migrating Oracle to the MySQL database. we encountered the following problems during the actual conversion process, therefore, the main purpose of sharing this article is to provide some practical

Http://www.oschina.net/question/17_4248 Considerations for MySQL storage engine InnoDB, MyISAM, and row lock2010-02-21 18:21MyISAM is the default storage engine in MySQL. Generally, not many people care about this. It is a tricky thing to decide

You can use tcom to access ADO. The following is a class for accessing ADO encapsulated in Script. NET. The code of this class can be found in Script. NET. (Www.blueantstudio.net) ######################################## #########################

This article introduces two methods for viewing user permissions in MySQL. Two Methods for ySQL to view user permission commands: 1. Use MySQL grants Usage: The Code is as follows: Copy code Mysql> show grants for username @

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

MySQL database provides 13 different storage engines to handle different data processing. Most people who have used MySQL should know the two storage engines commonly used by MySQL: MyISAM and InnoDB. In most cases, MyISAM exists as the default

We used the create table command to create a table in mysql. The table can be followed by data such as field names and types. For mysql beginners, we recommend using phpmyadmin to create a table, this is a simple method. Let's learn it together. The

MySQL learning notes (the steps it takes) and mysql learning notes The basic steps are as follows: (not accurate. Please read this article)1. from2. join on3. where4. group5. having6. order7. select8. distinct, sum ,...9. limitJoin table must have

The MyISAM type does not support advanced processing such as transaction processing, while the InnoDB type supports. This article will explain the differences between engineinnodb and enginemyisam in mysql. If you do not know how to learn, I hope it

The following articles mainly introduce how to import and export SQL files from MySQL databases, that is, how to import and export SQL files from MySQL databases. We will mainly divide these files into five major steps to describe them, if you are

In our development, database backup is a very important part. Let's share two php backup mysql database classes. If you have any need, you can modify them. In our development, database backup is a very important part. Let's share two php backup

Mysql common command cutting 1. Table and database display 1. showdatabases; show all databases 2. usedbname; enter the database, ex: usetest; enter the test database. 3. status displays the current database and related data. 4. showtables: Show All

MySQL's built-in engine must be enough, but in some cases, other engines may be more suitable for completing tasks than they are used at hand. If you want to, you can even use MySQL ++ API to create your own database engine, just like hitting the

The following articles mainly describe how to port the Oracle database to the MySQL database. We all know that the Oracle database is currently the most widely used database, the application rate of the MySQL database is far inferior to that of the

MYSQL has a data type that increases automatically. When you insert a record, you do not need to operate on this field. The data value is automatically obtained. ORACLE does not have a data type for automatic growth, so an automatic growth is

This article mainly introduces considerations for migrating Oracle to the MySQL database. we encountered the following problems during the actual conversion process, therefore, the main purpose of sharing this article is to provide some practical

The following articles mainly introduce the differences between the MySQL storage engine (InnoDB) and MyISAM, including evaluation, evaluation, and related performance tests, the following is a detailed description of the article, hoping to help you

Create a databaseFirst define the subclass of the SqliteopenhelperThe code is as follows:Package Com.example.myandroid;import Android.content.context;import Android.database.sqlite.sqlitedatabase;import