desc table

MySQL joins columns, changes columns, deletes columnsALTER table: Add, change, delete table columns, constraints and other table definitions. View column: Desc table name; Change table name: ALTER TABLE T_book Rename to BBB; Add

ALTER table: Add, modify, delete table columns, constraints, and other table definitions. View column: Desc table name; Modify table name: ALTER TABLE T_book Rename to BBB; Add column: ALTER TABLE name add column name varchar (30);

MySQL joins columns, changes columns, deletes columnsALTER table: Add, change, delete table columns, constraints, and other table definitions. View column: Desc table name; Change table name: ALTER TABLE T_book Rename to BBB; Add

MySQL joins columns, changes columns, deletes columnsALTER table: Add, change, delete table columns, constraints and other table definitions. View column: Desc table name; Change table name: ALTER TABLE T_book Rename to BBB; Add

Oracle's column operations (adding columns, modifying columns, deleting columns), including manipulating multiple columnsAdd a column:ALTER TABLE Emp4 Add test varchar2 (10);To modify a column:ALTER TABLE Emp4 Modify Test varchar2 (20);Delete a

MySQL joins columns, changes columns, deletes columnsALTER table: Add, change, delete table columns, constraints and other table definitions. View column: Desc table name; Change table name: ALTER TABLE T_book Rename to BBB; Add

MySQL joins columns, changes columns, deletes columnsALTER table: Add, change, delete table columns, constraints and other table definitions. View column: Desc table name; Change table name: ALTER TABLE T_book Rename to BBB; Add

The characteristics of the database: structured, no harm, no duplication;Second, the database advantages: According to a certain data model organization, description and storage; can be shared for a variety of users, redundancy is small, save

MySQL joins columns, changes columns, deletes columnsALTER table: Add, change, delete table columns, constraints, and other table definitions. View column: Desc table name; Change table name: ALTER TABLE T_book Rename to BBB; Add

MySQL joins columns, changes columns, deletes columnsALTER table: Add, change, delete table columns, constraints and other table definitions. View column: Desc table name; Change table name: ALTER TABLE T_book Rename to BBB; Add

First, on the basis of the successful installation of MySQL, go to the cmd window and log in to our MySQL management system.Login mode: Mysql-u user name-p password650) this.width=650; "Src="

Day02One, MySQL indexSecond, MySQL storage engine+++++++++++++++++++++++++++++++++++One, MySQL index1.1 Index Description: Equivalent to "book directory"Page 50001~200 directory informationPhonetic sortingRadical sortStroke sort201~5000 body1.2

first, connect MySQL. Format: mysql-h host address-u user name-P user Password1. Connect to MySQL on this machine.First open the DOS window, then enter the directory Mysql\bin, and then type the command Mysql-u root-p, enter after the prompt you to

Source: SQL drip 41-mysql Common SQL syntaxALTER table: Add, modify, delete table columns, constraints, and other table definitions. View column: Desc table name; Modify table name: ALTER TABLE T_book Rename to BBB; Add column:

Original: http://blog.csdn.net/ws84643557/article/details/6939846MySQL add columns, modify columns, delete columnsExample: ALTER TABLE tb_financial MODIFY create_time DATETIME (3) DEFAULT NULL COMMENT ' entry time ';ALTER table: Add, modify, delete

Use commands to create a MySQL databaseHttp://www.sudu.cn/service/detail.php? Id = 11443 # 6d Zero, MYSQL Process Control Mysql:Show variables like 'Port ';Show variables like "have _ % ";Windows:Http://www.jz123.cn/text/3035482.htmlNet stop

I. Table introduction table is the basic unit for database data storage. A table contains several fields and records. II. Create Table Syntax: Createtable table name (attribute name data type [constraints], attribute name data type [constraints],

Last time we introduced: the database operation example of MySQL learning notes for beginners. This article introduces some simple table operation examples. Let's take a look at this part. 1. Table creation command: createtable table name (field

1. Start and exit 1. Go to MySQL: Start MySQL Command Line Client (MySQL DOS Interface) and enter the password for installation. The prompt is: mysql>2. exit MySQL: quit or exitIi. Database Operations1. Create a databaseCommand: create database For

Basic mysql knowledge literacy and mysql literacy This article mainly introduces some basic knowledge about mysql and prepares for subsequent SQL optimization.I. Connect to mysql I will not talk about mysql download and installation here. The first