database commands

First, export the database with the mysqldump command (note the installation path of MySQL, which is the path to this command):1. Export Data and table structure:Mysqldump-u User name-p password database name > database name.

Db.getcollection ('Product').Update({Status: "Offline"},{$Set: {status: "Online"}},false,true) update, change all status offline to online, note quotes db.collection.Update(criteria, objnew, Upsert, Multi) The description of the four parameters is

To create a database:Const std::string Createimmessageindex ="CREATE UNIQUE INDEX IF not EXISTS sessionid_idx on immessage (msgId Desc,sessionid);";Delete Number of bars:Const std::string DELETEMESSAGEBYSID+ = "Delete from immessage2 where msgId =?"

How we want to delete a collection can take the db.test.drop () Way, in fact, behind this, this function is running the drop command. The same effect can be achieved with RunCommand. Let's start by creating a new collection to use as a test:> Use

Learning Notes (iii)--Application of database commandsOne, stored procedures(i) Basic conceptsThe stored procedure is the SQL statement inside the SQL database system, the advantage is that it can improve the execution efficiency, improve the

First, export the database:mysqldump command1. Export Data and table structure :Mysqldump-u User name-p password database name > database name. sql#/usr/local/mysql/bin/mysqldump-uroot-p ABC > Abc.sqlYou will be prompted to enter your password after

1 the owner of each package authorizes the corresponding package to you. Microsoft is not responsible for and does not grant the third equation2 3 any license to the order package. Some packages may contain dependencies that are controlled by other

First, export the database with the mysqldump command (note the installation path of MySQL, which is the path to this command):1. Export Data and table structure:Mysqldump-u User name-p password database name > database name.

Reference address: Linux import, export mysql database commandFirst, export the database with the mysqldump command (note the installation path of MySQL, which is the path to this command):1. Export Data and table structure:Mysqldump-u user name-p

MYSQL _ common database commands 1. log on to www.2cto.com $ mysql -- user = root -- password = xxxxxx 2. database Operations list all databases mysql> show databases; create database mysql> create database x123; delete database mysql> drop database

We will discuss the optimization of database performance by using related database commands. on the other hand, we will use the built-in tools of the database server to assist in performance analysis and optimization. ▲Show Run the following

Common MySQL database commands: simple, super simplified bitsCN.com 1. MySQL common commandsCreate database name; create a database Use databasename; select database Drop database name directly deletes the database, no reminder Show tables; displays

Oracle Common database commands  1.Create a tablespaceCreate tablespace nameDefaul 'filename'/path 'server path '[sizeinteger [k | m][Autoextend [off | on];Size: Specifies the file size. autoextend is used to start or disable automatic expansion of

First, export the database with the mysqldump command (note the installation path of MySQL, which is the path to this command):1. Export Data and table structure:Mysqldump-u User name-p password database name > database name.

1, System Management 1.1 connection MySQLformat : mysql-h host address-u user name-P user PasswordExample :Example 1: Connect to MySQL on this computer.First open the DOS window, and then enter the directory Mysqlbin, and then type the command

Viii. operation of dataShow databases;//Display all databasesUse testdb//using TestDB databaseShow tables;//Display all tablesCREATE table users (ID int auto_increment,username varchar), address varchar ($), age Int,key (ID));//creating tables, ID

1, System Management 1.1 connection MySQLformat : mysql-h host address-u user name-P user PasswordExample :Example 1: Connect to MySQL on this computer.First open the DOS window, and then enter the directory Mysqlbin, and then type the command

First, export the database with the mysqldump command (note the installation path of MySQL, which is the path to this command):1. Export Data and table structure:Mysqldump-u User name-p password database name > database name.

Hardening MongoDB Recommendation: Modify the database default port to add Database access permissions: Startup database (Bare ben): C:\mongodb\bin>mongod--dbpath C:\MongoDB\data (also specify data storage location as "DB" folder

The following articles mainly describe MySQL database commands. This article mainly uses the actual application code to introduce the actual operations of MySQL database commands. At the same time, this article also involves the actual application