code first migrations

# Reallocate partition (expansion)RESIZE2FS 1.41.12 (17-may-2010)Resizing the filesystem on/dev/sdb1 to 795184 (1k) blocks.The filesystem on/dev/sdb1 is now 795184 blocks long.[Email protected] ~]# mount/dev/sdb1/mnt/[Email protected] ~]# df-hFilesystem Size used Avail use% mounted on/dev/sda3 7.2G 1.9G 5.0G 28%/Tmpfs 242M 0 242M 0%/dev/shm/DEV/SDA1 194M 57M 128M 31%/boot/DEV/SDB1 752M 11M 703M 2%/mnt # Spare node disk space has been increased to maximum[Email protected] ~]# ls/mnt/This article

Due to server tuning, you need to migrate the database tablespace file about 2T above server A to another server B on the same network segment.Specifically, n 32G tablespace file (note that it is a single file 32G)The local area network transmits the file the tool many, but did not think is, once processing such a large document, the basic whole rest vegetable.First try the FEIQ, the transmission speed is very fast, 1000M network card speed can reach 90m/s, but, file transfer to 5280M time on th

;2) Enter domain-joined domain name and future domain account (existing), check join domain and set as default logon, click Next;650) this.width=650; "Width=" 526 "height=" 423 "src="/e/u261/themes/default/images/spacer.gif "style=" Background:url ("/e/u261/lang/zh-cn/images/localimage.png") no-repeat center;border:1px solid #ddd; "alt=" Spacer.gif "/>3) Select the user profile to be migrated to the domain user and click Next.650) this.width=650; "Width=" 523 "height=" 423 "src="/e/u261/themes/d

Five layouts: Flow layout (flowlayout) boundary layout (borderlayout) grid layout (GridLayout) common three card layout (cardlayout) grid package layouts (gridbaglayout) Two types of JFrame that are not commonly used Form (default BorderLayout layout) JPanel panel (default flowlayout layout) JButton button Jradiobutton Radio box (be sure to place a single selection in Buttongroup to form mutual exclusion) Jcheckbox check box JLabel label JTextField text box JTextArea multiline text field (must b

= localhost) (PORT = 1521)) (Connect_data = (SERVER = dedicated) (service_name = Orclstu))) CRM390 = (DESCRIPTION = (Address_list = (ADDRESS = (PROTOCOL = TCP) (HOST = 192.158.3.91) (PORT = 1521))) (Connect_data = (service_name = orclstu))) [[Emailprotecte D]_crm admin]$ [[Emailprotected]_crm admin]$ rlwrap sqlplus orclstuk/[emailprotected]; Sql*plus:release 11.2.0.1.0 Production on Thu Mar 22:15:41 2016Copyright (c) 1982,----Oracle. All rights reserved. Connected to:oracle Database 11g Enter

Label:Between different servers, transfer large library tables, export with mysqldump, source import, duplicate ENTRY/SYNATC error exists,The use of NAVICAT data transmission can be applauded to solve the problem of transmission between different servers;Data processing ToolsImport or Export WizardImport data from different format files to tables such as Access, Excel, XML, TXT, CSV, JSON, and more. Also, after you set up a data source connection, you can import data from ODBC. Simply select the

into Mark values (I,sysdate,dbms_flashback.get_system_change_number);Execute immediate ' alter system switch logfile ';Dbms_lock.sleep (15);End Loop;End/Commit; Perform recovery, during the migration process, you can transfer the backup files to the target host, restore the backed up data files on the target host, and start the database.Sql>startup Mount;Sql>recover database using Backup controlfile until cancel;After all the archived log files have been applied, you can open the database rea

1. Introduction Using migration in rails makes it easy to manage the structure of your database. You can create databases, create tables, delete tables, add fields, delete fields, and organize your data. Migration is a series of classes, all of which inherit the Activerecord::migration class. Class Createproducts Above is a migration example. The code in the UP method will Rake Db:migrate executed afterwards. The

One.DescriptionSome of the table data in the OLTP library is large and there is a constant amount of data added every month. Because historical data is not visited in this library, it is analyzed in 1 other OLAP libraries. Therefore, the historical data is migrated to the OLAP library. Operations on such historical data migrations. A better approach is to use a partitioned table for this table. After partitioning by time, the partition can be migrated

Tags: io ar data art on database PHP table functionWhen using the command line: PHP artisan migrate:make create_authors_table--table=authors--create, in migration.php if schema:: Table () Instead of schema::create, there is an indication that the table does not exist, and you need to change the schema::table to Schema::create.Sometimes input: PHP artisan migrate will show that other tables are already present so that new tables cannot be created, you can change the schema::create of the up funct

Brief introduction IBM Pureapplication System is an integrated hardware and software device that optimizes workloads and is designed to significantly simplify the development, provisioning, and management of applications in a private cloud environment. It has integrated management capabilities that allow flexible applications, databases, and other workloads to be delivered through self-service services. A number of key datacenter concepts have been redefined using pureapplication SYSTEM,IBM. H

Label:December 13, 2014 14:36 Sina blog (Transferred from Http://www.cnblogs.com/nmj1986/archive/2012/09/17/2688827.html) Demand: There are two different SQLite databases A, B, you need to copy the table in the B database to a database, when the amount of data is small, you can direct the table into a. sql file in the database visualizer Navicat, and then run the SQL file in another database. However, when the amount of data is large, this operation loses some of the data. Therefore, the follow

Keep the schema.rb under version control.Use Rake db:scheme:load instead of rake db:migrate to initialize the empty database.Use rake db:test:prepare to update the schema of the test database. Avoid setting default data in the table. Use the model

Recently just contacted Broadleaf commerce, an open source template for e-commerce websites. Specific operation and configuration can refer to the link: Click to open the linkThe template is run under the Jetty container, and the database is hsql.

An overview of the Code-I migration in the Entity Framework. The topics are: enable migration generation and run migration custom migration data movement and custom SQL migration to a specific version (including demotion) generate SQL scripts to automatically upgrade at application startup (Migratedatabasetolatestversion initializer) building an initial model and database Before you start using migrations,

)-LocalDb included in Visual Studio 2012.Note: If you have SQL Express installed, always use it first, even if you are using Visual Studio 2012(LOCADB database)(SQL Express database) Enable migrationNow we need to make some changes to our model. Let's introduce a URL attribute to the Blog class. public string Url { get; set; }If you plan to run the application again, InvalidOperationException is displayed, indicating that the model that supports the "Blogcontext" context has c

migrations. Then run the program and report the error above.3. In the project execute command enable-migrations, regenerate the migration folder. Then run the program, the same error.4. Delete the project-related migration record in the migration history table in the database, delete the Migrations folder in the project, and then execute enable-

record to the __migrationshistory table to indicate that the migration has been applied. Mode two: In this way, we need to use migrations to create the entire database from scratch-including tables that already exist in the local database. We will generate an initial migration that contains this logic and create it with an existing schema. Then, the migration is applied to our existing database. 1, run the add-migration initialcreate command in the P

[EF] How to manually set the Migration job of Code First in Entity Framework, entitymigration The Entity Framework (EF) has developed to the present, and the version has entered 6.1.0. It has been six months since I wrote the article "build an EF database in Code First mode in VS2013. If you started using EF Code First like me at that time, you should have a basi

Reference: http://blog.csdn.net/sxycxwb/article/details/121861590. Delete the previous database1. Run the enable-migrations command in the package Manager ConsoleGo to the (PM) package Management Console (view--Other Windows--"package Management Console") Enter the following command: Enable-migrationsThe hint: "No context type is found in the assembly", probably because of the "0" reason, but can be resolved by "2". 2, pm> enable-