primary name server

Reprinted from: http://blog.csdn.net/sunrise918/article/details/5575054These days on the logical primary key, business primary key and composite primary key have some thinking, also searched the related discussion on the net, related discussion can

Reproduced: http://blog.csdn.net/sunrise918/article/details/5575054 In the past few days, I have thought about logical primary keys, business primary keys, and composite primary keys. I also searched for some discussions on the Internet. For more

Primary Key and foreign key in the database, primary key of the database 1. What are primary keys and Foreign keys: A record in a relational database has several attributes. If one of the attribute groups (note that it is a group) uniquely

Because server A cannot see the witness server W or the original mirror partner server B, you must enter the disconnected state and make the database unavailable. Server B and Server w can compose quorum. Server B cannot see server A, so Server B

1. Definition 1.1 What are primary keys and foreign keys 1.2 The role of primary and foreign keys 1.3 Differences between primary key, foreign key, and index 2. Primary key (primary key) 2.1 Setting the primary key via

The logical design of database is a very broad problem. In this paper, the main key design of the table is discussed in the design of MS SQL Server in the development application, and the corresponding solution is given. The status and problems of

primary key foreign keys and indexes(This article is transferred from http://www.cnblogs.com/longyi1234/archive/2010/03/24/1693738.html) First, what is primary key, foreign key: a record in a relational database has several attributes, if one of

First, what is primary key, foreign key: A record in a relational database has several properties, and if one of the attribute groups (note the group) uniquely identifies a record, the attribute group can be a primary keyLike whatStudent form

Original: MS SQL Server searches for the column name of a table's primary keySELECT syscolumns. Name from syscolumns,SYSOBJECTS,sysindexes,SysindexkeysWHERE syscolumns. ID =object_id(' tab_xxx ')--syscolumns.id The Table object ID that the column

The logical design of databases is a wide range of issues. This article focuses on the primary key design issues and corresponding solutions when designing tables on ms SQL Server during application development. Primary Key design status quo and