db2 add primary key

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MSSQL-Logical primary key, business primary key, and composite primary key

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

Thoughts on logical primary key, business primary key, and composite primary key

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

It is not allowed to set the db2 primary key to solve the problem.

What should I do if an error occurs when setting the db2 primary key? The following describes how to solve the problem of not allowing you to set the db2 primary key. We hope this will help you learn how to set the db2 primary key. Set empno as the


Transfer from http://www.ibm.com/developerworks/cn/data/library/techarticles/dm-0508luojunkai/Original: http://blog.csdn.net/deanza/article/details/8469447Standby is one of the DB2 high availability (Ha,high availability) technologies (and snapshot

DB2 and Oracle concurrency control (lock) comparison _oracle application

1 Introduction In relational databases (Db2,oracle,sybase,informix and SQL Server) the smallest recovery and transaction units are one transaction (transactions), and transactions have acid (atomicity, consistency, isolation, and permanence)

Common DB2 commands

Common DB2 commands Common DB2 commandsI. Basics1. db2 connect to -- connect to the local database nameDb2 connect to user using -- connect to the remote database2. db2 force application all -- force all applications to disconnect the database3.

DB2 High Availability disaster recovery

  Through this article, you will learn about DB2Hadr functions and basic operating principles, you can quickly configure an hadr environment through an instance and perform some simple functional tests. Next we will discuss some technical points

DB2 Common Commands

DB2 Common CommandsFirst, the basic article1. DB2 Connect to --Connect to local database nameDB2 Connect to user Using --connect to the remote database2. DB2 force application All--forcing all applications to disconnect from the database3. DB2

DB2 Key constraint operation

Today encountered a problem, want to delete a table in a column of the only constraint, Google a bit, search out many, find can use, write down to summarize as follows.The command is as followsSelect Constname, TabName, ColName, colseq from

Hibernate primary key Generation policy

Hibernate provides a primary key generation strategy that allows us to set the keyword in the mapping XML file of the entity class to tell hibernate how we want to generate the primary key, and Hibernate will then complete the primary key control of

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