unique index in db2

Comparison of unique constraints and unique indexes in DB2 and Oracle: db2 => connect to sample database connection information database server = db2/NT 10.1.0 SQL authorization id = ADMINIST... local Database alias = sample create table db2admin.

Hchao, a moderator of the IBMDB2 database Professional Forum, once published a blog post to help DB2DBA avoid performance disasters and achieve high performance. I have summarized a fault diagnosis process for our customers, users, and DB2 experts.

1. Launch instance (DB2INST1):Db2start2. Stop the Instance (DB2INST1):Db2stop3. List all instances (DB2INST1)Db2ilist3-1. List the current instance:DB2 Get Instance3-2. List all databases:DB2 List Database Directory4. Look at the sample

For helpDB2DBA avoids performance disasters and achieves high performance. I have summarized a fault diagnosis process for our customers, users, and DB2 experts. The following describes in detail the 10 most important performance improvement

DB2 is a series of relational database management systems exported by IBM, which serve on different operating system platforms. We will explain the DB2 ten optimization techniques.To help DB2 DBAs avoid performance disasters and get high performance,

DB2 supports the following two types of tablespaces:1. System Management Memory table space (Sms-system MANAGED STORAGE)2. Database Management Memory table space (Dms-database MANAGED STORAGE)Comparison of characteristics of SMS and DMS user table

[Posting] DB2 partition features Data Warehouse scenario overviewLevel: Intermediate Paul McInerney (paulmci@ca.ibm.com), user-centric design expert, DB2 development, IBM September 18, 2006 This article introduces the following table design features

Category: LinuxAn overview of the INSERT processing processFirst, let's take a quick look at the processing steps when inserting a row. Each of these steps has the potential for optimization, which we'll discuss in a later step.Prepares the

The main consists of 4 parts, namely:DB2 system CommandsDB2 Database Manager Configuration ParametersDB2 Database System Configuration ParametersDB2 Management Server (DAS) configuration parametersDB2 system Commands Dasauto-Automatically start the

Introduction PHP supports Simple Web application development and deployment environments. This is one of the reasons for its widespread application. The Native XML feature of DB2 9 further simplifies the development process. This simplification is