db2 basic commands

DB2 clearing the database sequence cacheAlter sequence wfr.wfr_bill_histories_s NoCache;Create a script that empties all table dataSelect ' ALTER TABLE ' | | RTRIM (Tabschema) | | tabname| | ' Activate not the logged initially with empty table; ' from syscat.tables where type = ' T ' and Tabschema not in (' SYS IBM ', ' systools '); Generate statements that delete all foreign keysSELECT' ALTER TABLE ' | | tabschema| | '. ' | | SUBSTR (tabname,1,50) |

Over the past few years, many books have been produced to discuss best practices in DB2 design and implementation, including a large number of books and articles. These books delve into how to design DB2 and integrate it into an application. To provide some basic guidance for customers and business partners to understand, this article compiles a series of best pr

Brief introduction The following is a quick reference to the most commonly used DB2 CLP commands. Although not a complete reference, this document can prove to be a valuable reference material for any user who has just contacted DB2. Feedback can be sent to ypaul@ca.ibm.com. The arguments in square brackets are optional arguments, and the contents in angle brac

The following articles mainly introduce the basic tutorial of SQL coding optimization for the IBM DB2 database. The importance of such a specific query is that the more important the query is, you may need to optimize indexes by creating indexes. If you are coding the query that the CIO is running every day, make sure it provides the best performance. Therefore, it is important to create an index for this s

Db2start starting the databaseDb2stop Stop DatabaseDB2 Connect to dbname user username using pwd Connection DatabaseDB2 get dbm CFG view Database Manager configurationDB2 update dbm CFG using SVCENAME 55000 change listening portDb2ilist viewing a DB instanceDB2 list Tables list all user tablesDB2 describe table tablename display tables structureDB2 List DB directory lists all databasesDB2 list node directory lists database nodesDB2 list Active databases lists all active databasesDB2 terminate

Tags: creat specify location execute grant use ASE set NEC statementBuild Library Create db vipface using CodeSet UTF-8 on Build library to specified location Create Database on D:using codeset GBK Territory CN List all databases Database Directory Granting Dbadm permissions to users Grant on Database to User Db2admin command line execution SQL file - -CF d:\1-2. Log Connecting to a database to Vip Export Database DDL - - - -o D:\VIP_TABLE_DB2.sql Query schema for all Tables productio

This article describes four basic types of connection to DB2 in java. The following describes the four basic types of connection to DB2 in java, I hope you will be helpful in your future studies. The following articles will provide you with relevant knowledge. The following is a detailed description of the relevant con

DB2 basic concepts-instances, databases, tablespaces, containers DB2 supports two types of tablespaces: 1. System Management memory tablespaces (SMS-SYSTEM managed storage) 2. Database Management memory tablespace (DMS-DATABASE managed storage) default tablespace: DB2 creates three tablespaces by default when creating

This article mainly describes the basic knowledge of DB2: DB2catalog. Many people may not have a special understanding of the word catalog in the DB2 database. Specifically, it refers to cataloguing nodes and database. If you want to understand the cataloguing, let me briefly talk about the architecture of the DB2 data

logsThese log files have been removed from the active log directory. You can either manually orIt is automatically called through a process such as userexit. The archived log file can beStored on tape or other media. For example, on tsm.Active logs (Activity logs)-> If the logs are used up (online archiving logs)-> back up or remove these unused logs (offline archiving logs)The role of cyclic logs in Backup recovery:The only LOG method that supports Rollback Recovery and database recovery.Suppo

This article is intended for beginners who are new to DB2 databases and want to understand how to operate DB2 basic date and date usage. Most people who have used other databases will be pleasantly surprised to see how easy it is to operate on the date and time in the DB2 database.

Management space content=all persistent data. Regular table Space State= 0x0000detailed explanation: Normal table space identification= 1name=TEMPSPACE1 Type=System Management Space content=system Temporary Data status= 0x0000detailed explanation: normal ...2. View table Space DetailsE:\Program Files (x86) \ibm\sqllib\bin>DB2 List tablespaces Show Detail tablespace tablespace identifier of the current database= 0name=syscatspace Type=Database Managem

Label:★ CREATE DATABASE: Edmpdb and SharedbDB2 CREATE DATABASE edmpdb using CodeSet UTF-8 territory cn [PageSize 8192]DB2 Connect to EdmpdbDB2 Create Bufferpool bp32k size 32k pagesizeDB2 Create system temporary tablespace tempts32k pagesize 32k bufferpool bp32kDB2 CREATE DATABASE Sharedb using CodeSet UTF-8 territory cn [PageSize 8192]DB2 Connect to SharedbDB2 Create Bufferpool bp32k size 32k pagesizeDB2 C

The following articles mainly describe the basic operating principles of the IBM DB2 connection concentrator. If you are curious about the basic operating principles of the IBM DB2 connection concentrator, the following articles will unveil its secrets. The following is a detailed description of the article. I hope you

The following articles describe the two basic cases of comprehensive analysis of DB2 deadlock and lock wait. If you are interested in the two basic situations of DB2 deadlock and lock wait, you can click to view the following articles. Locks are introduced by databases to control the integrity of concurrent data. Locks

The DB2 tutorial you are looking at is: IBM DB2 basic Performance tuning. Buffer pool If you have experience using DB2 UDB, you should know that the buffer pool is a space in memory that is allocated separately to the DB2 database manager, allowing it to add new data to the

The db2 tutorial is: Basic Performance adjustment of IBM DB2. Buffer Pool If you have experience using DB2 UDB, you should know that the buffer pool is the space allocated separately to the DB2 database manager in the memory, let it add new data as a database or respond to

Today we will mainly talk about DB2catalog, a basic knowledge of the DB2 database. We all know that the catalog in the DB2 database is catalogued. This word is hard to understand. In other words, the cataloguing has a directory node, cataloguing databases. To understand the cataloguing. First, let me briefly talk about the architecture of the

name new value25. How do I modify the buffer?Add buffer: Create Bufferpool size [pagesize 4096] {[NOT] EXTENDED STORAGE} Modify buffer: Alter Bufferpool size {[NOT] EXTENDED STORAGE }Delete buffer: Drop BufferpoolIf the buffer size is set to 1, the number of pages in the buffer pool is determined by the database configuration parameter buffpage.Note: The database configuration parameter buffpage only works for buffer pools with buffer size set to-1.26. When multiple fields are not used by using

DB2 database OptimizationWork is very important. This article describes several basic strategies for DB2 database optimization. 1. Create an index for the tables used in the future (note that the index is created before data insertion or after data insertion but runstats is required ): Note: if data is created before insertion, indexes will also be updated during