search
HomeDatabaseMysql TutorialDB2数据库运维常用命令集锦

在执行如下命令时,需要首先在客户端运行中输入db2cmd进行初始化或者su到db2的实例下操作。

在执行如下命令时,需要首先在客户端运行中输入db2cmd进行初始化或者su到db2的实例下操作。

一、常识性命令

1、db2 connect to     --连接到本地数据库名

  db2 connect to user using --连接到远端数据库

2、 db2 force application all      --强迫所有应用断开数据库连接

3、db2 backup db db2name  --备份整个数据库数据

  db2 restore db                      --还原数据库

4、db2 list application --查看所有连接(需要连接到具体数据库才能查看)

5、db2stop --停止数据库  db2start    --启动数据库

6、create database using codeset utf-8 territory CN    --创建数据库使用utf-8编码

7、db2 catalog 命令

db2 catalog tcpip node remote server   --把远程数据库映射到本地接点一般为50000

db2 catalog db as   at node PUB11                       --远程数据库名称到本地接点

db2 CONNECT TO user using                                --连接本地接点访问远程数据库

8、数据库导出

db2look -d -u -e -o .sql        --导出数据库的表结构,其中用户空间一般为

db2admin/db2inst2

db2look -d -u -t   -e -o .sql   --导出数据库中表1和表2的表结构

db2move export              --导出数据库数据

db2move export -tn ,       --导出数据库中表和表数据

9、数据库导入

db2 -tvf  .sql       --把上述导出的表结构导入到数据库表结构

db2move load -lo replace   --把上述“db2move export “导出的数据导入到数据库中并把相同的数据替换掉

在实际使用过程中,如果用到db2自增主键,需要使用by default, 而不是always,,功能是一样的,但这样在数据移植时候会很方便!

10、db2 connect reset 或 db2 terminate    --断开与数据库的连接

11、db2set db2codepage=1208        --修改页编码为1208

12、db2 describe table        --查看表结构

13、db2 list tables                            --查看数据库中所有表结构

     db2 list tables for system                  --列出所有系统表

14、db2 list tablespaces                  --列出表空间

15、fetch first 10 rows  only   --列出表中前10条数据

例如:select * from fetch first 10 rows only

16、coalesce(字段名,转换后的值)       --对是null的字段进行值转换

例如:select coalesce(id,1)  from     --对表中id如果为null转换成1

二、导入数据:

1、 以默认分隔符加载,默认为“,”号

    db2 "import from btpoper.txt of del insert into btpoper"

2、 以指定分隔符“|”加载

    db2 "import from btpoper.txt of del modified by coldel| insert into btpoper"

三、卸载数据:

1、 卸载一个表中全部数据

    db2 "export to btpoper.txt of del select * from btpoper"

    db2 "export to btpoper.txt of del modified by coldel| select * from btpoper"

2、 带条件卸载一个表中数据

    db2 "export to btpoper.txt of del select * from btpoper where brhid='907020000'"

    db2 "export to cmmcode.txt of del select * from cmmcode where codtp='01'"

    db2 "export to cmmcode.txt of del modified by coldel| select * from cmmcode where codtp='01'"

四、查询数据结构及数据:

    db2 "select * from btpoper"

    db2 "select * from btpoper where brhid='907020000' and oprid='0001'"

    db2 "select oprid,oprnm,brhid,passwd from btpoper"

五、删除表中数据:

    db2 "delete from btpoper"

    db2 "delete from btpoper where brhid='907020000' or brhid='907010000'"

六、修改表中数据:

    db2 "update svmmst set prtlines=0 where brhid='907010000' and jobtp='02'"

    db2 "update svmmst set prtlines=0 where jobtp='02' or jobtp='03'"

七、联接数据库

    db2 connect to btpdbs

八、清除数据库联接

    db2 connect reset    断开数据库连接

    db2 terminate        断开数据库连接

    db2 force applications all    断开所有数据库连接

九、备份数据库

1、 db2 backup db btpdbs

2、 db2move btpdbs export

    db2look -d btpdbs -e -x [-a] -o crttbl.sql

linux

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
How do you handle database upgrades in MySQL?How do you handle database upgrades in MySQL?Apr 30, 2025 am 12:28 AM

The steps for upgrading MySQL database include: 1. Backup the database, 2. Stop the current MySQL service, 3. Install the new version of MySQL, 4. Start the new version of MySQL service, 5. Recover the database. Compatibility issues are required during the upgrade process, and advanced tools such as PerconaToolkit can be used for testing and optimization.

What are the different backup strategies you can use for MySQL?What are the different backup strategies you can use for MySQL?Apr 30, 2025 am 12:28 AM

MySQL backup policies include logical backup, physical backup, incremental backup, replication-based backup, and cloud backup. 1. Logical backup uses mysqldump to export database structure and data, which is suitable for small databases and version migrations. 2. Physical backups are fast and comprehensive by copying data files, but require database consistency. 3. Incremental backup uses binary logging to record changes, which is suitable for large databases. 4. Replication-based backup reduces the impact on the production system by backing up from the server. 5. Cloud backups such as AmazonRDS provide automation solutions, but costs and control need to be considered. When selecting a policy, database size, downtime tolerance, recovery time, and recovery point goals should be considered.

What is MySQL clustering?What is MySQL clustering?Apr 30, 2025 am 12:28 AM

MySQLclusteringenhancesdatabaserobustnessandscalabilitybydistributingdataacrossmultiplenodes.ItusestheNDBenginefordatareplicationandfaulttolerance,ensuringhighavailability.Setupinvolvesconfiguringmanagement,data,andSQLnodes,withcarefulmonitoringandpe

How do you optimize database schema design for performance in MySQL?How do you optimize database schema design for performance in MySQL?Apr 30, 2025 am 12:27 AM

Optimizing database schema design in MySQL can improve performance through the following steps: 1. Index optimization: Create indexes on common query columns, balancing the overhead of query and inserting updates. 2. Table structure optimization: Reduce data redundancy through normalization or anti-normalization and improve access efficiency. 3. Data type selection: Use appropriate data types, such as INT instead of VARCHAR, to reduce storage space. 4. Partitioning and sub-table: For large data volumes, use partitioning and sub-table to disperse data to improve query and maintenance efficiency.

How can you optimize MySQL performance?How can you optimize MySQL performance?Apr 30, 2025 am 12:26 AM

TooptimizeMySQLperformance,followthesesteps:1)Implementproperindexingtospeedupqueries,2)UseEXPLAINtoanalyzeandoptimizequeryperformance,3)Adjustserverconfigurationsettingslikeinnodb_buffer_pool_sizeandmax_connections,4)Usepartitioningforlargetablestoi

How to use MySQL functions for data processing and calculationHow to use MySQL functions for data processing and calculationApr 29, 2025 pm 04:21 PM

MySQL functions can be used for data processing and calculation. 1. Basic usage includes string processing, date calculation and mathematical operations. 2. Advanced usage involves combining multiple functions to implement complex operations. 3. Performance optimization requires avoiding the use of functions in the WHERE clause and using GROUPBY and temporary tables.

An efficient way to batch insert data in MySQLAn efficient way to batch insert data in MySQLApr 29, 2025 pm 04:18 PM

Efficient methods for batch inserting data in MySQL include: 1. Using INSERTINTO...VALUES syntax, 2. Using LOADDATAINFILE command, 3. Using transaction processing, 4. Adjust batch size, 5. Disable indexing, 6. Using INSERTIGNORE or INSERT...ONDUPLICATEKEYUPDATE, these methods can significantly improve database operation efficiency.

Steps to add and delete fields to MySQL tablesSteps to add and delete fields to MySQL tablesApr 29, 2025 pm 04:15 PM

In MySQL, add fields using ALTERTABLEtable_nameADDCOLUMNnew_columnVARCHAR(255)AFTERexisting_column, delete fields using ALTERTABLEtable_nameDROPCOLUMNcolumn_to_drop. When adding fields, you need to specify a location to optimize query performance and data structure; before deleting fields, you need to confirm that the operation is irreversible; modifying table structure using online DDL, backup data, test environment, and low-load time periods is performance optimization and best practice.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor