as data locks) Lock. From the perspective of the lock granularity (the size of the Lock Object), Oracle DML locks have two levels: Row-level locks and table-level locks.3.1 Oracle TX locks (Row-level locks and transaction locks)Many technical staff who are not familiar with Oracle may think that each TX lock represents a blocked data row. The original meaning of TX is Transaction. When a Transaction executes data changes (Insert, Update, Delete) for
Tags: DB2 database deadlock lock timeoutanalysis and explanation of DB2 lock problemLock timeouts and deadlocks are often encountered in DB2 applications, so what is the cause of this phenomenon? In this paper, the phenomenon of lock waiting, lock time-out and deadlock is simulated in the form of experiment, and the root cause of these phenomena is given.Test env
| insert into btpoper"
Ii. Uninstall data:
1. unmount all data in a table
Db2 "export to btpoper.txt of del select * from btpoper"
Db2 "export to btpoper.txt of del modified by coldel | select * from btpoper"
2. unmount data from a table with conditions
Db2 "export to btpoper.txt of del select * from btpoper where brhid = '20140901 '"
There are many ways to replicate data in DB2 database, this paper mainly introduces a scheme of cloning DB2 data using fast disk replication technology (such as flashcopy, etc.). By using DB2 cloning Tool, you can minimize the actions that DBAs need to perform during the DB2 database cloning process. Make the entire pr
:
Code:
Cutester-mymm> DB2? List historyList history {backup | rollforward | reorg |Create tablespace | alter tablespace | dropped table | load |Rename tablespace | archive log}{All | since timestamp | containing {schema. object_name | object_name }}For [database] database-aliasNote: from the operating system prompt, prefix commands with 'db2 '.Special characters may require an e
instance. Assume that there is a Sample database under this instance.
Log on to the system with a user of this instance with SYSADM permissions, such as db2admin;
Run the db2 command line tool to execute the DATABASE migration command in this environment: MIGRATE database DATABASE-alias USER username USING password. Database-alias is the name or alias of the database to be migrated. Username is a user name with SYSADM permissions for authentication.
temporary tablespace exoasystmp in database partition group ibmtempgroup pagesize 8 K managed by system using ('/home/exoa2/exoasystmp ') extentsize 32 prefetchsize 16 bufferpool ibmdefault8k overhead 24.10 transferrate 0.90 dropped table recovery off;Create temporary tablespaceDB2 create user temporary tablespace stmaspace pagesize 32 K managed by database using (File 'd:/db2_tab/stmaspace. F1 '10000) extentsize 256Backup tablespaceBackup database yndc tablespace (userspace1) to "D:/Temp" with
To speed up the loading of data, many DBAs prefer to use the load tool for data migration and loading, but the load utility brings us some problems as well, and today focuses on the solution when we encounter problems when we use the Load tool again.As we all know, the load process is divided into 4 stages: Load/build/delete/index copy. The load phase is a format that parser the source files into the physical data store, directly into the page, not th
"Progressive DB2.DBA system Management, operation and application Case" (New) Reading notes 3Variables affecting the DB2 environmentBefore we had successfully installed the DB2 V9.7 Enterprise Edition with the wizard installed on the Windows platform, now we are not in a hurry to make specific DB2 operations such as cr
and data:Db2 "select * from puser"Db2 "select * from puser where brhid = '000000' and oprid = '000000 '"Db2 "select oprid, oprnm, brhid, passwd from puser"4. Delete table data:Db2 "delete from puser where brhid = '000000' or brhid = '000000 '"5. Modify Table data:Db2 "update svmmst set prtlines = 0 where brhid = '0000
DB2 specifications-log
8:40:23 on Tuesday morning 1. the overall specification keywords are capitalized, {} overall fast [] Option 1.2 note operator priority 1.3 Note link character 1.4 Delete duplicate row keyword distinct show 1.5 use dis [ribe] to indicate table structure 2. exercise 3. characters and dates must be included in single quotes. 3.1 characters in size. Sensitive date formats. 3.2 between a
information about the DB2 product installed, including the version and installation time.
Example:
%/Opt/ibm/db2/V9.1 _ 01/install/db2ls
Install Path Level FixPack Special Install Number Install Date
---------------------------------------------------------------
/Opt/ibm/db2/V9.1 _ 01 9.1.0.0 0 Tue Jul 11 14:28:33 2006 EDT
/Opt/ibm/
1. Disable db2
Db2stop or db2stop force.
In the script, write both of them to avoid using the db2stop force command, for example:
Db2stop
Db2stop force
2. Start db2
Db2start
3. Create a database
Db2 create db
Or db2 create db using codeset GBK territory CN
4. delete a databa
The following articles mainly introduce you to the basic DB2 commands and related knowledge that you must master as a beginner in DB2 database learning. We all know that you are in the DB2 database getting started course, some friends mentioned this question, and experts answered it and compiled it to help other friends learn and master it.
Common
restore the corresponding tablespace. You can also delete or recreate the corresponding tablespace and import the data. Errors related to the table status, solutions, and prevention after the database restore and rollforward are completed, when you check the status of each data table, you may find that some data table statuses are unavailable. The simple method is to filter the db2diag. log File and find the error message similar to the following. Er
"SELECT * from Puser where brhid= ' 907020000 ' and oprid= ' 0001 '"DB2 "Select OPRID,OPRNM,BRHID,PASSWD from Puser"Iv. Delete data from the table:DB2 "Delete from Puser where brhid= ' 907020000 ' or brhid= ' 907010000 '"Five, modify the table data:DB2 "Update svmmst set prtlines=0 where brhid= ' 907010000 ' and joww= ' 02 '"Vi. joining the databaseDB2 Connect t
TX lock, and the lock flag position of the actual locked data row (pointing to the TX lock), and on the other hand, the program or operator can also pass the lock Table statement to specify a type of TM lock to be obtained. The following table summarizes the cases in which the SQL statements in Oracle produce TM Locks:
Table VI: Summary of TM locks for Oracle databases
We can see that the usual DML operation (SELECT ...). For UPDATE, INSERT, update, DELET
DB2 Stored Procedure attribute description, db2 stored procedure description
ProcedureName: name of the stored procedure. It cannot exist in the same database mode.
Stored Procedure with the same name and number of parameters, even if the parameter type is different
(In | out | inout paramName dataType ,...) : Input parameters
In: input parameter, out: output parameter, inout: As input and output parameter
Fortunately, DB2 provides the related USEREXIT Program (also known as the user exit Program), which allows us to manage log files and has the possibility of extended functions. At this point, DB2 is obviously better than Orac.
Fortunately, DB2 provides the related USEREXIT Program (also known as the user exit Program), which allows us to manage log files and has
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