db2 sequence

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. The following is a detailed description of the 10 most popular e-commerce OLTP applications that use DB2 UDB in Unix, Windows, and OS2 environments. Hchao, a mod

Label:Check archiving processing View Log Archive status DB2 "Select Date (CAST (start_time as TIMESTAMP)) as DATE, COUNT (*) as Number_of_logs_per_day, (Count (*) *23.4375) as AMOUNT_LOGS_DAY_MB, Dbpartitionnum as Dbpart From Sysibmadm. Db_history WHERE operation = ' X '--Archive logs and Operationtype = ' 1 '--1 = First Log archive method and TIMESTAMP (end_time) > Current_timestamp-10 days GROUP by DATE (CAST (start_time as TIMESTAMP)), Dbpartition

Tags: order oracle create modify ACL Replace. com Note NoCachesequence : Is an object provided by Oracle that produces a unique numeric value, primarily for use with a single primary key of a table. To Create a sequence : Create sequence seq_name//naming Start with 1//initial value Increment by 1//increment value MinValue 1//minimum value, default, system default MaxValue 999999999999999999//maximum value,

MySQL implementation sequence effectThe general sequence (Sequence) is used to process primary key fields, and there is no sequence in MySQL, but MySQL provides self-growth (increment) for similar purposes, but only self-increment, and cannot set step size, start index, loop, etc. The most important thing is that a tab

This article mainly tells you about the actual operating scheme of the DB2 V8 database system transfer, and installs DB2 v9 on the system with the old version of the DB2 database installed, migrate all related instances and database systems of the old version to DB2 V9 and port the

sequence. A string includes a CHAR (n) type fixed-length string and a variable-length string of the VARCHAR (n), long varchar, or CLOB (n) type. The length of a string is the number of bytes in the sequence. Fixed Length string, CHARACTER (n) or CHAR (n): the length of a fixed length string is between 1 and 254 bytes. If the length is not specified, it is regarded as 1 byte. Variable-length string. A strin

. Synonym migration 1. solution:Write a script separately, for example, create alias alias_name for table_name.Iii. Sequence migration 1. Sequence in DB2 can be in two forms: (1) It exists independently like an ORACLE database. (2) similar to SYBASE databases, they can be defined in Table fields. 2. solution:Because the upper limit of ORACLE

PS: Need to enter DB2 's account before executing the command: Su db2inst1Modify Password: Change the corresponding operating system password, Windows can change db2admin password, linux change db2inst1 password can be, DB2 's database password is tied to the operating system, as you can say, only need to modify the user's password on the operating system. You want to change that user's password, you change

1. Disable DB2Db2stop or db2stop force.In the script, write both of them to avoid using the db2stop force command, for example:Db2stopDb2stop force2. Start DB2Db2start3. view the local node directoryDB2 list node directory4. cataloguing a TCP/IP NodeDB2 catalog TCPIP node 5. node CataloguingDB2 catalog TCP node node_name remote server_ip server server_port6. node deserializationDB2 uncatalog node node_name7. Cancel node CataloguingDB2 uncatalog node 8. Test node attachmentDB2 attach to node_name

Today, the customer visited (Japanese) and asked me the difference between DB2 and Oracle. Because it's not a DBA, I haven't really summed it up. But my first feeling: One is instance, one is database. Building Ora libraries and DB2 libraries is not the same. It's really はずかしい. System Architecture Overview First, we need to understand the architecture used by Oracle and understand how it differs from

Operation commands in the db2 database Common DB2 commands. For more information about using db2, see. The management Client no longer has a control center after v9.7, but uses the Data Studio Client. The license key is not applied during the installation of the DB2 database product. However, the following products do

A binary tree is known to have N (n>0) a different node, the first sequence is a0a1a2....an-1, and the sequence is b0b1b2...bn-1. Because during the first sequence traversal, the root node is accessed, followed by the left subtree, and finally the right subtree. Therefore, the A0 must be the root node of the two-fork tree, and the A0 must also appear in the

Label:Oracle modified sequence (Sequence) Start Value method The Oracle sequence (Sequence) is primarily used to generate serial numbers, which are often used in applications, especially as ID values, which are used to make table primary keys. However, sometimes when you need to modify the

How can we create a database in DB2? This is a problem that many new users who are familiar with DB2 databases often mention. The following describes how to create a database in DB2. Create a database in DB2: When a database is created, the following tasks are performed: ● Set all system cataloguing tables required

consistency. The importance of concurrency control Without an effective method of controlling concurrency, data integrity and consistency can be compromised. The DBMS must protect the database to prevent the following conditions from occurring: Lost Updates--suppose application A and application B read the same row in the database at the same time, and all the new values are computed for one of the columns. If application a first updates the row with its new value, and then application B upd

@ Algorithm Learning The problem is: based on sequence traversal sequences + middle sequence traversal sequence, only one tree is established, then the pre-order and sequential traversal sequence are output. The four ways of traversing the tree and the code naturally do not have to speak much, and it is interesting how

Tags: default change plain out set GES and not definedDB2 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, I've summarized a troubleshooting process for our customers, users, and

* fromsysibm. SYSFUNCTIONS34. How do I know the number of views under a user?Select * fromsysibm. sysviewsWHERECREATOR = 'user'　　 35. How do I know the current DB2 version?Select * fromsysibm. sysvERSIONS　　 36. How do I know the number of triggers under a user?Select * fromsysibm. SYSTRIGGERSWHERESCHEMA = 'user'　　 37. How do I know the status of TABLESPACE?Select * fromsysibm. SYSTABLESPACES　　 38. How do I know the

? Select * fromIWH. USERFUNCTION Select * fromsysibm. SYSFUNCTIONS 34. How do I know the number of views under a user?Select * fromsysibm. sysviewsWHERECREATOR = 'user'　　 35. How do I know the current DB2 version?Select * fromsysibm. sysvERSIONS　　 36. How do I know the number of triggers under a user?Select * fromsysibm. SYSTRIGGERSWHERESCHEMA = 'user'　　 37. How do I know the status of TABLESPACE?Select * fromsysibm. SYSTABLESPACES　　 38. How do I kno

On a Linux or UNIX machine, set up multiple DB2 systems before DB2forLinux, UNIX, and andWindowsVersion8, SAP customers can only install on one physical machine On a Linux or UNIX machine, set up multiple DB2 systems before DB2 for Linux, UNIX, and Windows Version 8, SAP customers can only install on one physical machine One Linux or UNIX Machine Sets multip