The IBM DB2 Enterprise Server Edition is a relational model database server developed by IBM. It primarily runs on Unix (namely AIX), Linux, IBM i (formerly OS/400), z/OS and Windows servers.

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db2 range partitioning attach and detach issue

We have a table which is used in many select Queries, as it is be accessed by customers to fetch their information. Also they can change their information too whenever they want. We had to retrieve ...
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2answers
1k views

Stored Procedures Best Practices: Fenced or Unfenced?

I believe I understand the reasons behind fenced and unfenced stored procedures. Fenced run "outside" of the database (in our case DB2) so as to prevent possible corruption of the database engine ...
2
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4answers
5k views

What is the purpose of having a table NOT LOGGED INITIALLY

I came across this recently. When defining a table in DB2 LUW (at least 9.5 or higher), you can define it as NOT LOGGED INITIALLY. Example from the book I read: CREATE TABLE products ( productID ...
2
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2answers
996 views

Syntax changes between DB2 for i (DB2/400) v5r4 and v6r1

Does anyone know where can I find list of syntax changes between DB2 for i v5r4 and v6r1? We are currently migrating a backing database for an application from DB2 for i v5r4 to v6r1 and found out ...
2
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1answer
768 views

Does DB2 have equivalents for Oracle's UTL_ENCODE and UTL_RAW modules?

I'm looking for something similar to: utl_smtp.command(conn, utl_encode.base64_encode(utl_raw.cast_to_raw(<username>))); I couldn't find any reference among the DB2's system-defined modules ...
0
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1answer
584 views

Preloading a Java library in DB2, similar to ORACLE's loadjava

Edit to add details to clarify, based on Chris' comment: A Java stored procedure depends on external libraries. Locally it compiles successfully, since they are added to the classpath. But when ...
2
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2answers
693 views

What is the recommended Buffer Pool size on a 2GB RAM PC?

I installed DB2 Express-C on a PC with 2 GB RAM and running Windows Server 2008 R2 OS. While creating a new database, there is an option to set Buffer Pool size with default set to 4K. How much is ...
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1answer
322 views

Important distinctions between DBMSs [closed]

DBA is a career I'm strongly considering after school, but my limited experience mostly involves some PL/SQL Oracle web programming, some basic PHP/MySQL web pages, and some queries in SQL Server. ...
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1answer
361 views

Analyzing TCB Index Status for DB2

The Following is the TCB index that I could get using a command for my DB2 database. I don't know how to analyze it. Which columns are important? What do they mean? TCB Index Stats: Address ...
7
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1answer
13k views

What exactly is binding in DB2?

I recently crossed over from being a Java developer to an actual DBA in our company. I am learning the ropes, so to speak, about being a DBA (which is actually somewhat of a new position for our ...
6
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1answer
13k views

Cannot connect to DB2 database after restoring an offline backup

This is for DB2 9.7 Enterprise Server Edition on AIX. I had a full, offline backup taken of several databases within our instance in a performance environment. I wanted to restore these databases to ...
4
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2answers
2k views

DB2 Express-C on Mac OS X

I have followed all the steps described on the Getting Started with DB2 Express v9.7 e-book and installed DB2 Express-C on my Mac. The installation succeeded without a problem. I did setup OS X ...
3
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1answer
4k views

DROP SCHEMA in db2

How do I drop a schema in db2 if it has got some objects in it? db2 DROP SCHEMA SCHEMA_NAME For some reason I am not able to drop the tables in the schema, so how can I force to drop the ...
5
votes
1answer
2k views

How do I resolve this data source connection issue with Cognos?

We have (fairly recently) installed IBM's Cognos 10 as our business intelligence reporting tool. Most of the databases that we report over are DB2 9.7 LUW Enterprise Edition. We installed the DB2 ...
5
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2answers
3k views

Why do I get leading zeros when converting from decimal to char in a db2 query?

I have a column named length defined as: TYPE_NAME: DECIMAL DATA_TYPE: 3 COLUMN_SIZE: 9 BUFFER_LENGTH: 11 DECIMAL_DIGITS: 5 NUM_PREC_RADIX: 10 When I run the following select: select ...
2
votes
1answer
727 views

copy schema across different physical databases in db2

Is there any way to programatically copy across schema (i.e. tables,functions,views) etc from one database over to another one. Assuming both are running same versions of DB2. I found a few utilities ...
1
vote
1answer
96 views

Are there any guidelines for the “IBM Premier Level Business Partner”? [closed]

Our company currently subcontracts a DB2 project to a company which have "IBM Premier Level Business Partner". I was just wondering, are there any guideline about what they should provide (say, SQAP, ...
4
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2answers
1k views

What are the available options to backup DB2 Express-C?

I want to use DB2 Express-C edition with my application. I have never used DB2 but now want to use the Express Edition in a production environment to learn more about it. I want to know what are the ...
3
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1answer
3k views

DB2 9.5 How to get tablespace monitor information?

How can I get information about tablespace in DB2 9.5? I need to review information about if the autoresize option is enabled or disabled.
2
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2answers
1k views

In DB2, how can I disable NLJOIN?

I want to indicate to the optimizer, via SET or optimization profiles, that NLJOIN shouldn't be used at all when optimizing a query. I've been looking for this for a while without any success. I ...
4
votes
1answer
274 views

can i backup multiple db2 databases at the same time?

in db2 9.5 LUW i have one db instance to which i just added a second database. we don't have TSM or multiple partitions which is what all the documentation seems to be about when i search the web for ...
4
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1answer
1k views

How to UPDATE just one record in DB2?

In DB2, I need to do a SELECT FROM UPDATE, to put an update + select in a single transaction. But I need to make sure to update only one record per transaction. Familiar with the LIMIT clause from ...
6
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3answers
3k views

DB2 equivalent for MySQL's DROP .. IF EXISTS

Is there an equivalent in DB2 for MySQL's (or PostgreSQL's): DROP TABLE IF EXISTS sometable;
13
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1answer
276 views

Term for a one-row table?

Is there a specific term to describe a relation with a cardinality of one? I'm thinking particularly of RDBMS "special" one-row tables, for example, DUAL (Oracle), SYSIBM.SYSDUMMY1 (DB2, Derby) and ...
2
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2answers
636 views

Generalisation in databases

I am working on a Hospital Management project in DB2. I have one table for staff with a primary key of staff_id. The hospital has to have different staff... e.g doctors,nurses,e.t.c. Is it better to ...
2
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1answer
1k views

DB2: database hangs while trying to execute simple select query on specific table

No errors or warnings, database just hangs while trying to execute simple select query on specific table. Other tables are accessible until I trying to query specific (faulty) table. This should not ...
2
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2answers
1k views

altering a db2 table with huge amount of data

I have a table in DB2 which is having 99 columns and 900,000 records of data. I want to alter the table with one extra column as below: ALTER TABLE MYSCHEMA.PRODUCT ADD UPDATE_DT DATE However, the ...
5
votes
1answer
192 views

Will I need more system resources to run DB2 instead of MySQL?

I need to convert my web application from MySQL to run on DB2. I need to know in advance whether I will need a high spec server to ensure the web application performs at the same speed as it does now ...
4
votes
3answers
865 views

Single versus Multiple databases

I am working on a hospital management system using DB2 with pureXML. Is better to use a single database for all the data (patient, doctor details, appointments, history, medicines, etc) or to use ...
3
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1answer
5k views

How to find out what caused the database(DB2) in a locking state

I know how to check the DB is in a lock state or not, but my question is how to find out which query caused the lock on table /db. IS there any log file getting created if something unexpected ...
2
votes
1answer
340 views

In DB2, what are the alternative ways of evaluating an index's (or several indexes) benefit?

I'm trying to evaluate different approaches to analyzing the benefit of changing the set of indexes that are available. If I pick some representative queries from my workload, I can run EXPLAIN and ...
5
votes
1answer
34k views

How do I grant all privileges to local db2admin with DB2 9.7 on Windows?

I have as my developer station a laptop with OS Windows XP Professional Edition, Service Pack 3. I have downloaded and installed IBM DB2 UDB 9.7 fix pack 4, of the Express-C edition. I have a local ...
3
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1answer
519 views

What is object Server?

As I was reading article I came across IBM's site about object Server. What actually is Object Server and what are it's uses? Can this be explained for a beginner?
2
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1answer
566 views

Can High Water Mark be cleared?

Lately I experience below errors when restoring db2 database SQL2043N Unable to start a child process or thread SQL1084C Shared memory segments cannot be allocated db2stop and then db2start ...
6
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2answers
2k views

Is DB2 more reliable and stable compared to PostgreSQL or MySQL?

Always i was using MySQL or PostgreSQL for my projects such as Web/Desktop apps. I had data loss few times and thanks to old backup i was always up and running. But for a recent project for Airport, ...
4
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2answers
2k views

DB2: Error when using NOT EXISTS with SYSIBM.DUAL in a batch query

I have data in a java object as data1, data2. data1 and data2 together forms a composite key in myTable where I want to insert the object. The writing is happening as a batch. Like 10 insert ...
3
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1answer
79 views

Can you control what tags are used in an XML column?

We allow our developers to use XML columns to store data. We want to provide standard names to XML tags. As a DBA, can we prevent the users from adding XML tags that are not predefined?
6
votes
7answers
3k views

On DB2, who updated a record and what did the record look like before the update?

(SQL Server 2008 R2 Standard, database under full recovery) I have a table with fields id, firstname, lastname. A statement is executed: insert into dbo.sometable (id, firstname, lastname) values ...
3
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1answer
734 views

Help with DB2 Procedure

I have the following query: CREATE PROCEDURE MYPROC( IN @TABLES VARCHAR(500)) DYNAMIC RESULT SETS 1 LANGUAGE SQL SPECIFIC MYPROC NOT DETERMINISTIC MODIFIES SQL DATA CALLED ON NULL INPUT BEGIN ...
6
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3answers
1k views

DB2 passwords with special characters

Our DB2 authentication is integrated with active directory, so the allowed passwords are controlled by it's policy. We have some users that are not being able to connect to the database through ...
6
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3answers
6k views

How can you tell if a table in DB2 has a Primary Key?

We are using a tool that requires specific tables in our DB2 database to have a Primary Key defined. Is there a way using a select statement on the DB to see if a given table has one? Thanks.
3
votes
2answers
2k views

What specific tests need to be performed under Database migration from DB2 to Oracle?

Currently I am going to be testing (I am a Data Analyst) of a larger migration project where they are planning to migrate from DB2 to Oracle. My question may be little broader; however any ...
5
votes
1answer
1k views

Is there a way to edit the System Database Directory for DB2 to remove a database?

We have a case where we want to try to get rid of a database. The database still exists on disk and when we catalog it, it re-appears in the Database Manager. But when we try to do a DROP on it, it ...
1
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1answer
544 views

What are the best practices for ETL of data from one OLTP system to another, Part 2?

Ok, I originally started a question a ways back called "What are the best practices for ETL of data from one OLTP system to another?". And as you can probably tell from most of my questions so far, ...
2
votes
2answers
3k views

DB2 Trigger: only update current row

I've created following trigger : CREATE TRIGGER probeer2 AFTER INSERT ON libtn01leb.kofax_release FOR EACH ROW UPDATE libtn01leb.kofax_release SET RRNR='bleh' This trigger will update EVERY ...
2
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1answer
983 views

What are the best practices for ETL of data from one OLTP system to another?

First off, I want to post that I am a developer and not a DBA, so I am trying to approach this from the standpoint of what is the best thing to do, rather than just assuming I can do everything ...
4
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2answers
523 views

What is the best practice for mapping from natural keys to integer-based keys? (ETL)

This question originates more from an "enterprise architecture" point of view. (Reason being, our company is just starting to get into data management, and actually having DBA's -- I know, horrific ...
2
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1answer
244 views

How do you convert IBM DB2's recursive increment to MySQL version?

DB2 Queries: WITH TABLE1 (YEAR_END) as( VALUES (2011)) , TABLE2 (YEAR_END) AS ( VALUES(2011)) , TABLE3 (YEARS) AS ( SELECT 0+2008 FROM TABLE1 T1, TABLE2 T2 union ...
2
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1answer
2k views

Migration from DB2 to MySQL

Does any one have experience on migration from DB2 to MySQL ? Please share with me. I tried googling, but I have not received much information on this.
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0answers
70 views

If anyone has experience about bugs ,problems or any related link of DB2 v.10 FOR ZOS , please reply? [closed]

Hi I want to use db2 10 for zos. If anyone has experience about bugs ,problems or any related link of DB2 v.10, please reply? thanks for your attention.