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.

learn more… | top users | synonyms (1)

2
votes
1answer
52 views

CPU Utilization by Long running Query

Is there any way to find how much CPU is getting consumed by a query running for long time in Database?
2
votes
1answer
257 views

DB2 cookbook by Graeme Birchall?

Not sure if this question is appropriate here but I believe that it is of some interest for the db2:ers of the site. Once upon a time the DB2 Cookbook by Graeme Birchall could be downloaded from: ...
2
votes
1answer
416 views

delete records in one table based on multiple column values in second table

I need to insert and delete records in table 1 based on the data in multiple columns in table 2 Example: Table1 and Table2 have identical columns = address, city, state, zip Table1 is the master ...
2
votes
2answers
102 views

DB2 10.5 - When inserting, the database is trying to reuse index keys on GENERATE ALWAYS

I am trying to insert a row into a database table which has a GENERATED ALWAYS primary key column. The table has over 1000 rows, and the primary keys start at 1. When I try to do an insert, the error ...
2
votes
2answers
521 views

Why do I get this error in a query with SUM?

I have a query that is the following: SELECT CMSTKY AS Customer, CMNAME AS BusinessName, WKMDL# As Model WKSLD# AS Sales FROM GPCMP INNER JOIN GPCM1P ON GPCMP.CMSTKY = ...
2
votes
2answers
1k views

When is it appropriate database design to use a separate schema?

I am developing a database which has data sourced from many different applications. In my first pass at design, I placed the staging tables each in a schema named for their source application. As ...
2
votes
1answer
6k views

How to loop through AS400 table with cursor

I have a AS400 table that contains multiple rows per person. Each row contains data concerning a transaction by the person including points assigned to each transaction. I read through all rows for ...
2
votes
1answer
3k views

How to restore IBM DB2 database from AIX to Windows?

I had made backup from remote IBM DB2 server in AIX using this command: ./db2 backup database DBEMP to /home/dbemp/backup Then I grab the backup file using FTP Client from my Windows. I run this ...
2
votes
1answer
8k views

How to run DB Admin Tool (GUI) in IBM DB2 Express-C?

I had installed IBM DB2 Express-C in Windows but I can't find any shortcut to launch the Administration Tools (GUI). When installing, I had selected "Administration Tool" option (I had checked twice ...
2
votes
1answer
977 views

IBM DB2 9.7, possible to temporarily disable transaction logs?

I want to clean the whole database, so I am dropping all tables and DB objects in two FOR loops, within one transaction. This makes the transaction logs become full. I could increase the transaction ...
2
votes
2answers
11k views

Do I need to RUNSTATS after a REORG in DB2?

The REORG documentation says: BUILD Builds indexes. Updates index statistics. But I have always heard REORG/RUNSTATS as if they should be paired. Can anyone verify that "Updates index ...
2
votes
1answer
1k views

How to choose working database in DB2?

In SQL server I can use the USE statement to switch between working databases. Is there a similar command for DB2?
2
votes
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 ...
2
votes
1answer
1k 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 ...
2
votes
1answer
94 views

Can I set order of query execution?

Below query is executing in approx 5 min: SELECT COUNT(distinct B.CALL_ID), C.IVR_APPLN_NAME FROM PTDT.TDT_CALL_DATA AS A, PTDT.TDT_IVR_CALL_APPLICATIONS AS B, ...
2
votes
1answer
199 views

How to know db size by the backup? in DB2

I want to add validation for free space before restore a db2 database. I have the *.001 backup file (compressed). How do I check the estimate db size of that backup? I can't estimate because the ...
2
votes
1answer
105 views

How to fix DB2 Unsupported functionality: GENERATED BY DEFAULT

On IBM DB2 I try the following direct SQL: CREATE TABLE users ( user_id INT NOT NULL GENERATED BY DEFAULT AS IDENTITY (START WITH 1), user_name VARCHAR(16) NOT NULL, email_address ...
2
votes
1answer
95 views

How do I modify a stored procedure in IBM DB2?

I have a DB2 database and I'm using Control Center. I've found a procedure in the 'Stored Procedures' folder, which I need to modify. In MS SQL Server and Oracle you can accomplish this right from the ...
2
votes
1answer
728 views

How to ignore sql errors in stored procedure ? (Not handle)

I have a list of records I want to process and the cursor iterates through them from a table. The procedure just exits when it hits an insert statement and it fails. Is there a way I can ignore the ...
2
votes
1answer
584 views

Has some command that lists the privileges of a user in db2?

I'm using db2 9.7 on linux and i want to list my privileges on database... Ex: SYSADM, SECADM, DBADM, etc. So, has some command in db2 that lists the privileges of a user in db2?
2
votes
1answer
819 views

db2 removal of Generate always Expression on Timestamp data type

I have a column UPDATE_TIME with an expression TIMESTAMP NOT NULL GENERATED ALWAYS FOR EACH ROW ON UPDATE AS ROW CHANGE TIMESTAMP How to remove the Generated always for timestamps? I tried ...
2
votes
1answer
4k views

Create new Read Only user on DB2 on the whole database

I am an oracle/sql server DBA having limited knowledge in IBM DB2. We have DB2 9.7 fp4 running on AIX 6. I would like to create a new user and grant him READ only privilege on a particular database. ...
2
votes
2answers
940 views

SQL3550W: … target column has been defined as GENERATED ALWAYS

I am trying to export + import data from a table in a db2 database to another. But while running the export command I am getting the following error. SQL3550W The field value in row "26" and column ...
2
votes
2answers
667 views

How can I automate copying DB2 table data between remote Servers?

I have two IBM DB2 servers at separate remote locations. I need to copy data from several tables on one database on the first server to another database in the second server. Previously I've used ...
2
votes
3answers
2k views

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 ...
2
votes
2answers
785 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 ...
2
votes
1answer
2k 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
votes
1answer
417 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 ...
2
votes
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.
2
votes
1answer
24 views

How to use a CASE expression in the WHERE clause?

I am using a CASE expression in my WHERE clause like this: SELECT * FROM ASPECT.WR_AM_ADT_SUMM INNER JOIN ASPECT.WR_AM_DLR_DTL ON AS_CNTRY_CD = DD_CNTRY_CD AND AS_DLR_CD = ...
2
votes
1answer
33 views

DB2 : Load from cursor Dynamic query

We need to move multiple tables using Load from cursor. But the number columns in the source and destination tables are not the same. Also the tables structures can change so we need the same to ...
2
votes
1answer
113 views

indexing strategies

I am confused by indexing strategies advocated by one of the database products. Database is "DB2 for i" (iSeries/AS400). Please see following SQL and index advised by the product for the SQL. There ...
2
votes
1answer
158 views

How to use a variable date when running a db2 command in a shell script?

I need to use a date variable in a select, like bellow, but I'm getting this error: Expected tokens may include: "". SQLSTATE=42601 How can use these variables in a shell script? ...
2
votes
2answers
141 views

DB2 sorting by lowercase uppercase - problem

I'm struggling with DB2 - sorting by Polish letters with diacritics and uppercase/lowercase. When I created a database using: CREATE DATABASE P1DS8 AUTOMATIC STORAGE YES ON '/home/db2inst1' DBPATH ...
2
votes
1answer
403 views

How to change the owner of a Stored Procedure in DB2?

Let's say that I have a procedure called schema.proc1. How do I change the owner of it? I'm using db2 express-c 10.5 I've tried the following command running as the olduser, transfer ownership of ...
2
votes
1answer
151 views

How to apply a regex on a column fetched from DB

I am using IBM DB2. So, I am retrieving a column named SSN from a table. I have to apply the following regex on that column: ([1-57-8][0-9]{2} |0([1-9][0-9] |[0-9][1-9]) |6([0-57-9][0-9] ...
2
votes
1answer
554 views

db2 performance issue - large number of IOPS how to determine problem?

DB2 database is on storage. We are using 9.7 Storage administrators reported that today database was doing 5000 IOPS (during past days average number was 300 IOPS). Those are disk operations from ...
2
votes
1answer
2k views

creating PKs for existing tables - altering column constraints

I am quite new to DB2, so I googled around how to ask questions correctly and so I hope I can provide all necessary information. I have an existing table A1230922.CALSONW with several (195) columns ...
2
votes
1answer
48 views

DB2 MQT not rewriting role playing columns

If in a MQT, if I have 2 referential constraints to the same table (role playing) , usage of one of the constraints doesnt allow the query to be optimized Example FACT_SALES DIM_BILL_TO_ID --> ...
2
votes
2answers
9k views

INSERT INTO with SELECT subquery db2 9.5

I have the following query that takes 4 seconds to execute: SELECT TX.* FROM TABLE_X TX INNER JOIN TABLE_Y TY ON TY.VALUE_ID = VALUE_ID_IN AND TY.PROD_ID = TX.PROD_ID WHERE (TX.PLACE_ID1 ...
2
votes
1answer
271 views

How efficiently does iSeries DB2 use index with WHERE <>?

MS SQL dev here, this is my first attempt to optimize a DB2 query on iSeries. I was asked to help improve a huge query which consists entirely of dozens of joined subselects. Some of those subselects ...
2
votes
1answer
5k views

DB2 Communication link failure issue

I would like to get your valuable suggestions for the below problem. My Perl application connects to a DB2 database and keeps inserting data into a table. The application successfully inserts data ...
2
votes
1answer
1k views

DB2 Load Failure due to timestampformat

I'm trying to load a file into DB2 database table using DB2 Load. I'm able to load the file, using the following statement from the unix prompt. db2 +p -x load from BOM_Sales_20130326.txt of DEL ...
2
votes
1answer
2k views

DB2 Server Table Space Locked

At work we keep receiving the following DataException seemingly at random when one of our processes tries to write/access a table for one of our clients: com.ibm.db.DataException: A database manager ...
2
votes
1answer
2k views

How to create Buffer Pool in Database dedicated only for ONE BIG table?

I have table TICKET with 400K records in database (DB2). I wish to create one huge buffer pool which will be dedicated only to this one big table for faster response. What are the steps to do it? ...
2
votes
2answers
5k views

How to drop a DB2 instance when the instance owner was removed

This is a real sticky situation. I was handed over a machine (running an AIX 7.1), and my first task was to re-install DB2 server on it. But someone before me had conveniently removed an instance ...
2
votes
3answers
4k views

How do i subtract a number of days from a prepared statement parameter in db2?

I have a C# application using OLEDB to connect to a DB2 database. Basically, I want to do this: SELECT CALC.WEEK, COUNT(CALC.ID) AS TRANSACTIONS , SUM(CALC.SUBTOTAL) AS REVENUE FROM ( ...
2
votes
1answer
3k views

DB2 Express on Windows 7 - Disable security?

I'm trying to install DB2 Express-C on my PC (Windows 7 pro), but no matter how I've installed or configured it, I can't grant the ability to create databases to my windows domain account. No matter ...
2
votes
1answer
236 views

DB2 Count problem

We have a query that returns over 20,000 rows on some occasions but times out due to the large amount of data. We have written a COUNT(*) query to throw an error if the record count is more than ...
2
votes
1answer
527 views

DB2: Is it good to create the LONG table space to use 32 KB data page

Our DB2 database(V9.7) has only defined one table space to store all the big object like xml. And xml size could be different. Some are about 2kb average. And some are 7kb average. So does it make ...