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DB2 Interview Questions
Questions Answers Views Company eMail

What is the maximum length of a column name in DB2? 18 or 30 or anything other than these?

4 17175

Can a primary key have null values? If we try to insert a null value in a primary key column, will it work or give an error code?

6 17750

Can a unique index have more than one null value? If not, what error code is given if an attempt is made to insert more than one null value?

3 5403

Is it possible to update a primary key value? If not, what is the error code given? If yes, can more than 1 primary key column be updated at a time?

8 21189

Hi i need to write a query on the following requirement. SELECT COMM_TEXT INTO :WS_MIKM_COMM_TEXT FROM MPIPROD.MIKMV01 WHERE ACCOUNT_NO = :WFD_ACCOUNT_NO AND (SUBSTR(COMM_TEXT,1,39) = :WS_COMMENT_TEXT AND SUBSTR(COMM_TEXT,47,14) = :WS_DENY_DESC) OR (SUBSTR(COMM_TEXT,1,39) = :WS_COMMENT_TEXT) The above query is to be modified. The requirement is if both the fields are equal then that has to be given priority. In the above query if it satisfies any one it comes out without checking if both being equal is possible.

1 2441

Suppose if I need to update a column, how you do that using cursor?


2 5944

Suppose the outcome of executing a query results in a row having null. Based on the answer how you use it? Its declaration and inclusion?


2 4267

For unmatched rows returned from an outer join, the column values in the other table are set to null e.g If A OUTER JOIN B returns some unmatched rows from A, the corresponding column values in B will be set to null. What can be done so that a null value is not displayed for these columns?

3 3923

How to define the a field which accepts value till 99999.99 in db2

3 6203

i want to know how the commit option works,how it save the changes? it will update the database or what ? where we can see these saved changes?

4 4396

I have 3 cursors declared. Cursor1 retieves some data. Based on this curso2 will also fetches some data. In cursor3 (using for some updation) I'm using the data retrieved by the above 2 cursor. My question is, while working with cursor3, periodically if I give commit, will all the three crsors will be closed or only cursor3 will be closed?

4 5615

How to resolve -805 error in DB2?

Cap Gemini,

1 27314

How to resolve -803 sql code in DB2?

Cap Gemini,

3 36516

How to resolve -818 sql code in DB2?

Cap Gemini,

2 18959

How to resolve -502 sql code in DB2?

Cap Gemini,

2 19197

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Un-Answered Questions { DB2 }

can any one provide me the link for the db2 v7 & db2 v8 manual for Z/os? i need to know about the syntax of REORG in both versions & need to know the difference as well


Before you give the explain statement, what are the prerogatives?


What is the latest version of ibm db2?


How many types of page locks can be held in db2?


What kind of database is db2?


What type of database is db2?


What is a db2 tablespace?


How do I optimize a query in db2?


What is the maximum number of columns in a db2 table?


I understand Join always perform better than subqueries. Then what is the advantage/use of Subqueries/correlated subqueries etc.,in DB2 programming.Please explain.


What is difference between alias and synonym in db2?


ther r 2 tables OTTABLE & SALTABLE, add the otamt from OTTABLE to empsal of SALTABLE if eid is matched else add the unmatched from OTTABLE to SALTABLE


What is a page in db2?


run jcl for cobol+db2 pgm?.. //jobcard //step001 exec pgm=ikjeft01 //systin dd * DSNSYSTEM(--------) RUN PROGRAM(MYPGMNAME) PLAN(-----), LIB(-------), PARMS(------) /* WHAT WILL U GIVE INSIDE THE BRACKETS... WHAT IS PLAN,PACKAGE,BIND?..PLAN N PACAKGES ARE GENERATED BY ?...


Are view updateable?