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 19249Can 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 6125Is 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 23046Hi 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 2859Suppose 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 4874For 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 4773i 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 5254I 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 6561
Is db2 a database?
What is dclgen in db2?
What is db2 bind?
What r the comman abends in db2, jcl and cobol???????
How does coalesce work?
What does db2 plan contain?
Can we insert update delete in view?
If I have a view which is a join of two or more tables, can this view be updateable?
What are union and union all?
How to execute stored procedures?
How can the duplicate values be eliminated from db2 select?
What is a trigger in the db2 database?
what is the role of the cursor in db2?
How do I copy a table in db2?
What is a db2 collection?
