Interested to Buy Any Domain ? << Click Here >> for more details...
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 Answers
- 6314 Views
- Verizon, I also Faced
- E-Mail Answers
Answer Posted / mani
While declaring the cursor include the null indicator for
the variables which you are retrieiving from the table.
Example.
Select empno,deptname from emp into
:ws-empno:ws-empno-ind,:ws-deptname:ws-deptname-ind
where empname='....'
Based on the values in ws-empno-ind,ws-deptname-ind we can
know whether the vaules being retrived are null are not.
If null indicator variable has a value -1 then the retrieved
value is null.
If you do no specify null indicator variable and the value
retreived is null then you would get -305 as the sqlcode.
The null indicator is declared as
05 ws-empno-ind s9(4) comp
| Is This Answer Correct ? | 22 Yes | 0 No |
Post New Answer View All Answers
SET is the ANSI standard for variable assignment, SELECT is not. SET can only assign one variable at a time, SELECT can make multiple assignments at once. If assigning from a query, SET can only assign a scalar value. If the query returns multiple values/rows then SET will raise an error. SELECT will assign one of the values to the variable and hide the fact that multiple values were returned (so you'd likely never know why something was going wrong elsewhere - have fun troubleshooting that one) When assigning from a query if there is no value returned then SET will assign NULL, where SELECT will not make the assignment at all (so the variable will not be changed from it's previous value) As far as speed differences - there are no direct differences between SET and SELECT. However SELECT's ability to make multiple assignments in one shot does give it a slight speed advantage over SET.
What is scrollable cursor in db2?
What is the maximum length of sqlca?
Mention the definition of cobol in varchar field.
What is explain in db2?
How can you validate Sql errors during cursor operation in db2 pgms and where do you code?
What is declare cursor?
What is a db2 tablespace?
what is db2 restart?
Explain correlated sub-queries.
Mention the various locks that are available in db2.
What is node in db2?
What is db2 connect?
Define data page.
What are the rules for db2 programming?
