Interested to Buy Any Domain ? << Click Here >> for more details...
How do you check for a null value in a db2 column?
- 2 Answers
- 11792 Views
- I also Faced
- E-Mail Answers
Answer Posted / guest
You use a null indicator on the colunm and if the null
indicator = -1 then the column has a null value.
| Is This Answer Correct ? | 32 Yes | 0 No |
Post New Answer View All Answers
Define db2 and its databases?
What are concurrency issues?
What does a deadlock mean in DB2?
What is the difference between cursor and select statement?
What is a buffer in memory?
B37 abend during spufi?
What are the various data types available in db2?
What is role in db2?
How do I create a view in db2?
Why do we need reorg in db2?
What is the use of db2 optimizer?
What is the picture clause of null indicator variable?
How do I optimize a query in db2?
Define sqlca.
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.
