Answer Posted / s
INSERT INTO TABLE X VALUES('ABC','DEF','')
will allow you to insert a record with no value specified
for the nullable column
| Is This Answer Correct ? | 2 Yes | 3 No |
Post New Answer View All Answers
What is runstats db2?
How do I delete a table in db2?
What is runstats and reorg in db2?
What are types of indexes?
What is a Foreign Key?
For a db2 column that is being defined as decimal (11, 2), discuss the cobol picture clause.
Can we delete records from view?
What are bind parameters in db2?
Why do we bind in db2?
Mention the definition of cobol in varchar field.
What is a db2 schema?
How is the value function used?
What is bind in db2?
How can you classify the locks in db2?
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.
