Answer Posted / maveric
1. EXEC SQL DECLARE TABLE statement which gives the layout of the table/view in terms of DB2 datatypes.
2. A host language copy book that gives the host variable definitions for the column names.
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
Explain in brief how does db2 determine what lock-size to use?
what is the responsibility of the construction superintendent
What are catalog tables in db2?
Which isolation level provides maximum concurrency?
What is rct?
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 db2 restart?
Why do we need reorg in db2?
What is the syntax for FETCH in DB2 ?
Define data page.
What is database manager in db2?
What is host variable in db2 cobol?
What is the usage of open cursor command?
Explain package in db2 and its advantages?
What is collection in db2 bind?
