in db2, already 10 columns arie der, and i want to insert 11th column. what parameters u wil consider for insertion and how will u insert
Answer Posted / azharuddinsyed
ALTER TABLENAME
ADD COLUMN <COLUMN NAME> <DATATYPE>(<SIZE>)
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
DB2 can implement a join in three ways using a merge join, a nested join or a hybrid join. Explain the differences?
How many types of page locks can be held in db2?
What is nvl in db2?
How would you find out the total number of rows in a db2 table?
Give a brief description of db2 isolation levels?
Which components manage deadlocks in db2?
What is a bind card?
Explain dclgen.
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.
How does coalesce work?
When the like statement is used?
What is the use of db2 optimizer?
How to get the ddl of a table in db2?
Mention the location where the output received from explain statement is stored.
Hi, i would like to start a new carrier in DB2 DBA.Which and what all step should i have to take..?