If a table has a column "dept" (declared to have nulls) and
there are 10 rows in the table of which 3 have a null value
in the dept column, what will select count(*) and select
count(distinct dept) return?
Answer Posted / keshireddy
Hmm Virender is correct
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
How does a cursor work?
What is check constraint. Explain with example.
What is a storage group (stogroup)?
What is ibm db2 used for?
What is cascading rollback?
What is a db2 tablespace?
What are the prerogatives?
Can one database have multiple instances?
How do we specify index to include or not during bind process.
What is commit in db2?
What is a trigger in the db2 database?
How can the firstname and the lastname from the emp table be concatenated to generate complete names?
What do you mean by cursor?
What is the role of union all and union
Explain the function of data manager.