What is the main difference between a UNION statement and a UNION ALL statement? 1. A UNION statement eliminates duplicate rows; a UNION ALL statement includes duplicate rows. 2. A UNION statement can be used to combine any number of queries; a UNION ALL statement can be used to combine a maximum of two queries. 3. A UNION statement can only combine queries that have parallel fields in the SELECT list; a UNION ALL statement can combine queries with differing SELECT list structures. 4. A UNION statement cannot be used with aggregate functions; a UNION ALL statement can be used with aggregate functions. 5. There is no difference between the two statements; they are interchangeable.
2 8937Post New Saman Bank Interview Questions
What are all the microsoft programs?
Is primary key an index?
Mention what are the capabilities of selenium webdriver or selenium 2.0?
What does enum stand for?
Write two ways in which computer applications differ from network applications ?
Is boiler a closed system?
What is the lambda?
How do you count numbers in php?
What is the diffrence between a local-tx-datasource and a xa-datasource? Can you use transactions in both?
How do you kill pid?
What is json file type?
what is the relevance of computer science to business management
What is lts in node js?
Discuss various surface finishing processes?
Which devices are supported by microsoft to be used with oma?