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 8940Post New Saman Bank Interview Questions
A student multiplied a number by 3 instead of 5 . 5 3 What is the percentage error in the calculation?
How we can remove an attribute of an html tag in jquery?
What is protocol in networking?
Explain how is linked list implemented?
Is html5 a programming language?
What are the main characteristics of the age pyramids of developed countries?
How do I change my passwords (database, LDAP, and so on) without causing an outage?
Tell me what kind of machines or equipment have you worked with? : insurance sales
Can enum be null?
How to insert rows and columns in word?
Which of the metals react violently with water to produce hydrogen gas?
Is it possible to use Windows Forms in a WPF application?
Is this statement true or false? All databases must be in third normal form?
What is the difference between syntax error and runtime error?
What are the modifier available in Kotlin ?