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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 8739Post New Saman Bank Interview Questions
How much usable space is available, when a Linux system is configured with a RAID 5 array that consists of six 20 GB hard disk drives?
hi .. i have done my b.e in under electronics and communication engineering and now i have opted for computer engineering which has most of communication related subjects. still what should i answer, if i am been asked "why didnt yu opt for electrical engineering"
What are stand-alone procedures?
HI, I am Darshan S D completed BE in Mechanical & also completed my MBA in Finance & Marketing.Presently i am working in Geodis Global Solutions which gives support to the IBM, as a logistics coordinator. i have a plan to do SAP but confused which Specilisation to do ie whether in Finance or Material management. Also scared whether it is right for me to do that, is that will help me in getting good job. what is the future opportunity and present job position in the market.... pld kindly help me to know...
where do you see yourself ten years from now?
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