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Question
please explain database architecture..
 Question Submitted By :: SQL-PLSQL
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
hi,
basic oracle architecture is devided in 3 stages
1. storage structure
1. physical storage
a. data file
b. control file etc..
2.logical storage
a. tablespace
b. extents etc..
2. memory structure
a. SGA
b. PGA
2. process structure
1. mandatory process
a. SMON
b. PMON etc
2. optional process

and much more
 
Is This Answer Correct ?    7 Yes 0 No
Rahul Khanke
 

 
 
 
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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. Sonata 2
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