how to do backup entire database? : Transact sql

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What is a relationship and what are they?

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What is dml and ddl?

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Is there a pl/sql pragma similar to deterministic, but for the scope of one single sql select?

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What are different types of triggers?

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Is sqlite good enough for production?

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Hi, Can anybody please explain me the flow of the below query. I am not able to understand how this query works. This query is for finding the Nth highest salary.. SELECT DISTINCT (a.sal) FROM EMP A WHERE &N = (SELECT COUNT (DISTINCT (b.sal)) FROM EMP B WHERE a.sal<=b.sal); If N = 2 then second highest salary will be the o/p. If N = 3 then third highest salary will be the o/p. and so on.. Thanks, Nitin

5 Answers   Deloitte, Ness Technologies,

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what is an index? : Sql dba

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what is External tables? explain with examples

2 Answers   TCS,

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Write a program that shows the usage of while loop to calculate the average of user entered numbers and entry of more numbers are stopped by entering number 0?

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what is organisational index?

1 Answers  

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real time applications of nullif?

3 Answers  

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