What is the difference between jpql and sql?

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What are the operators in sql?

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What is a primary key called that is made up of more than one field?

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what are the types of subquery? : Sql dba

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How do I run a sql query?

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What is left inner join in sql?

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How to call DDL statements from pl/sql?

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What is the difference between inner join and natural join?

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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 are the various levels of constraints?

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Can we write create command in the plsql block?if possible how?

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what is the maximum length of a table name, database name, and fieldname in mysql? : Sql dba

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