Easy way to convert tableau "IF - ELSEIF" statements to Netezza "CASE" statements.

1 Answers   CTS,

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What is the sql query to display the current date?

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how to check the 3rd max salary from an employee table? One of the queries used is as follows: select sal from emp a where 3=(select count(distinct(sal)) from emp b where a.sal<=b.sal). Here in the sub query "select count(distinct(sal)) from emp b where a.sal<=b.sal" or "select count(distinct(sal)) from emp b where a.sal=b.sal" should reveal the same number of rows is in't it? Can any one here please explain me how is this query working perfectly. However, there is another query to get the 3rd highest of salaries of employees that logic I can understand. Pls find the query below. "select min(salary) from emp where salary in(select distinct top 3 salary from emp order by salary desc)" Please explain me how "select sal from emp a where 3=(select count(distinct(sal)) from emp b where a.sal<=b.sal)" works source:http://www.allinterview.com/showanswers/33264.html. Thanks in advance Regards, Karthik.

4 Answers  

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What is bind reference and how can it be created?

0 Answers  

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what is Hash join?how it is different from inner join?what is the sign used for inner join?(eg: like the (+) sign used for outer join)?

3 Answers   TCS,

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8 Answers   Wipro,

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How do you use collections in procedure to return the resultset?

0 Answers  

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how to see the oracle 9i/10g table in pc? or In my pc where the table is saved and how to see?

1 Answers  

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What does (+) mean in sql joins?

0 Answers  

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Is there any problem if we use commit repeatedly after each dml statement in a plsq procedure ? (eg. there are 10 update stmt and using 10 commit stmt after each update stmt)

1 Answers  

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What is optimistic concurrency control? : Transact sql

0 Answers  

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what is query cache in mysql? : Sql dba

0 Answers  

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