What is sql*loader and what is it used for? : aql loader

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Explain the significance of the & and && operators in pl sql.

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how to Update table Sales_summary with max(sales) data from table sales_dataTable 1. sales_data table Table 2. Sales_summary Region sales Region sales N 500 N 0 N 800 W 0 N 600 W 899 W 458 W 900 I want the Sales_summary After Update like this Region Sales N 800 W 900

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How to run sql commands in sql*plus?

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What is the use of a view in sql?

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What is a file delimiter?

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wtite down triggr not any entry on Sunday

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can use the following like overloading concept in a single package: procedure p1(a varchar), procedure p1(a varchar2), procedure p1(a char)

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How many functions are there in sql?

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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.

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How do I sort a table in sql?

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What information is needed to connect sql*plus an oracle server?

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