how will u find statistics of a database objects?

2 Answers   iFlex,

---

Why do we use sql constraints? Which constraints we can use while creating database in sql?

0 Answers  

---

Can we use commit or rollback in trigger? If yes, then how. Please explain with a suitable example?

5 Answers   HSBC,

---

How do I remove all records from a table?

0 Answers  

---

Why is sql*loader direct path so fast?

0 Answers  

---

---

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  

---

is it possible to pass an object or table to a procedure as an argument?

0 Answers  

---

HOW CAN I FIND MAX SAL ,ENAME FROM EMP TABLE.

16 Answers  

---

What is java sql driver?

0 Answers  

---

What is number function in sql?

0 Answers  

---

How does left join work in sql?

0 Answers  

---

how to create a new table in mysql? : Sql dba

0 Answers  

---