Can we use delete in merge statement?

0 Answers  

---

Can you load data into multiple tables at once? : aql loader

0 Answers  

---

Why do we need cursors in pl sql?

0 Answers  

---

How can I change database name in sql?

0 Answers  

---

What is the difference between sql and isql*plus?

0 Answers  

---

---

how u can find the n row from a table?

19 Answers   Tech Mahindra,

---

How do you rename a table in sql?

0 Answers  

---

How do I partition in sql?

0 Answers  

---

how to fetch alternate records from a table? : Sql dba

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  

---

What is structural independence and why is it important?

0 Answers  

---

What is TABLE SPACE?

4 Answers   ABB, TCS,

---