Data Small set of information becomes data, this set of information helps make decision. Data is always some useful information. Database Place where you store the data. Database represents some aspect of the real world called "miniworld". A database is designed, built and populated with data for a specific purpose. It has intended group of users and some preconceived applications in which these users are interested. In other words, a database has some source from which data is derived, some degree of interaction with events in the real world and an audience that is actively interested in the contents of the database. Database can also be defined as collection of one or more tables. Ex: Mobile, human brain etc DBMS (Database Management System ) Is a program that stores retrieves and modifies data in the database on request. Study of different techniques of design, development and maintenance of the database Types of DBMS These types are based upon their m
Mithun Ashok's Experience, Summary, Trainings and Knowledge Sharing on Oracle Database, Oracle Applications, Fusion Middleware, SQL, PL/SQL and Database Testing
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In this query,
select e.empno,e.ename,d.loc from emp e join dept d ON(e.deptno=d.deptno);
Here wat is the use of 'ON' clause, sir???
Mona
Q1.List the employees whose 10% of salary is equal to year of joining.
Q2.List the Mgrs who r senior to King & who are junior to Smith.
On Caluse is used to,
1. To specify arbitrary conditions or specify columns to join.
2. The join condition is separated from other search conditions.
3. The ON clause makes code easy to understand.
Regards,
Mithun
1. select ename, sal, trunc(10*sal/100), hiredate,to_char(hiredate,'YY') from emp where trunc(10*sal/100) = to_char(hiredate,'YY');
2. select ename, hiredate from emp where hiredate > (select hiredate from emp where ename='KING')
and hiredate < (select hiredate from emp where ename='SMITH');
This will not return any rows as there are no employees in this category, if you say any employee junior to KING and senior to SMITH then you will see some rows. Query for this is as below,
select ename, hiredate from emp where hiredate < (select hiredate from emp where ename='KING')
and hiredate > (select hiredate from emp where ename='SMITH');
Regards,
Mithun
Thank u so much sir, i easily understood those queries but m stil confused wid this 'ON' clause.
So can u plz help me out sir.
Mona
Can I follow the same procedure to install 11g in Windows 7, as the video shown for 10g installation?Is there any other method to uninstall 11g?
ON in Join is ANSI syntax, using this syntax you can do both equijoin as well as non equijoin's.
Here you will join 2 tables like,
select * from emp e join dept d
on (here you will mention the condition using which the tables are joined like e.deptno = d.deptno).
Hope this helps.
Regards,
Mithun
You can follow the same process to install 11g it is similar to 10g install.
To uninstall, refer to my videos on uninstalling oracle database.
Regards,
Mithun
This is Akash Kumar(Scientist) Sir Can you send
me the Questions Generally asked in interviews (Along with Questions You
asked in the class about basic select,functions,joins,
subquery etc..)
akash22121988@gmail.com
pls
Select* from emp where rownum =10;
Its show error
But when we gve the statment like
Select * from emp where rownum <=3;
Then it gve some result... why sir
actually I got job on business intelligence. In this they are teaching like dbms, etl, datawarehouse, reporting, business intelligence and congous tool..is it good to work on this..did i have good future in this.
waiting for your reply
thank you