Interested to Buy Any Domain ? << Click Here >> for more details...
explain different types of jions with examples briefly?
- 2 Answers
- 8780 Views
- Accenture, Excellence, Zensar, I also Faced
- E-Mail Answers
Answer Posted / soni
Inner join: This type of join displays matched rows from
tables.
this is based on equality condition ,so also called
equijoin.
exp- select empid,d.deptid,deptname,empname,location,salary
from emp e inner join dept d on e.deptid=d.deptid
Cross join: this is not based on any condition. It results
every row of one table matching with every row of another
table.
exp- select * from emp cross join dept
Self join: This ype of join joins a table to itself.
outer join:
Three types -
a.left outer join: It reults mathed rows from both tables
as well as all unmatched rows from left table.
exp- select empid,d.deptid,deptname,name,location,salary
from emp e left outer join dept d
on e.emp=d.dept
it displays all data from emp table .
right Outer join:It reults mathed rows from both tables as
well as all unmatched rows from right table.
exp- select empid,d.deptid,deptname,name,location,salary
from emp e right outer join dept d
on e.emp=d.dept
it displays all data from dept table .
Full Outer Join: This type of join results all matched
rows from both tables as well as umatched rows from both
tables.
exp.-select empid,d.deptid,deptname,name,location,salary
from emp e full outer join dept d
on emp e=d.dept d
It displays all matched and unmatched rows from both emp
and dept tables.
| Is This Answer Correct ? | 5 Yes | 3 No |
Post New Answer View All Answers
what do you understand by change data capture?
Explain how many normalization forms?
how would you improve etl (extract, transform, load) throughput?
What will be the maximum number of index per table?
Can you tell me some of the common replication dmv's and their use? : sql server replication
How to Improve the performencs of SQL Server 2005 exclude stored Procedure and Indexes?
When would you use it?
What are truncate options available in sql server? : sql server database administration
What is the difference between dbcc indexdefrag and dbcc reindex?
How to write the storeprocedure with in the store procedure? and how can we write the store procedure with in a trigger vice versa? plz post me the exact answer?
Why should you use or avoid select * statements?
How to provide default values to stored procedure parameters?
Explain ms sql server reporting services vs crystal reports?
What are the key configuration files for sql server reporting services ?
What is faster join or union?
