Unable to retrive data from two tables using multiple joins

Question

Hi,
Table:   EMP mgr 
eid              name
eid mgrid
1
A 1
null
2
B 2
3
3
C 3
3
i need to get result as:
eid ename mgrname
thanks
AVS

Answer 1

Sai,
It would be very helpful if you could mention your table structures a bit more clearly. Would allow for effective replies from fellow users as well. :) 
However, assuming that your structure would be as follows presenting the query as below:
DECLARE @Emp TABLE(Eid Int, ename Varchar(50))
DECLARE @Emp_Mgr TABLE(Eid int, mgrid int null )
INSERT INTO @Emp select 1,'Ram'
INSERT INTO @Emp select 2,'Shyam'
INSERT INTO @Emp_Mgr select 1,NULL
INSERT INTO @Emp_Mgr select 2,1
SELECT * FROM @Emp
SELECT * FROM @Emp_Mgr
Query to print results as EID, ENAME, MGRNAME
SELECT em.eid,e1.ename as ENAME,e2.ename as MGRNAME
FROM @Emp_Mgr em
JOIN @Emp e1 ON em.eid=e1.eid
JOIN @Emp e2 ON em.mgrid=e2.eid
However, as you see this approach of maintaining two tables for preserving the employee-manager data is redundant and makes the queries unnecessarily complex. So, you could opt for the widely used single table format as mentioned by Praveen as well. Check
if this helps you..
Recommended Structure
*Avoidance of redundant storage of data
*Lesser Joins in queries
DECLARE @Emp TABLE(Eid Int , Ename Varchar(50) , mgrid int null )
INSERT INTO @Emp(Eid , ename , mgrid) values(1 , 'Ram' , null) , (2 , 'Shyam' , 1)
SELECT * FROM @Emp
Query to print results as EID, ENAME, MGRNAME
SELECT e.Eid , e.Ename , m.Ename as MgrName
FROM @Emp e
JOIN @Emp m On a.mgrid = b.eid
Thanks,
Jay
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