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Sql Server Distinct

Hi,

Can you please explain how distinct will work  if we have a query like this..

select distinct ColA,ColB,ColC from EmpTable.

0
N_Sri
Asked:
N_Sri
2 Solutions
 
SharathData EngineerCommented:
It will give you a distinct record for the combination of ColA,ColB and ColC. So if you have multiple records for this combination, you will get only one record.

For example, assume you have records like this
ColA      ColB      ColC
A      B      C
A      B      C
A      B      D
B      C      D
S      C      D

with DISTINCT, you get one combination for these three columns.
ColA      ColB      ColC
A      B      C
A      B      D
B      C      D
S      C      D

Does that make sense?
0
 
Ephraim WangoyaCommented:

It means for each row selected, the combination of the fields ColA, ColB and ColC will always be unique on each row

eg
0,0,1
0,1,0
0,1,1
1,0,0
1,0,1
1,1,0
1,1,1
0
 
N_SriAuthor Commented:
thankyou
0

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