How to avoid duplicate value

Question

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hi!
I use this Query to fetch location:

SQL

SELECT top 6 L_ID, L_Name, 1 as OBCol FROM Locations where L_Name like 'ban%' UNION  SELECT Distinct
top 4 L_ID, L_Name, 2 as OBCol FROM Locations where L_Name like '%ban%'  order by OBCol

And my result shown as:

C#

ID                 Name             OBCol
3	           Bandarban	          1
118	           Bangladesh	          1
3	            Bandarban	          2
18       	    Gaibandha	          2
102	            Albania	              2
118	            Bangladesh	          2

here i don't want to show duplicate value like Bandarban or Bandarban.how can i do it plz help me

What I have tried:

As i know that Union remove duplicay and i already use union but it can't do that.if I remove group by then its working but i need to use group by.

Posted 3-May-16 22:59pm

Member 9361273

Updated 3-May-16 23:17pm

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CHill60 4-May-16 5:07am

You haven't got a group by in your query!
~~Share some of your data from Locations and~~ explain what you want your query to show - that query you have so far looks far too complicated - i.e. what are the rules for using ban% and %ban%

Member 9361273 4-May-16 5:20am

ok here i want to fetch those data which have 'ban' pattern and first i want to show those words which start with 'ban' pattern and then want to show those word which have 'pattern' in middle or last

CHill60 4-May-16 6:05am

Then I think the solution I've posted will work for you - particularly the 2nd option I gave.

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CHill60 · Accepted Answer · 2016-05-03T23:17:00

Probably the simplest way to sort your problem as currently stated is to change the where clause on the 2nd query in the UNION e.g.

SQL

SELECT top 6 L_ID, L_Name, 1 as OBCol 
FROM Locations where L_Name like 'ban%'
UNION  
SELECT top 4 L_ID, L_Name, 2 as OBCol 
FROM Locations where L_Name like '%ban%'  and L_Name NOT LIKE 'ban%'
order by OBCol

Alternatively you could drop the UNION all together and work out the value OBCol using CASE

SQL

SELECT L_ID, L_Name, 
CASE WHEN L_Name like 'ban%' THEN 1 ELSE 2 END as OBCol 
FROM Locations where L_Name like '%ban%'
order by OBCol