473,695 Members | 1,731 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

slecting multiple distinct columns..

Hi all...
I have a table in which some columns has distinct values and some has
duplicates..i wan to select all the columns with distinct values....no
problem if rows has null value in it....i tried a lot wit distinct and
group by but nothing got worked out...
Waitin for your reply.....
Thanking you...

Mar 7 '06 #1
2 8657
Try the Having clause
For example, this will bring back records that have duplicate records
for Col1, Col2 and Col3.

If you want only records that have a single record, you can change ">
1" to "= 1".

Col1, Col2, Col3, COUNT(*) as NumberDups
FROM SomeTable
GROUP BY Col1, Col2, Col3
Of course, you could post your table definitions with Create statements
and insert statements so people could have data to work with to help

vv*****@gmail.c om wrote:
Hi all...
I have a table in which some columns has distinct values and some has
duplicates..i wan to select all the columns with distinct values....no
problem if rows has null value in it....i tried a lot wit distinct and
group by but nothing got worked out...
Waitin for your reply.....
Thanking you...

Mar 7 '06 #2
(vv*****@gmail. com) writes:
I have a table in which some columns has distinct values and some has
duplicates..i wan to select all the columns with distinct values....no
problem if rows has null value in it....i tried a lot wit distinct and
group by but nothing got worked out...
Waitin for your reply.....

I will have to admit that I have a poor understanding of what you are
asking for. But there is a standard recommendation for this sort of
questions, and that is that you post:

o CREATE TABLE statements for your table(s).
o INSERT statements with sample data.
o The desired output, given the sample data.
o A short description of the underlying business problem.
Erland Sommarskog, SQL Server MVP, es****@sommarsk og.se

Books Online for SQL Server 2005 at
Books Online for SQL Server 2000 at
Mar 7 '06 #3

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

by: Dean | last post by:
I want to build query to return how many rows are in this query: select distinct c1, c2 from t1 But SQL won't accept this syntax: select count (distinct c1, c2) from t1 Does someone know how to count multiple distinct columns? Thanks.
by: Jason L James | last post by:
Hi all, does anyone know if I can create a dataview from multiple datatables. My dataset is constructed from four separate tables and then the relationships are added that link the tables together. To make data entry easier I would like to combine selected columns from the four tables onto a single dataview that could be used as the datasource for a datagrid control. The distinct updates, insert ans delete
by: Peter Proost | last post by:
Hi group, has anyone got any suggestions fot the best way to handle this problem, I've got 3 tables for example table A, B, and C table A looks like name, value table B looks like name, value table C looks like variablename, value, value an example would be
by: zaphod | last post by:
I need to select unique combinations of 4 columns from one table and insert them into a new table but I can't think of any way of finding unique combinations of more than 1 column since SELECT DISTINCT only works on single columns. Any ideas? zaphod
by: p175 | last post by:
Hi people, I have a stored procedure that creates many Global temporary session tables. Into each of these tables go the results of various processing using relational division all keyed and based on a common ID from an ID session table. So we can have various session tables with differing results but if they contain records, they are all keyed to the common ID. My problem now however is how do I report the overall findings of the
by: MP | last post by:
Hi trying to begin to learn database using vb6, ado/adox, mdb format, sql (not using access...just mdb format via ado) i need to group the values of multiple fields - get their possible variations(combination of fields), - then act on each group in some way ...eg ProcessRs (oRs as RecordSet)... the following query will get me the distinct groups
by: Michel Esber | last post by:
Hello, Db2 Linux LUW FP 15. Consider table A (ID varchar, EXECUTION_DATE date). a) I want to first retrieve all IDs that have not executed during the last 90 days: select distinct ID from table_B where NOT EXISTS
by: ukchat | last post by:
I.m creating a dynamic query to pull out workbooks from my database the table structure is below. Table: curricworkbooks Columns: ID, curric, assessment, topic, workbook, filename Example data 1 N1/E1.1 Numeracy E1 Count 1 workbooks/Num Entry 1/Unit 1/04 N1E1.1-3 Worksheets Num.pdf 10 MSS1/E1.6 Numeracy E1 Capacity 13 workbooks/Num Entry 1/Unit 13/04 MSS1E1.6 Worksheets Num.pdf
by: omerbutt | last post by:
hi there i have to select 7 columns from table1, 1 column from table2, and 1 column from tables3 and show the result but i am not getting it right the main thing that i am trying to achieve is that i am making a notice board in a community and i have to show the notices that are posted for the specific user by comparing the fields like GENDER AGE AND CITY that are given in the notice i have done it quiet right to some extent means if i have to...
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.