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MS SQL dealing with duplicate columns in rows?
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#1
 
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MS SQL dealing with duplicate columns in rows? -
08-21-2007
, 04:04 AM
#2
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Hello, Suppose I have the following table... name employeeId email -------------------------------------------- Tom 12345 t... (AT) localhost (DOT) com Hary 54321 Hary 54321 h... (AT) localhost (DOT) com I only want unique employeeIds return. If I use Distinct it will still return all of the above as the email is different/missing. Is there a way to query in SQL so that only distinct employeeId is returned? no duplicates. I wouuld like to say WHERE no blank fields are present to get the right row to return. Many thanks Yas |
email address or the one with the email address?
#3
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On Aug 21, 10:04 am, Yas <yas... (AT) gmail (DOT) com> wrote: Hello, Suppose I have the following table... name employeeId email -------------------------------------------- Tom 12345 t... (AT) localhost (DOT) com Hary 54321 Hary 54321 h... (AT) localhost (DOT) com I only want unique employeeIds return. If I use Distinct it will still return all of the above as the email is different/missing. Is there a way to query in SQL so that only distinct employeeId is returned? no duplicates. I wouuld like to say WHERE no blank fields are present to get the right row to return. Many thanks Yas Which row for Hary do you want to be returned? The one without an email address or the one with the email address? |
cheers
#4
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On 21 Aug, 11:20, stephen <m0604... (AT) googlemail (DOT) com> wrote: On Aug 21, 10:04 am, Yas <yas... (AT) gmail (DOT) com> wrote: Hello, Suppose I have the following table... name employeeId email -------------------------------------------- Tom 12345 t... (AT) localhost (DOT) com Hary 54321 Hary 54321 h... (AT) localhost (DOT) com I only want unique employeeIds return. If I use Distinct it will still return all of the above as the email is different/missing. Is there a way to query in SQL so that only distinct employeeId is returned? no duplicates. I wouuld like to say WHERE no blank fields are present to get the right row to return. Many thanks Yas Which row for Hary do you want to be returned? The one without an email address or the one with the email address? basically 1 that doesn't have any fields missing.... cheers |
but why would you have this second row "Hary 54321 " in your
table anyway?
would it not be better to create unique index on emplyeeId ?
#5
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On 21 Aug, 11:20, stephen <m0604... (AT) googlemail (DOT) com> wrote: On Aug 21, 10:04 am, Yas <yas... (AT) gmail (DOT) com> wrote: Hello, Suppose I have the following table... name employeeId email -------------------------------------------- Tom 12345 t... (AT) localhost (DOT) com Hary 54321 Hary 54321 h... (AT) localhost (DOT) com I only want unique employeeIds return. If I use Distinct it will still return all of the above as the email is different/missing. Is there a way to query in SQL so that only distinct employeeId is returned? no duplicates. I wouuld like to say WHERE no blank fields are present to get the right row to return. Many thanks Yas Which row for Hary do you want to be returned? The one without an email address or the one with the email address? basically 1 that doesn't have any fields missing.... cheers |
the design before you can expect a reasonable solution in SQL.
--
David Portas, SQL Server MVP
Whenever possible please post enough code to reproduce your problem.
Including CREATE TABLE and INSERT statements usually helps.
State what version of SQL Server you are using and specify the content
of any error messages.
SQL Server Books Online:
http://msdn2.microsoft.com/library/m...S,SQL.90).aspx
--
#6
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Hello, Suppose I have the following table... name employeeId email -------------------------------------------- Tom 12345 t... (AT) localhost (DOT) com Hary 54321 Hary 54321 h... (AT) localhost (DOT) com I only want unique employeeIds return. If I use Distinct it will still return all of the above as the email is different/missing. Is there a way to query in SQL so that only distinct employeeId is returned? no duplicates. I wouuld like to say WHERE no blank fields are present to get the right row to return. Many thanks Yas Which row for Hary do you want to be returned? The one without an email address or the one with the email address? basically 1 that doesn't have any fields missing.... cheers SELECT * from table where name<>"" and employeeId<>0 and email<>""; |
Please, no double quotes for string constants, use single quotes.
Double quotes are reserved for "delimited identifiers" as defined by the
SQL Standard and supported by MS SQL Server.
--
Martijn Tonies
Database Workbench - tool for InterBase, Firebird, MySQL, NexusDB, Oracle &
MS SQL Server
Upscene Productions
http://www.upscene.com
My thoughts:
http://blog.upscene.com/martijn/
Database development questions? Check the forum!
http://www.databasedevelopmentforum.com
#7
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SELECT * from table where name<>"" and employeeId<>0 and email<>""; Just a note: Please, no double quotes for string constants, use single quotes. Double quotes are reserved for "delimited identifiers" as defined by the SQL Standard and supported by MS SQL Server. |
evironment i use....
some of the don't care, some use double quotes, and some use single
quotes...
thanks anyway for this reminder....
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