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Check Dupplicate Entries In Table


Helo everybody,

How can i find a dupplicate entry in one table?




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Check For Duplicate Entries In One Field
Obviously, I'm a complete n00b at SQL.

I have a table in Access 2003 with about 6,000 records and there are about 20 records that have duplicate data in the first field (CompID).

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I could export to Excel and fix the problem that way, but in the interest of learning SQL I want to figure out how to do it properly.

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@Userid uniqueidentifier OUTPUT,@DisplayName varchar(200)
 
AS
 
SELECT *
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Prevent Duplicate Entries In A Table
I have an ASP.Net Web appplication with a Back-End SQL DB. There are 3 Tables; Users, Groups, and GroupMember.

The GroupMember table is used to link Users to Groups and consists of just two fields; userID and GroupID.

Here is a sample of some data:

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Hi,

I have a table with no primary key and i just want to see all the duplicate entries on the basis of two columns. Can anyone suggest me how should i go about it.

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Writting Trigger Or Procedure To Delete Duplicate Entries In A Table?
I am using Sql Server 2000.
I have a customer table with fields - CustId, Name, Address, City, StdCode, Phone.
I used to insert entries in this table from an excel file.
One excel file will contain thousands of customer.
In this table combination of StdCode and Phone should not be repeated.
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Will it take this much time to retrieve data.?.
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can sql server do this ?
table 1 that check  table 2 and adding  missing dates
this my employee table

table 1
table Employee on work
------------------------
empid basedate shift
----------------------------
12345678 01/04/2007 1
12345678 02/04/2007 1
12345678 03/04/2007 1
12345678 04/04/2007 1
12345678 05/04/2007 1
12345678 06/04/2007 1
12345678 07/04/2007 1
12345678 08/04/2007 1
12345678 09/04/2007 1
12345678 10/04/2007 1

98765432 20/04/2007 1
98765432 21/04/2007 3
98765432 22/04/2007 3
98765432 23/04/2007 5
98765432 25/04/2007 4
98765432 26/04/2007 4
98765432 27/04/2007 4
98765432 28/04/2007 4
98765432 30/04/2007 4
-----------------------------------------------------------------------------------
and i need to see the missing dates lkie this

in table 2
------------------------------------------------------
table 2 (adding  missing dates with zero 0)
table Employee_all_month
------------------------
empid basedate shift
----------------------------
12345678 01/04/2007 1
12345678 02/04/2007 1
12345678 03/04/2007 1
12345678 04/04/2007 1
12345678 05/04/2007 1
12345678 06/04/2007 1
12345678 07/04/2007 1
12345678 08/04/2007 1
12345678 09/04/2007 1
12345678 10/04/2007 1
12345678 11/04/2007 0
12345678 12/04/2007 0
12345678 13/04/2007 0
12345678 14/04/2007 0
12345678 15/04/2007 0
12345678 16/04/2007 0
12345678 17/04/2007 0
12345678 18/04/2007 0
12345678 19/04/2007 0
12345678 20/04/2007 0
.................................and adding  missing dates with zero 0 until the end of the month
.................................
12345678 31/04/2007 0


98765432 01/04/2007 0
98765432 02/04/2007 0
98765432 03/04/2007 0
98765432 04/04/2007 0
98765432 05/04/2007 0
98765432 06/04/2007 0
98765432 07/04/2007 0
98765432 08/04/2007 0
98765432 09/04/2007 0
..............................and adding  missing dates with zero 0  only whre no dates in this month
.......................

98765432 20/04/2007 1
98765432 21/04/2007 3
98765432 22/04/2007 3
98765432 23/04/2007 5
98765432 25/04/2007 4
98765432 26/04/2007 4
98765432 27/04/2007 4
98765432 28/04/2007 4
98765432 30/04/2007 4
 
 
TNX
 

 

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&"Save&" DELETED Entries To New Table
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I would like to know if its possible to "Save" records when they get deleted.
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All this should go to a seperate database or seperate table, it doesnt really matter.
My delete query:DELETE FROM [tblUsers] WHERE [UserID] = @UserID

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Check Id Exists In Sql Table?
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Hi...

Is there any way to check previous row in SQL Query?

I have a table with these column :
Name1
Name2
Audit_Time (datetime)
Changes

I want to delete record from database in which the Audit_time is <'01/05/2004'.
However before deletion, I want to check, if the Changes value is 'OLD' And the previous value is 'NEW', I will check the Audit_time of the NEW instead of OLD.


Table :
Row Name1 Name2 Audit_Time(mm/dd/yyyy) Changes
1 ABCD EFGH '01/01/2004' ADD
2 ABCD EFGHIJ '01/04/2004' NEW
3 ABCD EFGH '01/04/2004' OLD
4 Klarinda Rahmat '02/08/2004' NEW
5 Klarinda Rahmat '01/04/2004' OLD


In this case, I want to delete row 1,2,3 Where the audit_time are < '01/05/2004'.
Row 5 the audit_time also < '01/05/2004', however the changes='OLD' and the previous value changes='NEW', so I will check the Audit_Time of row 4 which is not < '01/05/2004'.
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Is there any way to check previous row or the row before a specific row in SQL.
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Sometimes Oracle transfer bombs out and the table is empty but our process runs anyway. It screws everything up.

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I have a requirement like this,

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how do i write a SQL for this ?
 

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USE [ScheduleDB]

GO

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Hi,

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EXEC sp_addlinkedserver
@server = N'MYVFPSERVER', -- Your linked server name here
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Hi,

I can check the existency of the attribute in particular table. But is it possible for me to check whther my table is exist or not in that particular database?

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I apologize if this has been asked, and answered, before. I wasn't able to find relevant posts on the forum. A Google search pointed me to a couple of pages that offered this simple recipe:
 
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> There is already an object named '#temp' in the database.
 
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Hello.



How can I check if a temporary table exists in the current context?



With normal tables I'd do a

    EXISTS ( SELECT name FROM sysobjects

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However, I can't do that with a temporary table. I'd have to go look at the sysobjects table in the tempdb database.



The problem is that for temporary tables, a suffix is added to the name to make it unique for each scope. I can't change the WHERE clause to name LIKE 'myTableName%' because this would return true if a temporary table with the same name exists in a different scope.



Any ideas?



Carlos

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Dear All,

 

I wanted to know how do I know or check that whether a column exists in a table. What function or method should I use to find out that a column has already exists in a table.

 

When I run a T-SQL script which i have written does not work. Here is how I have written:

IF Object_ID('ColumnA') IS NOT NULL
        ALTER TABLE [dbo].[Table1] DROP COLUMN [ColumnA]
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I badly need some help.

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Thanks!

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How To Check For Table Existence Before Dropping It?
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I'd just like to check if a table already exists before dropping it so that I can avoid an error if it doesn't exist. Doing a web search, I've tried along the lines of
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and
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In both of these cases I get the error: "There was an error parsing the query. [ Token line number = 1,Token line offset = 1,Token in error = if ]"

Sooooo... what is the standard way to check for existence of a table before dropping it? Someone help? This seems like it should be simple, but I can't figure it out.

Thanks in advance!
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for my application i'm using oracle database and C#.Net.
table is g_users and columns are:
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HI
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Now i try to check the value at the same time if it is NULL value in the Database then pass EmptyString to the DropDownList Like ("" "" ,(xyz@xyz.com))
how i can do that in the store procedure.
Comments will be appreciated.

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I need SP
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(
@Tablename varchar(30),
@Fieldname varchar(30),
@existance char(1) OUTPUT,
@field_type varchar(30) OUTPUT,
@field_size int OUTPUT,
@field_decimal int OUTPUT
)
as
/* Below check the existance of a @Fieldname in given @Tablename */
/* And set the OUTPUT variables */
 
 
 
Thanks

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