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Runtime error '-2147217887(80040e21)

Posted on 2003-11-26
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Last Modified: 2013-12-25
Runtime error '-2147217887(80040e21)': - The changes you requested tot the table were not successful because they would create duplicate values in the index,primary key  or relationship in visual basic
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Question by:chembukar
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by:MYLim
ID: 9830292
THIS IS VIOLATION OF PRIMARY KEY.
PRIMARY KEY MEANS : record should be appear one time.(unique).
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MYLim earned 125 total points
ID: 9830313
Ex:Table Employee have 2 field (Employeecode,EmployeeName)
every employee should have his own employeecode.
-Jason = EMP1000
-Jacky = EMP1001
-JACK = EMP1002

primary key will define when design database table.
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LVL 8

Expert Comment

by:MYLim
ID: 9830321
Ex:Table Employee have 2 field (Employeecode,EmployeeName)
every employee should have his own employeecode.
-Jason = EMP1000
-Jacky = EMP1001
-JACK = EMP1002

database designer will define/create primary key to prevent duplicate data exist in table employee.primary key will define when create table.
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LVL 8

Expert Comment

by:MYLim
ID: 9830331
Cut from MSDN library:
primary key
A column or combination of columns that uniquely identifies a row in a table. It cannot allow null values and must always have a unique index. A primary key is used to relate a table to foreign keys in other tables.
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by:MYLim
ID: 9841044
any more question ?
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by:ayufans
ID: 10512151
No comment has been added lately, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area that this question is:

- answered by MYLim

Please leave any comments here within the next four days.

PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER !

ayufans
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