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Can a primary key have a blank or null value entered into its cell?

Anonymous

∙ 14y ago

Updated: 8/17/2019

No. A Primary Key is the Unique identifier and cannot be null and cannot be duplicate.

Wiki User

∙ 14y ago

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Related Questions

Does a blank cell has a numerical value of one?

No. A blank cell has a numerical value of zero.

A blank cell has the numeric value of?

A blank cell has a numeric value of zero.

What cell in excel with a numerical value of zero?

Blank Cell

When a number is entered in a cell the cell contains?

A value or data.

How do you leave a cell with a formula blank until data is entered?

You could use an IF function to check if a value has been entered into a cell, and if it has to use the formula or else display nothing. So say you wanted to multiply the value in cell B3 by 10 if there was something in B3 or otherwise show a blank. Then in another cell that you wanted the result you would enter the following formula: =IF(ISBLANK(B3),"",B3*10) So in one part we check if B3 is blank. If it is, we have a pair of double quotes to put nothing into the cell. If it is not blank, we multiply B3 by 10. You could put whatever formula you need there. ISBLANK checks if the cell is blank. You can also use other similar functions, like ISNUMBER to check if there is a number or ISLOGICAL to check if there is a logical value, and some other functions. You can use whatever one of them is appropriate.

What cell in Excel has a numerical value of zero?

A cell with zero in it, a cell that is blank and a cell that has the logical value FALSE in it will all have the numerical value zero.

Contains the numerical value of zero?

blank cell

What does a blank cell in Excel?

A blank cell has nothing in it. It has no text. For numeric purposes it is treated as having the value zero, but it is not counted when using the COUNT function as it does not literally have a value in it.

In excel 2007 using IF function you have the logical test value if true and value if false but you want the cell with the formula to be blank if the cell you are referring to is left blank?

=IF(something,true,"")

Does a blank cell in Excel have a numerical value of negative one?

No. It has a value of zero.

In excel what contains the numerical value of zero?

Blank Cell.

In excel 2007 using IF function I have the logical test value if true and value if false but I want the cell with the formula to be blank if the cell I am referring to is left blank.?

IF(Cell="","","Error Message") =IF(Cell="Yes","True",IF(D4="NO","False",IF(D4=" "," "," ")))

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