by: Agoston Bejo |
last post by:
I want to enforce such a constraint on a column that would ensure that the
values be all unique, but this wouldn't apply to NULL values. (I.e. there
may be more than one NULL value in the column.)...
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by: A.M. de Jong |
last post by:
Reading a lot about Nulls right now I still can't find a Technical reason to
use it or not.
For what I've understand is this:
In an Ingres database a Null column has a standard extra storage...
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by: Bodza Bodza |
last post by:
I'm having an argument with an incumbent self-taught programmer that
it is OK to use null foreign keys in database design.
My take is the whole point of a foreign key is that it's not supposed...
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by: iStrain |
last post by:
Hiya. I'm _sure_ this is an FAQ, but Googling hasn't produced the
answer in a way I can make sense out of. I know I should get this, but
so far no way...
I'm creating tables and doing queries in...
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by: Robert Stearns |
last post by:
Either I missed something, or ALTER TABLE does not have this
capability. Is there any way of doing it except
DROPping all constraints which mention this table,
EXPORTing the data,
DROPping the...
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by: Douglas Buchanan |
last post by:
I cannot access certain column values of a list box using code.
I have a list box 'lstPrv' populated by the query below.
SELECT tblPrv.fkPrvID, lkpCat.CatNm, lkpSrv.SrvNm, lkpCat.pkCatID,...
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by: google |
last post by:
This is something I've done plenty of times in '97, but I can't seem to
get it to work correctly in Access 2003. Say, for example, I have a
form with an unbound combobox, the data source is a...
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by: axelsino |
last post by:
I know this has been asked before and yes, I have read the section in
the documentation about it.
But, my question is: If I have setup mysql with strict_trans_tables,
will MySQL allow "null"...
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by: binder |
last post by:
I am designing a new table with a few columns that may or may not have
a value on each row that is inserted.
What issues determine whether to allow a NULL value to be inserted for
that column or...
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by: BobLewiston |
last post by:
Some of you may have seen my earlier thread “PasswordHash NULL problem”. I’ve started a new thread because investigation has shown that the problem is actually quite different than I previously...
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by: taylorcarr |
last post by:
A Canon printer is a smart device known for being advanced, efficient, and reliable. It is designed for home, office, and hybrid workspace use and can also be used for a variety of purposes. However,...
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by: Charles Arthur |
last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
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by: aa123db |
last post by:
Variable and constants
Use var or let for variables and const fror constants.
Var foo ='bar';
Let foo ='bar';const baz ='bar';
Functions
function $name$ ($parameters$) {
}
...
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by: ryjfgjl |
last post by:
In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...
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by: emmanuelkatto |
last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud.
Please let me know.
Thanks!
Emmanuel
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by: Sonnysonu |
last post by:
This is the data of csv file
1 2 3
1 2 3
1 2 3
1 2 3
2 3
2 3
3
the lengths should be different i have to store the data by column-wise with in the specific length.
suppose the i have to...
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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,...
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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...
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers,...
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