by: Vinodh Kumar P |
last post by:
I understand the number of foreign keys allowed is restricted by the DBMS I
use.
In a general relational schema design perspective how many foreign keys a
table shall have?
If I have large number...
|
by: pb648174 |
last post by:
I have a table called BidItem which has another table called
BidAddendum related to it by foreign key. I have another table called
BidFolder which is related to both BidItem and BidAddendum, based...
|
by: Thomas LeBlanc |
last post by:
I am able to enter a null in a foreign key field in one table(table2)
without the foreign key relationship (table1.t1_id) validating the value.
Why is this?
Below are 2 table's scripts:
...
|
by: Brendan Jurd |
last post by:
Hi all,
I read on the manual page for Inheritance that:
"A limitation of the inheritance feature is that indexes (including
unique constraints) and foreign key constraints only apply to single...
|
by: D. Dante Lorenso |
last post by:
I'd like to run a clean up command on my tables to
eliminate rows that I'm no longer using in the database.
I want to do something like this:
DELETE FROM tablename
WHERE...
|
by: Thomas T. Thai |
last post by:
I'm looking for a better way to make use of foreign keys. Here is a
sample setup:
-- TESTING Foreign Keys
create table mod (
mod_id int not null primary key,
name varchar(32) not null...
|
by: sonal |
last post by:
Hi all,
I hv started with python just recently... and have been assigned to
make an utility which would be used for data validations...
In short we take up various comma separated data files
for...
|
by: Chris |
last post by:
I have a database column that stores a comma delimited list of foreign
keys. Would someone show me how to do a join using the values from a
list stored within a record?
For example, a record in ...
|
by: Giulio Simeone |
last post by:
Hello,
when I try to insert a new record in a certain table I get the error
Cannot add or update a child row: a foreign key constraint fails
The table has three foreign keys and six other...
|
by: Fritz Franz |
last post by:
Hello!
I have a table A with fields id,startdate and other fields. id and startdate
are in the primary key.
In the table B I want to introduce a Foreign key to field id of table A.
Is this...
|
by: Charles Arthur |
last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
|
by: BarryA |
last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
|
by: nemocccc |
last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
|
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...
|
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,...
|
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...
|
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,...
|
by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...
|
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...
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