by: Olivier Crèvecoeur |
last post by:
Hello,
Excuse me for my poor english.
I would kike know if create index on the foreign key it's necessary or if
Oracle, are optimized for using foreign key whithout index.
Best regards
...
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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: Robert Brown |
last post by:
Let's say I have a type hierarchy: (just an example)
the general entity customer:
CREATE TABLE customer(customer_id int, customer_name varchar(250),
customer_type int)
three specific...
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by: Scott Ribe |
last post by:
I've got a problem which I think may be a bug in Postgres, but I wonder if
I'm missing something. Two tables, A & B have foreign key relations to each
other. A 3rd table C, inherits from A. A...
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by: Ian Davies |
last post by:
I have created a database with about 17 tables. I have been creating foreign
keys some of which have worked but when creating others I get the message
below
*************************
1005...
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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...
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by: King |
last post by:
Hi
I have following MS Acess query
Here is the query
ID Name Prgm ID Client ID Date Start Time End
Time Minutes
C4 Trisha TIP DEK0703 7 /7 /2006...
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by: rbarber |
last post by:
I have to synchronize 2 databases hourly but am having difficulty maintaining foreign key relations. These tables use auto-increment columns as primary keys, with child records in other tables...
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by: apax999 |
last post by:
Kinda new to SQL, using SQL Server 2005.
I have some foreign keys in a couple of tables. I need to drop these
tables, but can't since I'll get the error:
Msg 3726,
Level 16, State 1, Line...
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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: ryjfgjl |
last post by:
If we have dozens or hundreds of excel to import into the database, if we use the excel import function provided by database editors such as navicat, it will be extremely tedious and time-consuming...
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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: Hystou |
last post by:
There are some requirements for setting up RAID:
1. The motherboard and BIOS support RAID configuration.
2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
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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: 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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