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
...
|
by: Andrew Kuebler |
last post by:
When I type:
Show keys from ;
I do not see foreign keys listed there and I cannot seem to find any
command that will list foreign keys. Can anyone help?
Also, I notice Innodb tables only...
|
by: Andrew DeFaria |
last post by:
I created the following .sql file to demonstrate a problem I'm having.
According to the manual:
If |ON DELETE CASCADE| is specified, and a row in the parent table
is deleted, then InnoDB...
|
by: Jeff Silverman |
last post by:
I am working on my first database and I think I want to build a table with
a foreign key in it. The O'Reilly book on MySQL says that MySQL does not
support foreign keys, but it still talks about...
|
by: Simon Bond |
last post by:
Hi there, I should point out I am very new to MySql, im trying to learn what
I can.
Basically im using Navicat to work with my databases.
When making a foreign key, i am asked to enter the...
|
by: heroe |
last post by:
Hello *,
i write you with an urgent problem. I would like to create forign keys
to datetime field, but it doesn't seem to work. I get Can't create table
'.\sampleDB\student_module.frm' (errno:...
|
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...
|
by: clops |
last post by:
Dear Collegues,
can anyone explain me WHY the following set of instructions does not
spit any errors (MySQL 5.017) -- the second insert should not have
worked as it references a non-existing...
|
by: kal stevens |
last post by:
I have been trying to write a database schema in mysql, and I cant
figure this out.
Here is a database schema
DROP DATABASE IF EXISTS d;
CREATE DATABASE d;
|
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: 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: 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...
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by: nemocccc |
last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
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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: 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...
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by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...
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