by: Lannsjo |
last post by:
I need to change my primary key column type from smallint to int.
I have tried:
ALTER TABLE livegroup MODIFY id INT UNSIGNED NOT NULL AUTO_INCREMENT;
But get an error message certainly since my...
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by: William D. Bartholomew |
last post by:
I'm working on a system that is very address-centric and detection of
duplicate addresses is very important. As a result we have broken
addresses down into many parts (DDL below, but I've left out...
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by: Andreas |
last post by:
Hello list,
what about uniqueness of inherited primary keys ?
eg you have :
create table objects (
id int4,
date_created timestamp(0),
primary key (id)
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by: Fred |
last post by:
Hi.
What is the usual and what are the possible fields to use for the primary
key of an intersecting table of a many-to-many relationship?
I would think the typical, most common fields would...
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by: Tibor |
last post by:
I am using PostgreSQL 7.4.1 (only through psql)
I know, that the command
ALTER TABLE OFFICES
DROP PRIMARY KEY (CITY);
and its foreign key equivalent:
ALTER TABLE SALESREPS
DROP CONSTRAINT
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by: Geoff |
last post by:
Hi
I was wondering if anybody could advice me on the following scenario:
Suppose I have two data tables A and B respectively. Table B contains a
foreign key to a primary key in A. If I add...
|
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: Rick Kay |
last post by:
I have a table that has a Primary key and a foreign key. The primary key is NOT an Identity field, however, the foreign key is. I would like to know if there is a way to have the foreign key reset...
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by: ravichoudhari |
last post by:
i came accross requirement of multiple foreign keys in a table
referencing the same primary key another table. i created the table
relations using the relations editor in access. even though i...
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by: Peter |
last post by:
I am interested in informed feedback on the use of Constraints, Primary Keys
and Unique.
The following SQL statement creates a Bands tables for a database of
bookings Bands into Venues, where the...
|
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
|
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: 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...
|
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: 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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by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing,...
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