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by: JaNE |
last post by:
Maybe this isn't the most apropriate place to ask mysql related
question, but I think it is close enought to most php users and I always
got find answers on this group.
well, I need to count how meny rows have some maximum number. here is
exact situation (striped down table) (pictID, jpeg name, #of votes)
pict1, name1.jpg, 4
pict2, name2.jpg, 22
pict3, name3.jpg, 5
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by: Daniel Elliott |
last post by:
Hello,
I was wondering if anyone would be able to help me with a problem I'm
having. I'm trying to use the following query:
SELECT Distinct c.site_id
FROM campsite c
WHERE c.site_id NOT IN (SELECT cs.site_id
FROM campsite_status cs
WHERE c.site_id = cs.site_id
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by: Garrett Kajmowicz |
last post by:
Here is the situation:
I have one table that lists a number of courses available (including
CourseID, CourseName and MaxPositions), with CourseID being auto_increment and unique
I have another table which has CourseRegistration (Containing CourseID and
CustomerID), with no unique fields. Customer information is stored
elswhere.
Without having a field in the Courses table holding the number of people
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by: Nick |
last post by:
Im moving a development app (MySQL 5.0) to a different server which
runs MySQL 4.0.20-standard. I am getting errors on queries that have
subqueries such as...
SELECT id
FROM table1
WHERE id IN (
SELECT id FROM table1
)
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by: crane.jake |
last post by:
Hi, I'm trying to find the following information from the table found
bellow.
Year_Sales - # of sales that have occurred this year
Year_Income - SUM(amount)
Month_Sales - # of sales that have occurred this month
Month_Income - SUM(amount)
Today_Sales -- # of sales that have occurred today
Today_Icome - SUM(amount)
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by: Bill |
last post by:
I'm trying to write a query that will select a distinct count of more
than one field. I have records that display user productivity. Each of
the records have a time associated with it and I want to be able to
tell the distinct count of the products numbers and of the pallets ID
that they worked with. Do need to work out some sort of sub-query to do
this?
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by: Pete |
last post by:
I need to create a single query (Not a SQL query) against a single
table that counts the number of records in the table, where the single
field "tmp" contains specific string values
If the field contains "AAA" the count is X.
if the field contains "CCC" the count is Y.
if the field contains "Stop" then count is Z.
I have tried several ways and can not seem to get any where. I get
the same count for all string values. Can some one...
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by: muzu1232004 |
last post by:
Can anyone explain me when we use correlated subqueries rather than nested subqueries.
Do all the correlated subqueries can be written in nested subqueries form as well ?
What are the major conditions that apply whenever we write a correlated subquery and why we go for it ?
Please let me know about this as i am not clear which to use when.
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by: debasisdas |
last post by:
Using Subqueries
==================
The sub query is often referred to as a nested SELECT, Sub - SELECT, or inner SELECT statement.
The sub query executes once before the main query.
The result of the sub query is used by the main query (outer Query).
You can place the sub query in a number of SQL clauses.
WHERE clause
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by: lizandra |
last post by:
Greetings,
I am a newbie, I have been working to extract data from a basic sales db and trying to decide when I should use joins and when I should use subqueries. Much of what I read online says use subqueries only as a last resort, especially correlated ones as they do a record by record data evaluation and are very resource intensive. Are joins and WHERE and HAVING clauses the preferred method for extracting related data?
But in SQL...
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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 effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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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, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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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 Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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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 protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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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, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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