by: Tim Fountain |
last post by:
We've recently enabled slow query logging on a server and it's proving
interesting seeing which queries are bogging things down. This one is
puzzling me a little:
SELECT articleid, type,...
|
by: M Wells |
last post by:
Hi All,
I have a table that currently contains approx. 8 million records.
I'm running a SELECT query against this table that in some
circumstances is either very quick (ie results returned in...
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by: Philip Yale |
last post by:
I'm hoping somebody can explain exactly what's going on here - I can't
find it documented anywhere.
Go to the Northwind database, and run the following SQL:
create index IX_UnitPrice on...
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by: Steven D.Arnold |
last post by:
I have a query which does not use column indexes that it should use. I
have discovered some interesting behaviors of Postgres which may
indicate a bug in the database's query planning.
Take a...
|
by: Együd Csaba |
last post by:
Hi All,
how can I improve the query performance in the following situation:
I have a big (4.5+ million rows) table. One query takes approx. 9 sec to
finish resulting ~10000 rows. But if I run...
|
by: Pakku |
last post by:
This is on DB2 V7 on OS/390
I have 2 tables PATIENT and SPECIMEN.
PATIENT columns are
IDENTIFICATION
LAST NAME
FIRST NAME
SPECIMEN columns are
SPECIMEN_NUMBER (this is a manufactured...
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by: ED |
last post by:
I am attempting to to write a query that has a numerous nested IIf
statements. The problem that I am having is that it is to long of a
query to be built in design mode and when I build it in sql...
|
by: CSN |
last post by:
I have a pretty simple select query that joins a table
(p) with 125K rows with another table (pc) with almost
one million rows:
select p.*
from product_categories pc
inner join products p
on...
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by: Vinod Sadanandan |
last post by:
A Roadmap To Query Tuning
============================
For each SQL statement, there are different approaches that could be used to retrieve the required data. Optimization is the process of...
|
by: CloudSolutions |
last post by:
Introduction:
For many beginners and individual users, requiring a credit card and email registration may pose a barrier when starting to use cloud servers. However, some cloud server providers now...
|
by: ryjfgjl |
last post by:
In our work, we often need to import Excel data into databases (such as MySQL, SQL Server, Oracle) for data analysis and processing. Usually, we use database tools like Navicat or the Excel import...
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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: aa123db |
last post by:
Variable and constants
Use var or let for variables and const fror constants.
Var foo ='bar';
Let foo ='bar';const baz ='bar';
Functions
function $name$ ($parameters$) {
}
...
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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: 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: 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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