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by: VisionSet |
last post by:
I have a query with 4 tables and plain 'JOIN's
the explain gives the best join order, and it completes in 1.5 secs
I add a single ORDER BY (a calculated column) and the join orders all shift
and the query takes 85secs!
So I read the docs and it suggests STRAIGHT_JOIN to force join order.
now I was using:
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by: Pedro Alves |
last post by:
Hi
I'm having serious problems with a mission critical app that runs on
postgres (and has been running for the past 3 years). It's rather large,
and lately things are not going well. The planner is getting 'nuts',
choosing ways that never end and completly stops the database.
The strange thing is that running the same query with the same database
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by: Joseph Shraibman |
last post by:
I have a query like this:
SELECT ... FROM u, d WHERE d.ukey = u.ukey AND <restrictions on u> AND
(d.status = 3 OR (u.status = 3 AND d.status IN(2,5)));
explain shows:
-> Aggregate (cost=126787.04..126787.04 rows=1 width=4)
-> Hash Join (cost=39244.00..126786.07 rows=387 width=4)
Hash Cond: ("outer".ukey = "inner".ukey)
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by: Martijn van Oosterhout |
last post by:
Today I got the error:
ERROR: FULL JOIN is only supported with mergejoinable join conditions
Which is really annoying since a full join is exactly what I wanted. I
guess the alternative is to do a left join and a right join and merge
them? Is it just that no-one has come up with a way to code this
efficiently?
Maybe someone has a better way to express this. The problem is I have
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by: dmonroe |
last post by:
hi group --
Im having a nested inner join problem with an Access SQl
statement/Query design. Im running the query from ASP and not usng the
access interface at all. Here's the tables:
tblEmployees
empId -- EmpName -- EmpRole -- EmpManager
-------....------------.... ---------....---------------
1........ dan yella..........1..........2
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by: Dave |
last post by:
Guys I am really stuck on this one. Any help or suggestions would be
appreciated.
We have a large table which seemed to just hit some kind of threshold.
They query is somewhat responsive when there are NO indexes on the
table. However, when we index email the query takes forever.
FACTS
- The problem is very "data specific". I can not recreate the
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by: Ironr4ge |
last post by:
Hi everyone,
I was wondering whether is was possible to select only the filtered
records of one form with Recordsource = "C" and open a diffrent form
with recordsource "L" . The way I was thinking accompleshing this was
by using the following innerjoin statement.. and code to open form...
-----------------------------------------------------------------------
Private Sub cmdFilter_Click()
Dim strWhere As String 'The...
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by: jackal_on_work |
last post by:
Hi Faculties,
I have two queries which give me the same output.
-- Query 1
SELECT prod.name, cat.name
FROM products prod INNER JOIN categories cat
ON prod.category_id = cat.id
WHERE cat.id = 1;
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by: =?ISO-8859-1?Q?Ren=E9?= |
last post by:
Hi,
is there a rule of thumb what is better/faster/more performant in SQL
Server 2005?
a) SELECT * FROM A INNER JOIN B ON B.ID = A.ID AND B.Cond1 = 1 AND
B.Cond2 = 2
b) SELECT * FROM A INNER JOIN B ON B.ID = A.ID WHERE B.Cond1 = 1 AND
B.Cond2 = 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, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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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 tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
|
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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: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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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: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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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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