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by: robert |
last post by:
running 8.1.7 server, 8.1.6 client.
i *thought* inner join should not return nulls, but not only that,
but i get way more rows than i'm expecting.
assume:
order table:
order_number
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by: Ike |
last post by:
Oh I have a nasty query which runs incredibly slowly. I am running MySQL
4.0.20-standard. Thus, in trying to expedite the query, I am trying to set
indexes in my tables.
My query requires four inner joins, as follows :
SELECT DISTINCT
upcards.id,statuskey.status,upcards.firstname,upcards.lastname,originkey.ori
gin,associatekey.username,associatekey2.username,upcards.deleted
FROM upcards,status,origins,associates
INNER JOIN status...
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by: Thomas Beutin |
last post by:
Hi,
i've a speed problem withe the following statement:
SELECT DISTINCT pz.l1_id, pz.l2_id, pz.l3_id, pz.l4_id
FROM ot_adresse AS a, ot_produkt AS p
LEFT OUTER JOIN ot_kat_prod AS pz ON ( p.p_id = pz.p_id )
WHERE p.a_id = a.id AND a.id = '105391105424941' AND a.m_id = '37';
This is terrible slow compared to the inner join:
SELECT DISTINCT pz.l1_id, pz.l2_id, pz.l3_id, pz.l4_id
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by: Brian |
last post by:
Hello All -
I am wondering if anyone has any thoughts on which is better from a
performance perspective: a nested Select statement or an Inner Join.
For example, I could do either of the following:
SELECT supplier_name
FROM supplier
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by: asgars |
last post by:
i have two tables, tab1 having N1 col and tab2 N2 col. now N1 is subset
of N2.
I need the information from tab2 (having N2) of all rows having the
matching entry in N1 in tab1.
For this i am using Inner Join on cols N1 and n2. But result is giving
duplicate rows. Can anyone suggest how do u i remove those duplicate
rows? or may be a better way to do the above work... Thanks
|
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by: moldster |
last post by:
Hi,
I'm at my wits end! I have two large tables one with 1.2mill one with 2.3 mill and they are very wide tables. I have a select with an inner join. All columns used in the join are contained in indexes. But it does an index scan and a massive hashmatch. Why is this? both tables have columns in the index ordered the same, all datatypes of the indexes are ints. The code looks like this.
SELECT TblActivities.*
FROM ...
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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: Zeff |
last post by:
Hi all,
I have a relational database, where all info is kept in separate tables
and just the id's from those tables are stored in one central table
(tblMaster)...
I want to perform a query, so all data from the separate tables is shown
in a view (instead of the reference id's pointing to the separate tables...)
I have some troubles formulating the SQL statement:
I tried:
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by: Chamnap |
last post by:
Hello, everyone
I have one question about the standard join and inner join, which one
is faster and more reliable? Can you recommend me to use? Please,
explain me...
Thanks
Chamnap
|
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...
|
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: 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...
|
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,...
|
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();...
|
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...
|
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: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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