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by: steve |
last post by:
To gain performance, do I need to index ALL the fields in the where
clause.
Say we have a query like:
select stuff from table where field1=.. and field2=...
If field1 selection substantially reduces the number of records
selected, do we really need to index field2 as well.
In other words, does the query first subselect from the first argumet,
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by: Amir |
last post by:
Hi all,
I have a table called PTRANS with few columns (see create script below).
I have created a view on top that this table VwTransaction (See below)
I can now run this query without a problem:
select * from dbo.VwTransaction
where
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by: sunny076 |
last post by:
Hi,
I am confused with the syntax for NOT in MYSQL where clause and wonder
if an expert in MYSQL can enlighten me. There are possibly two places
NOT can go in:
select * from employee_data where NOT employee_id LIKE 'A%'
select * from employee_data where employee_id NOT LIKE 'A%'
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by: Barry Edmund Wright |
last post by:
I would really appreciate your assistance.
I am using Access 2000 to create a form that Lists Names and Addresses based
on a number of selection criteria one of which is a combo box cboPCZip. All
the selection criteria are used to build a Where clause (strWhere1).
If optBeginsContains = 1 Then 'Return records Beginning with the value in
cboPCZip
strWhere1 = strWhere1 & " And ((tblAddress.strPCZip) like """ & cboPCZip
& "*"")"
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by: David Smithz |
last post by:
Hi,
If you run a query which has a WHERE statement in which has a few
possibilities separated OR statements, e.g.
Select * from table where (Afield = 2) OR (Bfield = 2) OR (Cfield = 2)
In the returned results is it possible to know what particular part of the
WHERE clause a field matched.
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by: Jim.Mueksch |
last post by:
I am having a problem with using calculated values in a WHERE clause.
My query is below. DB2 gives me this error message: Error: SQL0206N
"APPRAISAL_LESS_PRICE" is not valid in the context where it is used.
SQLSTATE=42703
SELECT DISTINCT S3.OPR_APPLICATION_NR,
S3.APPLICATION_ID,
S3.APPRAISAL_TYPE_CD,
S3.Appraisal_Used_Amount,
S3.RPT_LEVEL2_NR,
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by: Emin |
last post by:
Dear Experts,
I have a fairly simple query in which adding a where clause slows
things down by at least a factor of 100. The following is the slow
version of the query
-------------------------
SELECT * FROM
( Select x.event_date From x FULL OUTER JOIN y
ON x.event_date = y.event_date
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by: chrisdavis |
last post by:
I'm trying to filter by query or put those values in a distinct query
in a where clause in some sort of list that it goes through but NOT at
the same time. Example:
ROW1
ROW2
ROW3
ROW4 , etc.
I want to go to the first row, do a WHERE statement, return the
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by: Yitzak |
last post by:
Hi spent a few hours on this one wrote a query that joined on results
of 2 other queries.
Qry3 using Qry1 and Qry2
When I used Qry1.FasText <cstr(Qry2.FasInteger) in the where clause
- got invalid use of null.
Fair enough Field1 and Field2 can contain nulls
I altered the 2 queries to exclude nulls from FasText and FasInteger-
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by: Vivekneo |
last post by:
Hi, iam trying to insert values in the child table, with condition that both pk and fk should match,
pk = stud_id and fk dstud_id.
here is what iam trying
include('config.php');
if (isset($_GET) ) {
$id = (int) $_GET;
if (isset($_POST)) {
foreach($_POST AS $key => $value) { $_POST = mysql_real_escape_string($value); }
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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: 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: 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...
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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: 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: 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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