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by: JP Belanger |
last post by:
I have a question on select count(), which may betray my lack of
database knowledge. Here goes.
I have java code driving a transaction which goes like this:
select count(*) from table
(Java code in the same transaction)
if count < 50 then ...
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by: Good Man |
last post by:
Hi all
Well, I didn't want to have to bring this question to someone else to
answer, but I am truly flummoxed and could use some help. It all boils
down to trying to find the number of jobs available in a particular
state. I have two tables, one called STATES and one called WORK. Here
are excerpts from both:
STATES table:
StateID | StateName | StateAbbr
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by: Joseph Shraibman |
last post by:
On a 7.3.4 database:
explain analyse select count(*) from elog;
Aggregate (cost=223764.05..223764.05 rows=1 width=0) (actual
time=81372.11..81372.11 rows=1 loops=1)
-> Seq Scan on elog (cost=0.00..203012.24 rows=8300724 width=0)
(actual time=3.91..71542.53 rows=8313762 loops=1)
Total runtime: 81378.42 msec
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by: JD |
last post by:
Hi guys
I'm trying to write a program that counts the occurrences of HTML tags
in a text file. This is what I have so far:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MB 1048576
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by: Henk Ernst Blok |
last post by:
Hi Posgres users/developers,
Can anyone explain why PosgreSQL (version 7.4.5 on Linux) does a full
table scan to compute a count(*) on a base table after a vacuum analyze
has been done with no following updates that might have outdated any
statistics. Strangly the explain command does give the correct number of
tuples instantaniously from the catalog, as one would expect. Still the
optimizer thinks it needs a full table scan to do count....
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by: sammy |
last post by:
If you have a select with 2 attributes where you group by one attribute
and do a count() for the second attribute, if the count() is 0 then
that row is never displayed. How would you instead see a line item
where you list the attribute with 0 as the count.
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by: Chris |
last post by:
Can't seem to figure out how to do this and have been reading for some
time now......
I want to select a row count from a table name in SYSTABLES.
This statement does not return what I needed, but can help explain what
I'm looking for. I want the results to be the Row Count from a Table
Name out of the Sub-Select.
Select Count(*) from
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by: imran haq |
last post by:
Hi All,
I have 3 rather Long Questions that are causing alot of trouble:
I would appreciate all the help i can get and tried to use A post sent to atli in the past but it did not help...
!) I have an events table, within the events table I have 7 columns,
Alias varchar (30)
Progress int(1)
Val double
Stamp timestamp
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by: petter |
last post by:
Hi!
I have two questions: one question that regards the COUNT-function, and one about how to display a month even if I don’t have any data for that month.
I have an Access database where I want to create a query to count all the internal units in my list (the “input”-table), between two dates. I want my list to be grouped by year and month. Here is the SQL-code, as called from VBA:
strSQL_INTU1 = "PARAMETERS DateTime, DateTime;" _
...
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by: kummu4help |
last post by:
hi,
i am using mysql. i have 3 tables with following structures. these are not actual tables i am working on.
table A
id varchar(16),name varchar(255),InDate datetime
table B
id varchar(16),name varchar(255),InDate datetime
table C
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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: 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: 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: 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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