Calculates the arithmetic mean of a set of values contained in a specific query field.
Syntax
Avg ( expression )
Argument expression is a string expression that defines a field with numeric data for which you want to find the arithmetic mean, or the expression that is used to perform the calculation. Operand in expression may be a table name, a constant, or a function (built-in or user-defined, but not otherwise) aggregate function SQL).
Notes
Value obtained using the function Avg, is the arithmetic mean (the sum of values divided by their number). For example you can use the function Avg to calculate the average shipping cost.
Function Avg does not take into account fields with Null values.
Can be used AVG in a query expression and in the SQL property of a QueryDef object, or when creating a Recordset object from an SQL query.
Examples
Expression | Results: |
|---|---|
|
Select AVG([Price]) as Expression1 from ProductSales; |
Returns the arithmetic average of all values in the UnitPrice field from the ProductSales table and is displayed in the Expression1 column. |
|
Select AVG ([Saleprice]) as Avgsaleprice, AVG ([Discount]) as Avgdiscount from ProductSales; |
Returns the average value of the SalePrice and Discount fields in the ProductSales table. The results are displayed in the "Augsaleprice" and "Avgdiscount" columns respectively. Returns the arithmetic average of all "Saleprice" where the "quantity" sold is more than 10. The results are displayed in the "Augsaleprice" column. |
|
Select ABS (AVG ([Discount])) as AbsaverageDiscount from ProductSales; |
Returns the absolute value of the Discount field and is displayed in the AbsaverageDiscount column. |
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Good day, dear friends, acquaintances, readers and other individuals. Today about AVG.
It's been a while since we talked about antiviruses, but they don't stand still, including their free versions (they generally like to change the interface so often that I don't always have time to update it).
As you remember, I have already written about many free and even slightly paid anti-virus solutions, be it the well-known and good old AVZ from the material “”, loved by many “”, already remade 30 times and once loved by me “”, or the very conventional paid "Dr.Web".
In particular, in one of the articles I promised to gradually analyze a variety of antiviruses for you, and therefore I would like to continue to fulfill this promise and talk to you today about AVG.
Let's get started.
What's what and why
Actually, one of my students prompted me to write this material about a few months ago, because previously my acquaintance with AVG was limited to its old version(somewhere at the very beginning of 2013, probably) and then I was not very enthusiastic about this product. Now the situation has changed somewhat and, after testing this antivirus for several months, I finally decided to write a short article.
As in the case of Avast!, for the purposes of this article I will be quite neutral, i.e. I’ll tell you about installation and configuration, but I won’t give my expert assessment and express my opinion, because I don’t like quite a few antiviruses and in general Lately supporter of his own antivirus-free security method.
Download AVG
But let's get to the point. You can download this happiness of a programmer's thought by clicking on the appropriate button:
After this, you will be offered a download option (full trial or free limited), as well as a link to the place (at the time of writing this was SoftPortal) from where the antivirus can be downloaded.
After running the downloaded file, you will need to wait for the installer to unpack and you can begin installation.
The installation is extremely simple, and I will not dwell on it. The free license is generated automatically.
A little about installation
Once you select a component, you can read its description on the left. As you can see, after thinking about it, I turned off email protection, because in the end I left in the home version, and within the browser client, additional verification is a dubious (assuming No-Script is available) advantage.
All you have to do is wait for the installation process to complete, and at the last stage - choose whether you want to help improve the product and whether you want to receive all sorts of news by email.
That's all for now. Let's move on to use.
The main window of the program looks like the picture above (at least at the time of writing) and this interface has recently become more and more standard for all types of antiviruses.
Using AVG and setting up
We, traditionally, are interested in the settings that are hidden under the link " Options - Advanced Options".
On the tab with sound effects, I also turned them off completely, because I don’t like it when something screams like that without my knowledge from my own speakers :)
On the "Scans" tab - " Scan your entire computer" I include heuristic analysis:
This significantly increases the scanning period, but often helps to find large quantity possible viruses during a full system scan.
On sub-tabs" Scan files and folders" And " Shell extension scan"I turned on the checkboxes" Scan system environment".
The remaining settings can be called optional for each user, because, for example, the same check schedule is your personal business in every way. Personally, I still like to do full checks and even updates purely manually, but who cares.
Where to buy a license for AVG antivirus
If you decide to purchase full version program (this means an extended paid version of the antivirus, and not its free component), it is recommended to do this not in retail stores (which not only add a significant markup, but also add to the final price the cost of the box with the program, its delivery to the store, and the cost of rental store and other “logistics”), and in online stores that:
- Firstly, it is cheaper (not only for the reasons stated above, but also because the software is purchased/sold in wholesale quantities);
- Secondly, it’s convenient, because you don’t have to go anywhere and you can pay with a credit card or an SMS from your phone;
- Thirdly, it is quite safe, because the license can be immediately checked and activated (fast delivery of keys via email), which cannot be done in an offline store.
For my part, I would recommend, simply because the place is proven (in any case, people still buy software for home/offices there) and have existed on the software market since 2004. In general, you can read any marketing on the Internet or on a store’s website; my job is to recommend it.
By the way, if suddenly, for some reason, you know a software store that is cheaper (and most importantly, better!), then contact us through , my team and I will consider your option... and maybe we will offer it to the readers in this text. Thank you!
Let's move on to the afterword, however.
Afterword
The only thing I really don’t like about SIM antivirus is the inability to configure automatic actions when various types of threats are detected, i.e. traditional" Found something -> Treat -> If it is impossible to treat, then delete - If it is impossible to delete, then rename or move to quarantine" and other options for similar types of settings.
It’s something like this in a nutshell, but I hope that those who are unfamiliar with this antivirus will still find the material useful.
As always, if you have any questions, additions, thanks, or anything else like that, I’ll be glad to see them in the comments to this post.
Today it is difficult to imagine working for personal computer without an Internet connection. And since there is a connection with the World Wide Web, it means there is a threat of infection by various viruses. They can cause damage to the software and/or hardware of the computer, disclose personal, including confidential, data of its owner, with the help of which attackers can cause irreparable damage to the financial well-being of the latter. Antivirus programs, of which there are a significant number today, are designed to provide protection against such threats. Which one should you choose to use on your computer? Let's try to help in this matter by considering a representative of such software- AVG antivirus.
General information
There is a free version (AVG Free AntiVirus) and two paid versions (AVG AntiVirus and AVG Internet Security), which differ slightly in functionality. All versions are produced by the Czech company AVG Technologies and have recently taken a prominent place in the market for similar software.
How are they different from each other? And is it possible to choose the free version of the product to protect your PC from virus attacks? Let's try to understand these issues.
Free AVG antivirus
According to experts, the range of functions free version"AVG" antivirus allows you to provide reliable basic protection for your PC's operating system. Particularly noteworthy is the advantage of this antivirus product, such as its relatively low consumption of system resources. It reliably provides protection against viruses and Trojans, its database is updated automatically. With its help it is provided secure boot and file sharing, chatting, using gaming programs and watching movies. AVG antivirus for Windows 7, as well as for Windows 8.1/8/Vista/XP, is used in both 32- and 64-bit versions of these operating systems.
In favor free antivirus Evidenced by the fact that this product is the result of the work of a large company with a decent number of specialists in organizing data protection. AVG has paid versions of its products, from which it makes profit.
If software is free, this does not mean that it performs its duties to protect your computer worse. After all, the anti-virus technologies used in both the paid and freely distributed versions are absolutely identical, and the anti-virus databases are equally regularly updated.
Distribution of the free version of the program is, rather, an advertising technique by the manufacturer. He expects that users will be more willing to purchase a paid version of the same company's product if they like the free version. And they'll want it additional functions and technical support from the manufacturer. And in reality, this advertising technique works effectively.
Consequently, basic computer protection will be fully provided by the AVG Free AntiVirus version, it will only lack technical support and some additional features, such as antispam and firewall. There is also no protection for your monetary transactions.
Antivirus - trial version AVG
We considered the possibility of using a free version of an antivirus program. But AVG also offers trial version his paid product AVG AntiVirus Pro for one month without payment. It also runs promotions that offer a free license for AVG antivirus for a year.
It is worth getting into such a promotion and fulfilling the conditions for using it. As a result, you can use it for free for a whole year. full version AVG (antivirus) programs. Registration is like this trial license occurs for the period of its validity - 374 days from the moment of installation on the computer. This offer is only valid for first time installation. of this antivirus on computer.
Step-by-step installation instructions
Before installing the free version of the AVG antivirus program, you should uninstall all other similar programs. Otherwise, your computer may become unstable.
- On the official website offering AVG antivirus, select the free download option.
- Download the installation file.
- Wait for it to finish loading and launch it.
- The installation wizard that opens will prompt your actions at all stages of setting up and installing the application. Select the language Russian and click “Next”.
- You accept the terms of the license agreement.
- Important! When choosing a product (the basic version is offered free or a trial for 30 days), you stop at the first one - basic protection, and put a switch on it.
- You are automatically given a unique license number in the appropriate window, click “Next”.
- Choose express installation - the best option for virus protection.
- Not enough powerful computer a message will be displayed indicating that it does not meet the system requirements. You can refuse further installation. But it's better to continue it.
- Watch the installation process take a few minutes.
- A message appears indicating that the software installation is complete.
- The main window of the anti-virus program will open and the virus database will begin updating.
- After this, a message will appear that the user is protected. Can be checked Windows system by scanning it by clicking on the corresponding button on the control panel.
Antivirus for Android
Statistics show that the activity of viruses aimed at mobile systems based on Android. This is due to the growing popularity of such systems. Developers, in addition to antivirus programs for computers, offer users of Android-based mobile devices not only the free AVG antivirus, but also a version of AVG AntiVirus PRO with a trial free license for a period of one year. This is not only an antivirus, but also a multi-faceted system for completely protecting your phone. It has data encryption and a tracking system if you lose your phone. And also protection against theft, phone locking and much more. A special feature of the program is its low usage system resources and power supply of the device.
If you have installed on your computer antivirus program Can scan all files on your computer, as well as each file individually. You can scan any file by right-clicking on the file and selecting the appropriate option to scan the file for viruses.
For example, in this figure it is highlighted file my-file.avg, then you need to right-click on this file and select the option in the file menu "scan with AVG". When choosing this parameter AVG Antivirus will open and perform a scan of this file for the presence of viruses.
Sometimes an error may occur as a result incorrect software installation, which may be due to a problem encountered during the installation process. This may interfere with your operating system link your AVG file to the correct application software, influencing the so-called "file extension associations".
Sometimes simple reinstalling AVG Antivirus can solve your problem by properly linking AVG with AVG Antivirus. In other cases, problems with file associations may result from bad software programming developer and you may need to contact the developer for further assistance.
Advice: Try updating AVG Antivirus to latest version to make sure you have the latest patches and updates installed.
This may seem too obvious, but often The AVG file itself may be causing the problem. If you received a file via an email attachment or downloaded it from a website and the download process was interrupted (such as a power outage or other reason), the file may become damaged. If possible, try getting a new copy of the AVG file and try opening it again.
Carefully: A damaged file can cause collateral damage to previous or existing malware on your PC, so it is important to keep your computer up-to-date with an up-to-date antivirus.
If your file is AVG related to the hardware on your computer to open the file you may need update device drivers associated with this equipment.
This problem usually associated with media file types, which depend on successfully opening the hardware inside the computer, e.g. sound card or video cards. For example, if you are trying to open an audio file but cannot open it, you may need to update sound card drivers.
Advice: If when you try to open an AVG file you receive .SYS file error message, the problem could probably be associated with damaged or outdated drivers devices that need to be updated. This process can be made easier by using driver update software such as DriverDoc.
If the steps do not solve the problem and you are still having problems opening AVG files, this may be due to lack of available system resources. Some versions of AVG files may require a significant amount of resources (e.g. memory/RAM, processing power) to properly open on your computer. This problem is quite common if you are using fairly old computer hardware and at the same time a much newer operating system.
This problem can occur when the computer has difficulty completing a task because operating system(and other services running in background) can consume too many resources to open the AVG file. Try closing all applications on your PC before opening AVG Antivirus Virus Database. Freeing up all available resources on your computer will provide the best conditions for attempting to open the AVG file.
If you completed all the steps described above and your AVG file still won't open, you may need to run equipment update. In most cases, even when using older versions of hardware, the processing power can still be more than sufficient for most user applications (unless you're doing a lot of CPU-intensive work, such as 3D rendering, financial/scientific modeling, or intensive multimedia work) . Thus, it is likely that your computer does not have enough memory(more commonly called "RAM", or RAM) to perform the file open task.
AVG was founded in 1991 with a clear mission: to protect people around the world with the most modern technologies security. Having achieved success quickly, now AVG time is one of the largest players in the market
List of programs
AVG AntiVirus FREEReliable and fast free antivirus for Windows. Provides basic protection for your computer and your online activity against the latest threats
AVG Internet Security
Fast and reliable comprehensive antivirus with cloud-based and proactive protection of your computer, online activity and confidential data. Also offers data storage and permanent file deletion
AVG Business Security
Comprehensive protection for business clients. Protects against viruses, threats distributed over e-mail and networks, and also includes tools for remote management
AVG AntiVirus FREE for Android
Free antivirus for Android provides real-time protection for your smartphone or tablet, allows you to remotely determine the location of the device and block it in case of theft or loss
AVG Antivirus FREE for Tablets for Android
Free antivirus for Android tablets, web protection and Anti-theft. Provides protection from malicious applications and websites, as well as against loss or theft of the device, thanks to remote control
AVG PC Tuneup
AVG PC Tuneup is a suite of programs that provides the essential tools to help you get the most out of your computer's performance.
AVG Web TuneUp
A web browser plugin from AVG that optimizes your Internet experience by providing protection when searching and visiting websites, clearing browser trackers and allowing you to control your online privacy
AVG WiFi Assistant for Android
Android app to manage and optimize wireless connections on your mobile device, saving battery power and preventing potential tracking via Wi-Fi networks
AVG Family Center for Android
Kids mode for your Android smartphone or tablet. The secure shell offers a variety of children's applications, games and videos. Parental control allows you to manage children's access and activity time
AVG AntiVirus for Mac
Free antivirus for Mac computers with triple protection in real time. Fast, simple and easy-to-use antivirus protection and automatic updates
AVG Family Safety for Windows Phone
Free and secure mobile web browser for Windows Phone, which allows you to protect your children from unwanted websites, and the whole family from online scams, phishing and potentially harmful content
AVG Rescue CD
Antivirus boot disk, based on Linux OS. Designed to be removed malware from an infected system and its recovery
AVG LinkScanner
Real-time scans web pages visited by the user for malicious code and other Internet threats
AVG TuneUp for Android
Mobile application for optimizing Android smartphone or tablet. Allows you to increase time battery life devices, improves stability and increases performance
TuneUp Utilities 2013
TuneUp Utilities includes more than 30 utilities that can increase the performance, speed and efficiency of your computer, increase the battery life of your laptop or netbook
AVG Privacyfix
With AVG Privacyfix, a plugin for Google Chrome and Firefox, you can control your privacy settings on Facebook, Google and other websites you visit, and block tracking of your online activity on the Internet
AVG Anti-Virus Updates
Updating the virus databases of the free AVG antivirus, as well as commercial antivirus programs AVG Anti-Virus and AVG Internet Security