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PDF Drive is your search engine for PDF files. As of today we have 78,, eBooks for you to download for free. No annoying ads, no download limits, enjoy . Some of the SQL books are available in PDF,.epub raudone.info format as well. Some of the Description: This is a free SQL book from Sams Reference Library. 𝗣𝗗𝗙 | This book offers a short reference tutorial for database engineers and programmers that intends to learn SQL and use it in practice in a.
The second book in the list is about SQL code smells, which talks about common SQL practices which every programmer should avoid dealing with the database. It contains code smells and I think the list is probably growing to , you can find more SQL code smells on their website. This is again a good book for all developers who write SQL queries or deal with the database.
The third and fourth book is about Microsoft SQL Server database, one focus on transaction log management, probably an advanced concept for many developers but very useful for DBAs and the second one is an introductory book on Microsoft SQL server database.
A good book if you want to learn SQL Server from scratch. The list is by no means exhaustive and first, a couple of books are really short which you can finish in a couple of days but they are also packed with a lot of useful information which every programmer who writes SQL query or works with the database should be aware of. This book will immensely help you to improve your application's database performance.
You can download this book as PDF and read offline. You can also check their website for more database performance tips.
The same applies to databases and good database design. An interesting point for all PC-based database programmers is that Microsoft SQL Server does not store the information or data in the database. Remember, the database is a container. Instead, the server stores your data in a table. A database is a collection of objects. This concept is not hard to follow, but it is different enough from the organization of other database programs that it is sometimes a stumbling block for the small-system programmer.
Since this structure is common to most large database systems today, you should become familiar with it.
Your users will be granted a logon ID for connecting to the server, but this does not allow them to get to the data they need. This is done by adding users and groups to each database individually on a need-to-know basis.
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This method of security keeps unwanted users from browsing where they should not while allowing others to do their jobs.
This department might have a door you must pass through, and once you pass through that door, you would see all the cubicles and desks where the actual work is done. This door might be locked in the evening or even require a passkey to enter during the day. The same idea can be applied to a database. The records and files are not strewn around the office; they reside in filing cabinets and in folders or ledgers for ease of access. You use tables, stored procedures, and indexes to find what you need when you need it.
No one gets access without a valid key or password. I will not try to recommend a security method here because of the diverse requirements in the market today. However, I will say that Microsoft SQL Server will accommodate a strict security model very well and still allow for the simple, trusting models required by smaller companies growing into Microsoft SQL Server.
During installation of Microsoft SQL Server, you will not be concerned with these divisions or security, but you should make a few assumptions on the amount of disk space you will need to accommodate these areas and how you will accommodate these needs.
Another preinstallation issue is choosing a character set and sort order. A character set is the basic text and symbols that are loaded in your system. Regardless of the character set you choose, the first characters are the same. The extended characters, including language-specific characters, reside in the remaining half of the character set.
Your decision depends on whether you are doing business overseas or in other languages and need to store text and special characters.
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In most cases, the default is fine and should provide you with what you need to function. You should make this determination prior to installation. Changing character sets can be a daunting task with many system ramifications. If your company is concerned about character sets, chances are you are experienced in these issues and this feature should be nothing new to you.
Another interesting issue concerns sort orders. This is fine and probably the best default setting. It is not, however, the fastest setting you can use on your system. Note: Microsoft is not trying to slow you down. Most programmers are not as careful as they could be and do not always exercise consistent case sensitivity when they write code.
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The use of this setting has some impact on how you perform certain tasks down the road, so choose it carefully. It will change all of your SQL scripts, stored procedures, and client pass-through code to be case-sensitive.
If you type a statement and use a different case than was specified when the table was created, you will get an error message. Say, for instance, you have a table called MyTable on your system. Binary sort order poses a few issues in developing client software, and great care should be taken when using it.
Your ad hoc queries might not return what you expect back from the server, either. Reports are not inherently smart enough to tell the difference, and your code needs to allow for this. If you store, access, and check for case sensitivity on your entire system, binary is the way to go. I have configured two identical machines installed from scratch with the same data sets stored in different sort orders.
My tests have proven that binary is faster for a lot of common operations. If you are putting third-party applications on your server, make sure they run as expected in this sort order. If in doubt, call the vendor or technical support for the product in question. I often use binary sort orders as an example of a setting that restricts programmers in a way they might find difficult. Because of the case-sensitive nature, programmers must write code with more care than they would otherwise.
The end result is faster, but getting there might be more difficult. Users of the system should also be considered when selecting binary sort orders. If a system allows for ad hoc reports or queries and a user does not know that the data is stored with case sensitivity, he or she might not get the expected results. This can be dangerous when converting legacy systems.
Make the decision to use a binary sort order only after carefully weighing the impact on your entire organization. Another consideration in choosing a character set and a sort order is whether you are setting up a distributed server environment.
If you are, you must use compatible character sets and sort orders among your servers. If you are going to share, replicate, or distribute data, use a common character set and sort order throughout your enterprise. Do not forget that in business today we must occasionally share data with other companies. Let me first comment on the Microsoft recommendations for your system and what I have found to be a more realistic configuration for your server. Recommendations are intended to give you an idea of where to start and should not be considered the end solution or setting for your system.
The system requirements for installing Microsoft SQL Server are actually very easy to meet, often leading the administrator into a false sense of security with regard to how well the server will perform. See Table 1.
Table 1. This type of machine should be considered a candidate for development environments or servers with only the lightest of loads in a production situation.
Given the low cost of Pentium-based processors, I would recommend no less than a Pentium-class machine in a production environment. Taking into account the upgrade and support paths for these machines, even a Pentium Pro system is well within the reach of just about any enterprise.
I am not suggesting you throw your current machine away or scrap your plans for a cheaper alternative. I know budgets and real-world requirements often do not allow a top-of-the-line machine for your project.
The idea is to put your best-performing machine where it will do the most good. If you are using existing hardware for your data server, take a good inventory of what makes the target machine tick.
Know the particulars of the disk access time and memory configuration. Benchmark the machines where possible to get an idea of how well it is performing against others in the same class. You might find a less-expensive alternative to the planned configuration. RAM is another highly performance-sensitive item that can make or break your server. The minimum recommendation of 16MB is for a bare-bones server that will perform on a limited basis as a data server.
The 32MB reference for a replication server is more in line with a minimum memory configuration for a production server. On a high-volume multiuser system, servers with a greater amount of RAM would be much more efficient.
Do not forget the option of moving to a multiple-processor machine. Some existing servers can be upgraded to multiple-processor configurations very reasonably. Many unique situations require individual configuration considerations, but adding RAM to a machine is the best first step in getting better overall performance. The best rule of thumb is to look at the system load and determine if you need more RAM in your system. Hard drives are an often-overlooked performance bottleneck on database servers.
Consider the performance of your disk controller and disk access times to make sure you have not slowed your fast machine to a crawl with an older disk thrown in a new box. The axiom that you are only as fast as your slowest link really applies here.
I have seen administrators spend extraordinary amounts of time troubleshooting performance issues on data servers with older disks or bit network interface cards.
Be sure to look at all the pieces. No piece in the chain of client-server communications should be overlooked. Keeping in mind that the optimum configuration is not always possible, I will describe what I think is the best place to install a Microsoft SQL Server on your network. In a strictly Microsoft network environment which we all know is not very practical with the number of legacy systems out there , Microsoft talks of domain structures. Your data server should be used solely as a server on the network.
Try not to place additional services or processes on your data server, because they will add to overhead and slow the performance of the data services.
Primary domain controllers PDCs have the useful role of logging people on and off your Microsoft network. They also handle synchronization with backup domain controllers BDCs on your network.
This service allows for NetWare files to be shared through Microsoft shares on your server. Although this is often a convenient way to get to your files, putting these files on your database server adds to the overhead of that machine. You should strive to install your server on as clean a machine as possible—one that will only be used for database services. Keep shared file access off your database server. Having users copy files to and from the server will move the disk heads unnecessarily.
Do everything you can to keep it to a minimum. As you might be noticing, Microsoft appears to be moving toward a distributed server network. All the servers do not have to be on independent machines, but this configuration will help distribute the load across your network, allowing you to put lighter-weight and lower-cost servers in place for mail and file services and put your money where production is, such as on data services.
This distribution can be a good thing, but many companies fail to recognize this until they have put all their eggs applications, services, and files in one or two baskets servers.
Plan for growth. By definition, databases will grow given even normal use. Over time any system that is being used in production will expand not only in feature and function, but in the amount of data as well. Install it as a server that is part of a domain provided you are using the Microsoft domain model.
Place any other applications on separate machines when possible. If multiple applications are running on the same machine, you are complicating the process unnecessarily. In addition, beware of disk-intensive applications running on your database machine. Note: The cost of adding a low-cost machine with a good-size disk to the network versus the cost in performance by having all these services running on the same box quickly becomes a non-issue.
This account setup is covered in detail in the next chapter, which includes step-by-step installation on a few different machines. The master database is the brains of your server. Great care should be taken when modifying any information contained in the master database. You should get in the habit of backing up your master database whenever you make environmental changes to your server, including changing the sizes of databases or adding users. Print it out and put it in a clear, visible place to help keep your system in a good recoverable state.
The size of the master device is another important consideration. This value is totally dependent on the system that it must support. Many things affect the size of the master device. For most production systems, you must alter the size of the master device when adding major components to the server. Most end up in the 30MB range unless they need an abnormally large Tempdb. Upon installation, I usually change this setting to 30MB to avoid having to resize it a few weeks down the road.
The additional 5MB of disk space will not hurt the server and provides more flexibility right off the bat. Keep in mind, however, that the size of the master device can be increased after installation. Having a good understanding of the master device and its components will help you in later configuration and troubleshooting issues. Previous Table of Contents Next The Master Database System tables and environmental information are stored in the master database. Tables such as Sysdatabases, Syslocks, Sysprocesses, and Sysusages store critical information about your server.
Other tables, such as Sysobjects, keep track of the objects that reside in each database on your server; each database has a copy of these tables.
The server will allow you to edit these and other important tables through raw SQL; however, I strongly recommend that you do not modify data in any of the tables in the master through SQL commands. Such modifications should be attempted only when absolutely necessary and only by someone with an intimate understanding of Microsoft SQL Server. Use these tools at your disposal to make server changes. This is not to say that you cannot check these tables for information needed to run your client-server applications effectively.
I have often used information in system tables to find certain server-side permission or relation information. You can read data all day long without making direct modifications to these tables. By default all users of a database will have some kind of permission to access the system tables for that database. This is a requirement for the system to run well and cannot be avoided. You probably have committed to memory the layout of all the furniture in your house or apartment.
The system tables store the information you take for granted, similar to the location and size of the coffee table, the doors, and so on. Incorrectly changing these stored values by hand would in effect move the furniture on you.
This would not lend itself to a good environment for getting to your data. It could in some cases crash your server, rendering it useless. The Pubs Database In a production environment, Pubs does you no good and should probably be removed. This database is used as a learning tool and for testing the basics of your installation. Once your production machine is up and running, you can remove this database from the master device.
The Model Database The model database is like a stencil for creating new user-defined databases. The system tables for user-defined databases are stored in the model. Any stored procedures or users that need to exist in all your user databases should be placed in the model database. By placing them in the model, they will be copied to each successive database that is created. Be careful when placing things in the model. This action will increase the minimum size of your databases and may add unnecessary objects to databases.
Tempdb I often refer to Tempdb as a pad of Post-it notes: very small scratch paper that you use for a short period of time and then discard when you no longer need the information on each piece of paper. Many things can affect the space required for Tempdb. This database is part of the master device by default and resides on disk.
If you have many users on your system, you might need a bigger Tempdb. You might also need a bigger Tempdb if your users have the ability to write their own ad hoc queries or reports, or if a query returns a large number of rows.
So how big is big enough? This is a newsgroup topic in itself. You really have to look hard at what your server is going to handle and make your best guess. This is covered in more detail later. Then move it to RAM and test it again. If your tests show a good margin of improvement, then leave it in RAM.
Otherwise, change it back to disk. After you have installed your server, made setting changes, and established some of the basic configuration options, back up your master database.
Since many Enterprise applications use the relational database at their backend e. SQL has been around for many years and it will be around for many more coming years. It is also one of the matured technology, hence there are a lot of free resources e. I have been sharing some free eBooks on different technologies e.
Some of the books are available for free to read online others you can download in PDF format. These are the books which are made available free from publisher and authors for the benefit of the community. You can either download their PDF version for offline reading or you can read them online.Most of the issues in this section will become common sense once you have set up a NT server and configured it for running SQL Server.
This is best for your users. Perform a search on Mail, and look up your particular mail system and how to configure it to run with Microsoft SQL Server.
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I have configured two identical machines installed from scratch with the same data sets stored in different sort orders. The third and fourth book is about Microsoft SQL Server database, one focus on transaction log management, probably an advanced concept for many developers but very useful for DBAs and the second one is an introductory book on Microsoft SQL server database.
I like to download servers with a good expansion path. I have tried to keep the language of the book as plain-English and matter-of-fact as possible, because that is the way I teach. Install it as a server that is part of a domain provided you are using the Microsoft domain model. After an hour, Ning Xiaochuan finally Exam Questions With Answers felt that the yang in Exam Cram the body was almost completely saturated, controlling the magic sword and stopping the operation.
How do you know if you can trust the sources you consult?
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