Download Dynamic SQL: Applications, Performance, and Security by Ed Pollack PDF

By Ed Pollack

This booklet is an advent and deep-dive into the numerous makes use of of dynamic SQL in Microsoft SQL Server. Dynamic SQL is vital to large-scale looking dependent upon user-entered standards. it is also invaluable in producing value-lists, in dynamic pivoting of knowledge for company intelligence reporting, and for customizing database gadgets and querying their constitution. Executing dynamic SQL is on the middle of purposes similar to enterprise intelligence dashboards that have to be fluid and reply immediately to altering person wishes as these clients discover their information and consider the implications. but dynamic SQL is feared via many as a result of issues over SQL injection assaults. analyzing Dynamic SQL: purposes, functionality, and safeguard is your chance to benefit and grasp a regularly misunderstood function, together with safety and SQL injection. All features of safety suitable to dynamic SQL are mentioned during this publication. you'll research many ways to avoid wasting time and improve code extra successfully, and you'll perform without delay with safeguard eventualities that threaten businesses all over the world each day. Dynamic SQL: purposes, functionality, and protection is helping you deliver the productiveness and user-satisfaction of versatile and responsive functions on your association appropriately and securely. Your organization's elevated skill to answer speedily altering company situations will construct aggressive virtue in an more and more crowded and aggressive international industry.

Show description

Read Online or Download Dynamic SQL: Applications, Performance, and Security PDF

Similar sql books

Programming Oracle Triggers and Stored Procedures

Complicated Oracle gains reminiscent of triggers and kept techniques make itpossible to construct databases that include enterprise ideas - permitting companiesto reengineer approaches extra fast and successfully than ever. this can be the"bible" for someone designing advanced Oracle databases that incorporatebusiness ideas, and it's absolutely compliant with Oracle 10g.

Inside Microsoft SQL Server 2005: T-SQL Querying (Solid Quality Learning)

Take an in depth examine the inner structure of T-SQL—and unveil the ability of set-based querying—with entire reference and suggestion from the specialists. Database builders and directors get top practices, pattern databases, and code to grasp the intricacies of the programming language—solving advanced issues of real-world options.

R for Everyone: Advanced Analytics and Graphics

Utilizing the open resource R language, you could construct strong statistical versions to reply to a lot of your so much tough questions. R has generally been tricky for non-statisticians to benefit, and such a lot R books imagine a ways an excessive amount of wisdom to be of aid. R for everybody is the answer. Drawing on his unsurpassed adventure educating new clients, specialist info scientist Jared P.

PostgreSQL 9 Administration Cookbook

Over a hundred and fifty recipes that will help you run an effective PostgreSQL database within the cloud approximately This BookAdminister and preserve a fit databaseMonitor your database to make sure greatest efficiencyTips and tips for quick backup and recoveryWho This booklet Is ForThrough example-driven recipes, with lots of code, serious about the main very important gains of the most recent PostgreSQL model (9.

Additional resources for Dynamic SQL: Applications, Performance, and Security

Sample text

Even if friendly errors are displayed, that information would confirm that they have enough access to query the server for information and succeed. Listing 2-16 illustrates some simple examples of the sorts of blind SQL injection queries that might get targeted at a vulnerable server. info CHAPTER 2 ■ PROTECTING AGAINST SQL INJECTION Listing 2-16. password;' EXEC (@sql_command) END TRY BEGIN CATCH SELECT 0 END CATCH; The first three examples use basic yes/no questions in an attempt to learn about the server.

There is no built-in way to manage input or output variables with EXEC. info CHAPTER 1 ■ WHAT IS DYNAMIC SQL? • When using EXEC, it is unlikely that execution plans will be reused. This reuse of execution plans, known as parameter sniffing, is a useful feature and generally something you’ll want to occur. Each of these topics is covered in extensive detail later in this book and can be addressed using the system stored procedure sp_executesql, instead of EXEC. Person'; Whatever TSQL is provided in the string will be executed in the same way as the previous examples.

The limits at this point are restricted only by your imagination. Disable xp_cmdshell on all database servers that could be accessed from outside of your internal network. As an additional safety measure, disable it anywhere that it isn’t absolutely needed! info CHAPTER 2 ■ PROTECTING AGAINST SQL INJECTION In addition to xp_cmdshell, other system stored procedures should have their security limited. xp_regread, xp_regwrite, xp_servicecontrol, xp_loginconfig, sp_addextendedproc, and many others can provide far more access to the server and operating system than you would ever want.

Download PDF sample

Rated 4.30 of 5 – based on 5 votes