How to balance security and performance in SQL?

If you find yourself in the world of databases in some way , You must have some knowledge of database security and performance . Database management systems do bring benefits to databases , But have you considered the need to balance security and performance , In order to make your choice most effective ？ This is what this article will discuss .

PART 01

Whether safety and performance are linked ？

First of all, consider a fact , Performance and safety are closely related . The main reason for this is , Developer , Whether junior or senior , At some point in his career, he began to realize ：

• When safety is improved , Achieving performance goals often becomes a little difficult （ in other words , Developers often need “ make every attempt ” To achieve their goals ）
• When improving performance , Sometimes at the cost of safety —— for instance , Relax authority and so on .

use Mark Eldridge Make a description of the drawing ：

I hope you can understand the above meaning through this diagram . Of course , This arrow reflects the tradeoff between security and convenience in password management , This is related to SQL There is no direct relationship between security and performance in , But the two can be compared . Improving security usually means making performance related tasks more difficult , vice versa .

PART 02

SQL Security and performance in

Now? , You may want to know ,SQL in , How performance and security are integrated ？ In a word , Obvious —— When one aspect （ Safety or performance ） In ascension , The other requires additional maintenance measures , vice versa . The following are some of the main measures that database administrators and developers usually think of when considering security and performance ：

As shown in the table above , All choices usually have benefits , Or both advantages and disadvantages . In this field , You also need to consider another problem ： Do you have the knowledge required to perform the operation ？ Not having the necessary knowledge in the field of performance may not necessarily be a bad thing （ Learning knowledge in this field is fast , If one day your query does not perform well , After a day or two, the result may be very different ）, however , In the field of security , Everything is changing and will bite you faster than expected ： Ignore a necessary aspect or mistakenly introduce , We can assure you , In the future, when data thieves knock on the door , You will remember your mistakes （ Consider the example of permissions ： It is dangerous to grant too many permissions to a user , Only absolutely necessary permissions should be granted ）.

In case of performance or safety problems , How do you know how to correct mistakes ？ This is not as simple as it looks at first , So some extra knowledge will help .

PART 03

Consequences of performance and safety problems

SQL Performance and creation in the world 、 Read 、 Update or delete (CRUT) Performance related , Security is usually related to the overall security of database instances , But when something goes wrong , How to determine which previous actions are harmful to the database , Why? ？

Thank goodness , The answer is quite simple —— Look at the consequences of your recent actions , Look at the table below . The following table links the possible measures to be taken before the problem starts with the most likely consequences ：

As you can see , When determining the operation that caused the problem , The result of a particular option should be a good starting point . Each option has its own benefits , But each option also has some impact , So first of all, we need to understand the steps that need to be taken , Evaluate available options , And choose carefully .

Learn everything you need to do , Especially in dealing with performance and security , Especially if you don't have much background knowledge in database field , It could be very difficult ： under these circumstances , First , Find out what kind of database management system you are using , Then read the documentation in the field of performance or security （ Or both , Depends on the need ）.

Once the combination of performance and security is determined , You can consider using it SQL client ： The performance of queries is closely related to how they are built ,SQL The client can not only help build better SQL Inquire about , And good SQL The client provides a series of additional options , For example, options to share query results with the team , Thus, it becomes easy to deal with the data in the database instance .

PART 04

SQL Security and performance of the client

As mentioned earlier , Correctly constructed SQL The client has a very wide range of responsibilities , Including automatically completing queries 、 Generate charts according to the output of the query .

SQL The client not only makes it easier to adjust the performance of the database instance （ for example , Pay close attention to the table structure to ensure that the database always maintains high performance ）, It also allows you to perform other operations , such as , Share written queries with colleagues or teammates . It's like this ：

Use appropriate SQL When the client , Be able to access some very valuable information , For example, it helps you pay close attention to the database schema （ See above ）, Help you deal with the most valuable data , Or automatically complete the query , To help you improve database performance .

Of course , The security of the database instance is still your responsibility ： For small development teams , Passing the database security checklist is enough . perhaps , Take a look at the security part of the selected database management system , Because many security related options depend on which database management system is used .

A good combination of security and performance can fully protect you from threats , At the same time, avoid complaints from database developers or customers . If the database and web Application alignment , You should ：

• Initial (root) Strong password lock is used for account
• Do not provide users with permissions beyond strictly necessary （ for example , Users who only read from the database should only have SELECT Authority, etc ）
• By using firewalls or developers following appropriate security procedures , Can resist, for example SQL Injection and other basic security threats
• It can be completed quickly without hindering other operations web All the queries required by the application （SQL The client is very suitable for this situation ： The client usually provides the millisecond time required to complete the query , therefore , If which query is slow , That's where it starts .）
• It will not reduce the user experience

Among the suggestions given above , If you can take even a small part as part of your daily work , Will help you in SQL Find a good combination of performance and security .

Of course, it's easier said than done , But follow the suggestions given in this article and the selected database management system documentation , Everything can become easy . Don't forget , In the realm of databases , The development and changes of things change with each passing day , What is useful today may not be useful tomorrow —— In order to achieve excellence , Expand knowledge in two areas , And take appropriate measures according to the specific situation .