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SQL tutorial
- Thread starter Antero360
- Start date
Benefits of learning SQL:
Websites that are not static, as well as mobile apps, connect to some sort of database. SQL is the language used to send information to and from the database, which is why it is called Structured Query Language. Being able to write queries for CRUD operations (CReate,Update,Delete) is essential for web/mobile development. Yes, there are tools out there that will take care of the queries for you, such as ORMs (Object-Relational Mapping), however, they are only as good as the simplicity of what you need your queries for...ORMs are not so great for complex queries, such as nested queries..
https://softwareengineering.stackex...why-do-we-not-push-them-to-use-a-higher-level
Great skill to have.
Websites that are not static, as well as mobile apps, connect to some sort of database. SQL is the language used to send information to and from the database, which is why it is called Structured Query Language. Being able to write queries for CRUD operations (CReate,Update,Delete) is essential for web/mobile development. Yes, there are tools out there that will take care of the queries for you, such as ORMs (Object-Relational Mapping), however, they are only as good as the simplicity of what you need your queries for...ORMs are not so great for complex queries, such as nested queries..
https://softwareengineering.stackex...why-do-we-not-push-them-to-use-a-higher-level
Great skill to have.
WRITING SECURE SQL QUERIES:
1. SANITIZE YOUR INPUT BEFORE ANYTHING ELSE. (Server side validation, because javascript validate scripts can always be turned off in browser)
2. USE PARAMETERS FOR YOUR INPUT
3. BE PARTICULARLY AWARE OF MALICIOUS QUERIES, BETTER KNOW AS SQL-INJECTIONS AND BLIND SQL-INJECTIONS
4. NEVER, AND I REPEAT, NEVER STORE PASSWORDS AND/OR ANY VALUABLE INFORMATION IN PLAIN TEXT!!!!!
5. In regards to #4... DO NOT JUST USE A 2-WAY ENCRYPTION SERVICE SUCH AS AEA/DES... If at all possible, implement a 1-way encryption such as
SHA256/512 hashing with salt.
6. Before using SHA256/512 hash method, generate a SALT of 15+ random characters and append it to your input. Then pass that combination to your SHA256/512 hash method
7. Continuing #6. ONLY STORE GENERATED SALT AND RESULTING HASH IN DATABASE.
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