What is SQL injection?

SQL

Structured Query Language or know better as SQL is used to create and also communicate with databases. SQL can update data or recover a database also, SQL have four data manipulation which are: delete, update, insert, and select a relation or relations in a database.

  1. Delete, remove existing records from the database.
  2. Update, change contents of existing records in the database.
  3.  Insert, add a new records to the database.
  4. Select, retrieve records from the database.

SQL is important for starts it is the only standard database language out there. Many enterprises used Graphical user interface (GUI) to run there company.  Addition, depending on the implementations of data types that a programmer uses can come from different vendors (such as Oracle SQL, IBM, Microsoft, and SQL Server).

SQL Queries

The SQL Queries is one of the use operations used in SQL.

  • From, pick a clear table or tables to be used in the database.
  • Where, choices a row to form the data or information inside a table.
  • Group by, format a group of rows with the same information.
  • Order by; format your output by descending or ascending your information.

SQL injection

“SQL injection is an attack in which malicious code is inserted into strings that are later passed to an instance of SQL Server for parsing and execution (SQL Injection)”. All SQL statements must be look at so that it won’t into the hands of a lethal injection knew as SQL injection, because SQL take in all true queries that it will receives. This can cause SQL server to be attack by someone.

The main type of SQL injection is by simply insert code into user input variable that connects with the SQL instructions. A different way is to inject the virus code into the string of the table. When used a string inside the SQL database it would auto executed the code. SQL injection is used in PHP for website developing and APA applications. SQL injection allows hackers to cause chaos with existing data. That allows hackers to changing variety of data. For example changing bill statement, and deleting existing data from the user. In today world SQL injection is high priority in Internet and database security.

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