Embedded SQL is a method of inserting inline SQL statements or queries into the code of a programming language, which is known as a host language. Because the host language cannot parse SQL, the inserted SQL is parsed by an embedded SQL preprocessor.
Embedded SQL is a robust and convenient method of combining the computing power of a programming language with SQL’s specialized data management and manipulation capabilities.
Why do we need Embedded SQL?
Embedded SQL gives us the freedom to use databases as and when required. Once the application we develop goes into the production mode several things need to be taken care of.
We need to take care of a thousand things out of which one major aspect is the problem of authorization and fetching and feeding of data into/from the database.
With the help of the embedding of queries, we can easily use the database without creating any bulky code. With the embedded SQL, we can create API’s which can easily fetch and feed data as and when required.
Structure of Embedded SQL:
Structure of embedded SQL defines step by step process of establishing a connection with DB and executing the code in the DB within the high level language.
Example: How to connect to a database (using JAVA).
Code[with embedded SQL]:
Class.forName(“com.mysql.jdbc.Driver”);
Connection connection = DriverManager.getConnection( “jdbc:mysql://localhost:3306/DataFlair”,”user”,”root”);
Statement statement = connection.createStatement();
Advantages of Embedded SQL
Some of the advantages of using SQL embedded in high-level languages are as follows:
- Helps to access databases from anywhere.
- Allows integrating authentication service for large scale applications.
- Provides extra security to database transactions.
- Avoids logical errors while performing transactions on our database.
- Makes it easy to integrate the frontend and the backend of our application.