EMBEDDED SQL

Embedded SQL

Embedded SQL is a method of writing SQL statements inside a host programming language such as C, C++, or Java. It allows application programs to interact directly with a relational database.

In Embedded SQL, SQL commands are written within the source code of the program and are processed by a special precompiler before compilation. The precompiler converts SQL statements into function calls that the programming language can understand.

🔹 Why Use Embedded SQL?

  • To connect application programs with databases

  • To retrieve and manipulate data directly from code

  • To build database-driven applications

🔹 Key Features

  • SQL statements are embedded inside programming code

  • Uses host variables to pass values between the program and database

  • Supports SELECT, INSERT, UPDATE, DELETE, and transaction control commands

🔹 Example (Conceptual Syntax in C)

EXEC SQL SELECT name INTO :student_name
FROM student
WHERE roll_no = 1;

Here, :student_name is a host variable used to store the retrieved value.

Embedded SQL helps integrate database operations within application development, making it essential for building real-world software systems.

 

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