DYNAMIC SQL

 

 Introduction to Dynamic SQL

Dynamic SQL refers to SQL statements that are constructed and executed at runtime instead of being written as fixed queries in the program. Unlike static SQL, where queries are predefined, dynamic SQL allows queries to be created based on user input or program conditions.

Dynamic SQL is useful when the exact SQL statement is not known in advance and needs to change during execution.

🔹 Why Use Dynamic SQL?

• To execute flexible and customizable queries

• To handle dynamic table names or column names

• To build applications with advanced search and filtering options

🔹 Features of Dynamic SQL

• SQL statements are created as strings

• Executed using commands like EXECUTE IMMEDIATE (in PL/SQL)

• Supports dynamic SELECT, INSERT, UPDATE, and DELETE operations

Dynamic SQL provides flexibility in database programming but must be used carefully to avoid security issues like SQL injection.

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