What is one reason to use variables in SQL Script?

Using variables in SQL Script plays an essential role in managing data and execution flow effectively. One of the key reasons to use variables is to implement flow control logic within complex procedures. When a SQL script involves multiple conditional operations or iterative processes, variables allow the developer to hold intermediate values, make decisions based on those values, and control the execution path of the script.

For example, by utilizing variables, developers can create more dynamic and flexible procedures that respond to different data states at runtime. This includes branching operations where the script can execute certain statements based on the values stored in the variables, effectively managing the control flow of the SQL execution.

While the other options touch on important aspects of SQL programming, they do not capture the core functionality and utility of variables in helping to structure and manage complex control flows. Variables themselves are not primarily designed to enhance data integrity, increase parallelization opportunities, or improve performance logging directly. Instead, they serve as a fundamental tool for building sophisticated SQL workflows through effective flow control.