Keep data separate from query structure
When values are inserted into a SQL string directly, quotes and special characters can change how the database interprets the statement. A malicious or unexpected value could alter the condition or add unintended SQL.
A parameterized statement keeps the query structure fixed and sends values through a separate channel. Use the database tool's documented placeholder syntax and pass values in the corresponding parameter fields.
Validate identifiers and business rules too
Parameters generally represent values, not table names, column names, or sort directions. If the query must choose among identifiers, map input to a fixed allowlist rather than inserting arbitrary text.
Binding does not replace validation: check required formats, ranges, and authorization before executing a write. Review the generated query shape and test boundary inputs so the statement changes only the intended records.