application-security
Parameterized Queries
Parameterized Queries (Prepared Statements)
Definition
Parameterized queries separate SQL code from user-supplied data by using placeholders that the database engine fills in after parsing the query structure. This prevents SQL injection by ensuring user input is always treated as a data value, never as executable SQL syntax.
Parameterized queries are the most effective and reliable defense against SQL injection and should be used in all database interactions that incorporate variable data.
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