Java
Prepared Statement in Java
Use JDBC PreparedStatement for parameterized SQL queries and repeated database operations.
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- PreparedStatement is a Java interface in the
java.sqlpackage, extendingStatementfor executing parameterized SQL queries. - Precompiled Queries: SQL statements are precompiled and stored, improving performance for repeated executions.
- Parameterized Queries: Uses placeholders (
?) for dynamic values, set via methods likesetInt(),setString(), etc. - Prevents SQL Injection: Automatically escapes special characters, enhancing security over raw SQL concatenation.
- Improved Performance: Reduces parsing overhead for repeated queries, as the database caches the execution plan.
- Type-Safe Data Handling: Ensures correct data types for parameters, reducing runtime errors.
- Batch Execution: Supports batch processing for executing multiple statements efficiently.
- Close Resources: Must be closed (e.g.,
pstmt.close()) to free database resources. - Use Cases: Ideal for dynamic queries, frequent executions, or when security is critical.