How Can I Achieve Efficient Batch INSERT Operations in Java Using JDBC?

Java JDBC efficient batch INSERT operation

In database-intensive Java applications, optimizing database operations is critical for performance. Batch INSERT operations improve efficiency by combining multiple insert operations into a single operation.

A common question is about the efficiency of batch INSERTs: Should multiple INSERT statements be combined into a single statement containing multiple value sets?

A single INSERT statement contains multiple value sets

The syntax for merging multiple INSERT statements into one statement is as follows:

<code>INSERT INTO some_table (col1, col2) VALUES (val1, val2), (val3, val4), (val5, val6);</code>

This approach can save network overhead by reducing the number of round trips to the database. However, some databases, including Oracle, may not handle such statements as efficiently as individual INSERT statements.

Optimization method using PreparedStatement and batch processing

For efficient batch INSERT operations, the recommended approach is to use a batch-enabled PreparedStatement. This allows you to prepare and perform multiple insert operations in one database connection:

<code>PreparedStatement ps = c.prepareStatement("INSERT INTO some_table (col1, col2) VALUES (?, ?)");

ps.setString(1, "John");
ps.setString(2,"Doe");
ps.addBatch();

ps.clearParameters();
ps.setString(1, "Dave");
ps.setString(2,"Smith");
ps.addBatch();

ps.clearParameters();
int[] results = ps.executeBatch();</code>

This approach benefits from both batching and parameter binding, providing optimal performance and efficient resource utilization. The clearParameters() method ensures that you can execute multiple batches with different parameter values ​​in the same PreparedStatement.

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