Postgresql: Java Driver

for (int i = 0; i < 10000; i++) pstmt.setString(1, "data" + i); pstmt.addBatch();

// Delete try (PreparedStatement pstmt = conn.prepareStatement("DELETE FROM users WHERE id = ?")) pstmt.setLong(1, 1); pstmt.executeUpdate(); postgresql java driver

When fetching millions of rows, avoid OutOfMemoryError by streaming. for (int i = 0; i &lt; 10000; i++) pstmt

// Update try (PreparedStatement pstmt = conn.prepareStatement("UPDATE users SET name = ? WHERE id = ?")) pstmt.setString(1, "Alice B."); pstmt.setLong(2, 1); pstmt.executeUpdate(); Connection Pooling: Don’t Open a Connection Per Request

Always use try-with-resources to automatically close Connection , PreparedStatement , and ResultSet . 5. Handling PostgreSQL-Specific Data Types The driver maps standard SQL types to Java types, but also supports special PostgreSQL types. Working with JSONB PGobject jsonObject = new PGobject(); jsonObject.setType("jsonb"); jsonObject.setValue("\"key\": \"value\""); pstmt.setObject(1, jsonObject); Working with UUID pstmt.setObject(1, UUID.randomUUID()); Working with Arrays String[] tags = "java", "postgres", "jdbc"; Array sqlArray = conn.createArrayOf("text", tags); pstmt.setArray(1, sqlArray); 6. Connection Pooling: Don’t Open a Connection Per Request Creating a physical database connection for every request is expensive. Use HikariCP (the fastest and most popular pooling library).

PostgreSQL supports asynchronous messaging. The JDBC driver can listen for notifications.