final String EXPORT_SQL_TEMPLATE = "EXPORT DATABASE '%s' (FORMAT PARQUET);"; 
   String path = "export"; 
   File export = new File(path); 
   if (export.exists()) { 
       export.delete(); 
   } 
   export.mkdir(); 
   System.out.println(export.getAbsolutePath()); 
   try (Connection conn = DriverManager.getConnection("jdbc:duckdb:db001"); Statement stmt = conn.createStatement();) { 
       stmt.execute("CREATE SCHEMA IF NOT EXISTS mydb"); 
       stmt.execute("CREATE TABLE IF NOT EXISTS mydb.student(id INTEGER,name VARCHAR,PRIMARY KEY(id))"); 
       stmt.execute(String.format(EXPORT_SQL_TEMPLATE, path)); 
   } 

   final String IMPORT_SQL_TEMPLATE = "IMPORT DATABASE '%s';"; 

   try (Connection conn = DriverManager.getConnection("jdbc:duckdb:db002"); Statement stmt = conn.createStatement();) { 
       stmt.execute(String.format(IMPORT_SQL_TEMPLATE, path)); 
   } 

 at org.duckdb.DuckDBNative.duckdb_jdbc_prepare(Native Method) 
 at org.duckdb.DuckDBPreparedStatement.prepare(DuckDBPreparedStatement.java:73) 
 at org.duckdb.DuckDBPreparedStatement.execute(DuckDBPreparedStatement.java:121)