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import java.io.File;            import net.sf.hibernate.dialect.*;                         public class HibernatePagingQueries {                         private static final String _package        = "net.sf.hibernate.dialect.";            private static final String _querySelect    = "SELECT * FROM STUDENT ORDER BY SCORE";            private static final int    _limit          = 10;                         private HibernatePagingQueries() { }                         private void checkLimitSupported(String dbDialect) {            try {            Dialect dialect = (Dialect)Class.forName(_package + dbDialect).newInstance();                         String myDbName = dbDialect.substring(0, dbDialect.indexOf("Dialect"));            System.out.println(myDbName);            if (dialect.supportsLimit()) {            System.out.println("\t" + dialect.getLimitString(_querySelect, false, _limit));            System.out.println("\t" + dialect.getLimitString(_querySelect, true,  _limit));            System.out.println("\t" + dialect.getLimitString(_querySelect, false));            System.out.println("\t" + dialect.getLimitString(_querySelect, true));            } else {            System.out.println("\t" + myDbName + " paged queries not supported");            }                         } catch (ClassNotFoundException e) {            System.out.println("ClassNotFoundException Occured when fileName = " + dbDialect);            } catch (InstantiationException e) {            System.out.println("InstantiationException Occured when fileName = " + dbDialect);            } catch (IllegalAccessException e) {            System.out.println("IllegalAccessException Occured when fileName = " + dbDialect);            } catch (UnsupportedOperationException e) {            System.out.println("UnsupportedOperationException Occured when fileName = " + dbDialect);            }            }                         public static void main(String[] args) {            HibernatePagingQueries pagingqueries = new HibernatePagingQueries();            String srcDirectory = "C:/hibernate-2.1/src/net/sf/hibernate/dialect";            String[] files = new File(srcDirectory).list();                         for (int i = 0, len = files.length; i < len; i++) {            if (!files[i].endsWith("Dialect.java")) {            continue;            }            if (files[i].equals("Dialect.java")) { // IllegalAccessException, abstract class            continue;            }                         String fileName = files[i].substring(0, files[i].lastIndexOf("."));            pagingqueries.checkLimitSupported(fileName);                         }            }                         }            

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DB2            1.1. SELECT * FROM STUDENT ORDER BY SCORE DESC fetch first 10 rows only            1.2. select * from ( SELECT rownumber() over(ORDER BY SCORE DESC) as row_, * FROM STUDENT ORDER BY SCORE DESC ) as temp_ where row_ <= 10            2.   select * from ( SELECT rownumber() over(ORDER BY SCORE DESC) as row_, * FROM STUDENT ORDER BY SCORE DESC ) as temp_ where row_ between 11 and 20            　            Firebird            1. SELECT first 10 * FROM student ORDER BY score DESC            2. SELECT first 10 SKIP 10 * FROM student ORDER BY score DESC            　            HypersonicSQL(HSQL)            1. SELECT TOP 10 * FROM student ORDER BY score DESC            2. SELECT LIMIT 10 10 FROM student ORDER BY score DESC            　            Interbase            1. SELECT * FROM student ORDER BY score DESC ROWS 10            2. SELECT * FROM student ORDER BY score DESC ROWS 10 TO 10            　            MySQL            1. SELECT * FROM student ORDER BY score DESC LIMIT 10            2. SELECT * FROM student ORDER BY score DESC LIMIT 10, 10            　            Oracle            1. select * from ( SELECT * FROM STUDENT ORDER BY SCORE DESC ) where rownum <= 10            2. select * from ( select row_.*, rownum rownum_ from ( SELECT * FROM STUDENT ORDER BY SCORE DESC ) row_ where rownum <= 10) where rownum_ > 20            　            PostgreSQL            1. SELECT * FROM student ORDER BY score DESC limit 10            2. SELECT * FROM student ORDER BY score DESC limit 10 OFFSET 10            　            SQLServer            1. SELECT top 10 * FROM STUDENT ORDER BY SCORE DESC            　            paged queries not supported            FrontBase, Informix, Ingres, Mckoi, NoArgSQL, Pointbase, Progress, SAPDB, StandardSQL, Sysbase