Converts the given SQL statement into the native SQL grammar of the database server.
注意：
This method is not currently supported by the Microsoft SQL Server 2005 JDBC Driver.
语法
public java.lang.String nativeSQL(java.lang.String sql)
参数
sql
A String containing an SQL statement.
返回值
A String containing the converted SQL statement.
异常
备注
This nativeSQL method is specified by the nativeSQL method in the java.sql.Connection interface.