:original_name: ddm_04_0004.html .. _ddm_04_0004: DDM Usage ========= - :ref:`What Do I Do If I Fail to Connect to a DDM Instance Using the JDBC Driver? ` - :ref:`What Version and Parameters Should I Select? ` - :ref:`Why It Takes So Long Time to Export Data from MySQL Using mysqldump? ` - :ref:`What Do I Do If a Duplicate Primary Key Error Occurs When Data Is Imported into DDM? ` - :ref:`What Should I Do If an Error Message Is Returned When I Specify an Auto-Increment Primary Key During Migration? ` - :ref:`What Do I Do If an Error Is Reported When Parameter Configuration Does Not Time Out? ` - :ref:`Which Should I Delete First, a Schema or its Associated RDS Instances? ` - :ref:`Can I Manually Delete Databases and Accounts Remained in Data Nodes After a Schema Is Deleted? ` .. toctree:: :maxdepth: 1 :hidden: what_do_i_do_if_i_fail_to_connect_to_a_ddm_instance_using_the_jdbc_driver what_version_and_parameters_should_i_select why_it_takes_so_long_time_to_export_data_from_mysql_using_mysqldump what_do_i_do_if_a_duplicate_primary_key_error_occurs_when_data_is_imported_into_ddm what_should_i_do_if_an_error_message_is_returned_when_i_specify_an_auto-increment_primary_key_during_migration what_do_i_do_if_an_error_is_reported_when_parameter_configuration_does_not_time_out which_should_i_delete_first_a_schema_or_its_associated_rds_instances can_i_manually_delete_databases_and_accounts_remained_in_data_nodes_after_a_schema_is_deleted