fe7272ae_20__Copy_data_across_databases__Description
[Parameter] -syncDelete [Description] 
If this option is enabled -syncDelete=true, SQL Workbench/J will check each row from the target table if it's present in the source table. Rows in the target table that are not present in the source will be deleted. As this is implemented by checking each row individually in the source table, this can take some time for large tables. This option requires that each table in question has a primary key defined. Combined with an UPDATE,INSERT or UPDATE,INSERT mode this creates an exact copy of the source table. If more than one table is copied, the delete process is started after all inserts and updates have been processed. It is recommended to use the -checkDependencies parameter to make sure the deletes are processed in the correct order (which is most probably already needed to process inserts correctly). To only generate the SQL statements that would synchronize two databases, you can use the command WbDataDiff
20. Copy data across databases
Description