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Requirement on data loader

Here am inserting 10000 records through data loader.After  inserting the 2000 records system is restarted.how we can insert the records from 2001.can any one help me 

Deepak Kumar ShyoranDeepak Kumar Shyoran
You can use upsert operation or can remove first 2000 records which have already been inserted.
Praneel PidikitiPraneel Pidikiti
Do you have externalid in the list of mapped fields ? If so just upsert the object using this field if not the easy part is to delete and load as @Deepak  
already mentioned

There are three ways to perform:

1) You have to delete all previous records from system and then try to insert all records which are in you file.
2) You have to delete all records which are already inserted from your file and then try to insert all recrods from data loader.
3) you have to map a field as a external id which will be treated as a id so that record will not be inserted again and you have to perform upsert operation through data loader.