Oracle11g data recovery prompt cannot insert NULL to non-NULL field

Oracle11g data recovery prompt cannot insert NULL

First, go to oracle enterprise management to delete user and recreate

Command: imp user/password @ servername ignore = y full = y file = bak. dmp log = bak. log

After the operation is complete, enter the SQL deletion prompt table to display the records that have been poured in.

Delete from tablename

Modify the constraints of fields prompted in the Table Structure

Enter the table separately.

Imp user/password @ servername ignore = y full = N file = bak. dmp log = bak. log table = tablename