I have created migration and created the database and the tables . For example the tables are
A B C D E . Now again I have changed some part of code and ra
A B C D E
IMHO the most straightforward solution is to generate SQL script form the migration and run only a part of the script, that creates missing tables.
Update-Database -Source MigrationBeforeCreatingTables -Target MigrationAfterCreatingTables -Script