A customer is performing a mass insert from csv files to their production database and receives the error,

"ERROR: insert on table $\text{'}$xyz$\text{'}$ violates foreign key constraint when attempting to insert data into a table." What

could be the cause?

$$The parent table has a matching attribute which is linked using foreign key.

$$ Data is deleted in the parent table before being removed from the child table.

$$Data is inserted in the parent table before being present in the child table.

$$Data is inserted in the child table while being present in the parent table.

$$ Data is inserted in the child table before being present in the parent table.