text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE Employee (eid VARCHAR); CREATE TABLE Certificate (eid VARCHAR)
  ### Question:
  Show ids for all employees who don't have a certificate.
  ### Answer:
  SELECT eid FROM Employee EXCEPT SELECT eid FROM Certificate