DBMS CROSSWORD

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Across
  1. 2. A single row of data in a table
  2. 4. Language used to interact with databases
  3. 7. Represents missing or unknown values
  4. 8. A column or field in a table
  5. 9. Links rows between two different tables
Down
  1. 1. SQL commands to define database structure
  2. 3. Uniquely identifies each record in a table
  3. 4. The structure or design of a database
  4. 5. A table in a relational database
  5. 6. A real-world object represented in a database