SQL Trivia

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Across
  1. 2. A unique value given to an entity to identify it
  2. 5. Also known as a record, a horizontal entity
  3. 10. A field that contains no value
  4. 11. A command to retrieve data
  5. 13. A virtual table shown based on results of a SQL statement
  6. 15. Used to explain the statement/ prevent it from executing
  7. 16. A command to add the newest data
  8. 18. Another word for "question"
  9. 19. Clause used to join tables together
  10. 20. A value that links two or more tables together
  11. 21. Used to give tables, columns, etc. temporary names
Down
  1. 1. Stored code for repetitive use
  2. 3. Used to replace one/more characters in a string
  3. 4. Used to do math with chosen data
  4. 6. A reserved word/character in the SQL code, specifies conditions for the SQL statement
  5. 7. Statement that goes through multiple conditions and returns one true result
  6. 8. Vertical entity
  7. 9. A command to remove data
  8. 12. A language for data manipulation
  9. 14. A command to add data
  10. 17. The word used to describe the "grammar" for the program