Database Fun

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Across
  1. 5. It is a placeholder for an unknown value.
  2. 7. The column or set of columns that uniquely identifies a row in a table.
  3. 8. A placeholder in a SQL that must be replaced with a valid value for the statement to execute
  4. 10. A set of rules that define valid data.
  5. 11. A situation in which resources are held by two or more connections that are each needed by the other connections.
Down
  1. 1. A join formed between two tables that also include the values from one table that do not have matching rows in the other.
  2. 2. A file that provides a chronological log of database messages and errors.
  3. 3. A data structure that helps speed data access.
  4. 4. The key linking a record to a record in another table.
  5. 6. SQL commands modifying data (AKA Data Manipulation Language)
  6. 9. SQL commands used to modify schema (AKA data Definition Language)