Database Fun

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