SQL Crossword Puzzle

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1234
Across
  1. 2. SQL function to retrieve data from a database. (6 letters)
  2. 3. SQL command that removes specific rows from a table. (6 letters)
  3. 4. A keyword used to combine rows from two or more tables, based on a related column. (4 letters)
Down
  1. 1. SQL keyword used to define a condition for filtering rows in a query. (5 letters)
  2. 3. Command used to permanently delete a table or database. (4 letters)