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SQL statements - What do they do?

dara_o_c asked
Last Modified: 2012-05-10

I'm trying to understand the following statements do in Oracle.

CREATE ROW TYPE employee_type  (
      ename       VARCHAR(25),
      ssn      CHAR(9),
      salary      INT) ;

CREATE ROW TYPE engineer_type (
      degree       VARCHAR(10),
      license      VARCHAR(20))
      UNDER employee_type ;

CREATE ROW TYPE engr_mgr_type (
      manager_start_date      DATE
      dept_managed      VARCHAR(20))
      UNDER engineer_type ;

What I'm just trying to understand is what does the CREATE ROW TYPE bit do?
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