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:
     5,       OracleS,        ,       ,      SQL- INSERT (, ,   ).       ,     .
              :
      ;
        . , 
ALTER TABLE emp ADD CONSTRAINT emp_dept_check FOREIGN KEY deptno REFERENCES dept DEFERRABLE INITIALLY DEFERRED;
 ,         .     ,      ,     emp.        ,     ,  ,    emp,       . ,    ,       ,  OracleS    SQL-  :
SET   CONSTRAINTS   emp_dept_check   IMMEDIATE;
  SQL-92   ,          .  , ,         ,     ,   ,   
40	Orach-