SQL


              

SQL


UNION ORDER BY

- 2
- 3

SQL
15. ,
DML

NULL

(INSERT)




UPDATE

NULL-

SQL

16.
INSERT

,
DELETE
DELETE - 2
UPDATE
DML

SQL

17.




,


SQL
18.



(NULL)
,





CHECK

,

- 2

SQL
19.



/FOREIGN KEY





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, ?



- 2
- 3
, ͨ
, ͨ - 2

SQL
20. . .
?
CREATE VIEW
CREATE VIEW - 2







?


SQL

21.


__.
?
,
ר
,

SQL

22. ?




GRANT
. .

ALL PUBLIC
WITH GRANT OPTION



?
? - 2
? - 3




SQL

23. SQL




?
? - 2
?
? - 2
SQL ?

:
: - 2

- 2


SQL
24. SQL ?




- 2


SYSTEMINDEXES -
SYSTEMUSERAUTH -
SYSTEMTABAUTH - ,
SYSTEMTABAUTH - , - 2
SYSTEMCOLAUTH - ,
SYSTEMSYNONS -



SQL
25. SQL (/ SQL)
- SQL?
SQL?
SQL?
SQL
SQL - 2