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



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