.


:




:

































 

 

 

 





, . 1423.

:

1) 0 ( null, ).

2) Sex EMPLOYEES '' ''.

3) ROOMS , (R_no, Tel) .

4) TITLES , 1.

5) TITLES 100.

 

(4,5) . ( ).

():

1) : ( ), . .

2) : POSTS, ROOMS EMPLOYEES.

3) : , POSTS. AUTHORS, CUSTOMERS, BOOKS, EDITORS, TITLES, ORDERS, ITEMS.

4) : :

AUTHORS, A_passp, A_org, A_pdate, A_INN ( ).

BOOKS, B_advance, B_fee ( ).

EDITORS.

TITLES.

5) , : CUSTOMERS, ORDERS, ITEMS B_title, B_circul, B_price B_rest BOOKS (, , , ).

Transact-SQL.

 

.

, , , .

SQL , , , , , , , .

SELECT . :

 

SELECT < 1>, < 2>,...
FROM < >
[WHERE <>]

SELECT - , , . , .

< 1>,... - , . , , . , , , - .

FROM - , . , - , .

WHERE - , , .

, , ( ). . , . SQL-, . .

SELECT (*) , , :

 

SELECT * FROM < >

, , , , , .

, .

: , :

 

SELECT E_ID,E_NAME, E_BORN FROM Employees





:


: 2016-10-06; !; : 552 |


:

:

, , . , .
==> ...

1779 - | 1630 -


© 2015-2024 lektsii.org - -

: 0.011 .