1. 8 -

• ()

Select

2. - -

3. - -

• (number)

• (text)

• ,,, :(date)

( ascending ) ( descending )

4. - -

5. - -

.

:

(secondary key)

6. - -

:

v

7. - -

8. - -

, ..

9. 1 10. 2 11. - -

• , ,

12. - -

• , ,

13. (x1,x2,x3) 14. -

,

15. -

• - Sum ( )

• - Average( )/AVR

Maximum/ Minimum ( )/Max,Min

Count ( )/ Count ()

16. -

:

< >( < > [/< >]())

- /

/

-

17. - 1 , 18. 2 : count(2) - 19. : 20. v , vv v v 21. -

: :

(. , , )

, ,

( : count ( ),

: sum()())

Caption name field name . SW03 2 5 SW04 1 3 SW01 1 3 012 8 22. : , Select/Query -v (. ,., . , ) , , , : ( : count ( )()) . . . SW03 SW101 2 SW207 SW04 SW102 1 SW01 SW201 1 01 101 12 23. - Select

Select

24. - Select

SELECT

• ,

• ,

25. - Select

SELECT [ALL] [DISTINCT][UNIQUE]

< >

FROM [ON < >]

[ WHERE< >]

[ GROUP BY < >] [ HAVING< >]

[ ORDER BY< >]

[ INTO TEMP< >]

26. - Select

• ALL-

• DISTINCT-

• UNIQUE-

• FROM -

• ON -

• WHERE-

• GROUP BY -

• HAVING-

( GROUP BY )

• ORDER BY -

• INTO TEMP -

27. - Select

Select-

• < / >AS< >

• (*)

Where-

< >

• • 1::= /

• • 2 ::= / /

Times New Roman 28. - Select Where < , >, =, #, , = RANGE < >, < >BETWEEN< > and < >, , MATCH(SW01=sw01->.T.) ! MATCH LIKE(SW01=sw01->.F.) NOT LIKE SMATCH! SMATCH 29. - Select

(Projection)

SELECT< >FROM< >

(Selection)

SELECT * FROM< >WHERE< >

,

SELECT< >

FROM< >

WHERE< >

30. - Select

,

(?),(*), %

:

=% ->-, -

=** ->-, -, ,

= ? ->, ,

31. - Select

, ,

• Left/Right(< >, < >)

• Mid (< >,< >,< >)

• :

Left( ,2)=SW

Right( ,3)

Mid( ,3,2)=03

32. - Select

• British : /mm/dd tt:nn:ss

• American:mm/dd/ tt:nn:ss

Year (date)-

Month (date)-

• January, February, March,

Day (date)-

Weekday (date)- vv

• Sunday, Monday, Tuesday, ..

Time (date)-

33.

, 6, 79-80

, 6 62-71

( )