题目内容

Question6: How can I add row numbers to my result set？
In database pubs, have a table titles , now I want the result shown as
below,each row have a row number, how can you do that？
Result:
line-no title_id
----------- --------
1 BU1032
2 BU1111
3 BU2075
4 BU7832
5 MC2222
6 MC3021
7 MC3026
8 PC1035
9 PC8888
10 PC9999
11 PS1372
12 PS2091
13 PS2106
14 PS3333
15 PS7777
16 TC3218
17 TC4203
18 TC7777

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Question11: How can I list all book with prices greather than the
average price of books of the same type？
In database pubs, have a table named titles , its column named price mean
the price of the book, and another named type mean the type of books.
Now I want to get the result as below:
type title price
------------
--------------------------------------------------------------------------------
---------------------
business The Busy Executive's Database
Guide 19.9900
...
...
...
...

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