Database/Query Design Help

Oct 2, 2005

I am designing an ASP.NET app that can be used to keep track of
attendance at office hours for a class.  The purpose of this is
that we need to know if a student is attending office hours by
different people (so that we can flag them as "in trouble").  I
don't know if I have chosen the best database design, and I'm lost as
to how to accomplish a query I need.

I have a table HoursAttendance that has the following design.

Column_Name   Data_Type   Length   Allow_Nulls
TA              
      char        
      4         
n
Date              
    smalldatetime 4     
    n
Start              
    smallint         
2          n
End              
     smallint     
    2          n
Student1            
bit              
  1          y
Student2            
bit              
  1          y
Student3            
bit              
  1          y
Student4            
bit              
  1          y
Student5            
bit              
  1          y

I chose to have the students as columns because the students don't
change, and then you add rows of office hours.  If students are
the rows, then you would be adding columns as the semester continued
which I thought was odder...?  I'm completely open to suggestions
on Database Design, because I really wasn't sure.

Ok, so now I need useful queries.  The one that I am stuck on (and
also the first one besides select * from HoursAttendance) is that I
want the names of Students who have attended more than x office
hours.  So I need something like

    select <column name> from HoursAttendance where count(sum(<column name>)) > x

Granted a better table design could help with this.  I'm
relatively new to design, so constructive criticism is desired please

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Database Design/query Design

Feb 13, 2002

Ok, I'm doing a football database for fixtures and stuff. The problem I am having is that in a fixture, there is both a home, and an away team. The tables as a result are something like this:

-------
Fixture
-------
fix_id
fix_date
fix_played

----
Team
----
tem_id
tem_name

-----------
TeamFixture
-----------
fix_id
tem_id
homeorawayteam
goals

It's not exactly like that, but you get the point. The question is, can I do a fixture query which results in one record per fixture, showing both teams details. The first in a hometeam field and the second in an away team field.

Fixture contains the details about the fixture like date and fixture id and has it been played

Team contains team info like team id, name, associated graphic

TeamFixture is the table which links the fixture to it's home and away team.

TeamFixture exists to prevent a many to many type relationship.

Make sense? Sorry if this turns out to be really easy, just can't get my head around it at the mo!

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Hi All,
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Hello:

My client has a db with the following structure:

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table a
id pct
1 0.1
2 0.24
3 0.5

table b
year amount
2001 10
2002 20
2003 30
2004 23
2005 67
2006 80

I want to create a table ret
wiht this
year newamount
2006 80*0.1+67*0.24+23*0.25
2005 67*0.1+27*0.24+30*0.25
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hi

i am new to t-sql. the problem is i have to subtract a field from a column A in table X from a field in Column R from Table Y and put the subtracted value in the Column K in the Table Z

ex:

Table Name: Order
Field Name: Boxes

Table Name: Despatch
Field Name: Boxes

Table Name: Balance
Field Name: Boxes

the problem is i have to subtract the values(Boxes) in the table Despatch, from the values(Boxes) in the table Order, and the subtracted value has to be put in values(Boxes) in the table Balance.


can any one help?

one more thing: Where i can get the basics of t-sql



regards.,

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My table has the following data
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I am trying to query for datetime periods which are allocated, eg the table records show from 7am - 10am and 9am - 1pm are allocated.
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I have researched where on similar situations, the use of duration is used, but I am unsure on its application to achieve results.
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Dear All

I have posted this a few days ago, but probably didn’t describe it properly so I’ll attempt it again.

I’m wondering if it’s the design that needs to be changed or I simply can’t put this together.

I have 3 tables.

1. people (peopId, peopFName, peopSName etc.)
2. codes (codeId, codeName)
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Codes represent different skills that people might have, like:

Technology-Founder
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etc.

people, clearly holds data about people.

CodedPeople holds data on which people in the db are coded what skills.

What I need is a query that returns all distinct people records and takes a number of codeNames as input.

So if I have person1 and person2 in the db and they are coded as:

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Person1 is a t-CEO

Person2 is a t-Systems Designer

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Result 1: person1

Query 2, looking for all t-CEO AND t-Founder
Result 2: person1

Query 3, looking for all t-CEO OR t-Systems Designer
Result 3: person1, person2

Query 4, looking for all t-Founder AND t-Systems Designer
Result 4: -


I have:

[ code]
SELECT people.peopId, peopFName, peopSName, peopPhoneHome, peopPhoneMobile, peopEmail, codes.codeId, codename
FROM people INNER JOIN codedPeople ON people.peopId = codedPeople.peopId
INNER JOIN codes ON codes.codeId = codedPeople.codeId
WHERE ( parameter )
ORDER BY peopSName, peopFName
[ /code]

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This works fine when using OR but doesn’t work when trying to use AND in a sense of a person is coded with skill1 AND skill2 AND skill3 etc.

Any idea how to implement what I need to achieve?

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