select distinct ids from studenttable
……………then for each id…………………
select top 1 * from studenttable where id = @id order by timestamp desc

……into one T-SQL statement (IE without using loops/queues)?
BTW I meant cursors not queues

Give this a try:

SELECT a.* FROM studenttable a,
(SELECT id, MAX(timestamp) FROM studenttable GROUP BY id) b
WHERE a.id = b.id and a.timestamp = b.timestamp

I want to search by city name alone. Some cities, such as "Rockford", will return many rows, in several different states.

If I do "SELECT * FROM ziplist WHERE city = ‘Rockford’", I might get:

zip – city – state
=================
00123 Rockford MI
00124 Rockford MI
00125 Rockford MI
60109 Rockford IL
60110 Rockford IL
60111 Rockford IL
60112 Rockford IL
91832 Rockford CA

3 Rockfords in MI, 4 Rockfords in IL, 1 Rockford in CA.
I need a query that will return a table that looks like this:

city – state
=================
Rockford IL
Rockford MI
Rockford CA

So that a user can choose which state he meant to search for, with the most probable result at the top. Very simple; distinct state, sorted by the number of times that state was repeated.

I’m using MySQL Server 4.1.13a.
gman: I think you meant "GROUP BY state",
otherwise it works great! Thanks!

I’m not sure I count as a SQL guru, but I have something you could try.

SELECT state, count(city) as cityCount
FROM ziplist
WHERE city=’Rockford’
GROUP BY state — Of course!
ORDER BY cityCount DESC

Good luck!

select distinct programcode, dept from studentaffairsview where termcode = ‘200900′;

I want to only show results where the programcode appears more than once. Can this be done?
Thanks

This’ll do it.

Select Count(programcode) as Instances, programcode from studentaffairsview
Where termcode = ‘200900′
Group by programcode
Having Count(programcode) > 1

select * from table1
where table1.id in(select distinct id from stuff)
union
select * from table2
where table2.id in(select distinct id from other_stuff);

This query ran like crap. To change it, all I did was add a "group by id" to the end of the the nested queries. The id field can contain duplicates. I don’t understand why the second query runs so much better. Group by and distinct do practically the same thing and give me the same answer. What is Oracle doing that makes the first query suck so much?

Below is the form that works great. Why?

select * from table1
where table1.id in(select distinct id from stuff group by id)
union
select * from table2
where table2.id in(select distinct id from other stuff group by id);

Check the query plan on both queries and compare them (or post them here). Maybe that will help explain the difference.

BTW, if the values returned from both branches of the queries are different, then you may also be able to speed up the better performing query by using a UNION ALL instead of a UNION.

UNION removes duplicates (requiring more processing) whereas UNION ALL does not.

This does not seem to work. Its basicly to see if a bed is in use or not.

select bednr from bed
where bednr not in (select distinct bednr from patient
where bednr is not null);

this qry is not running in access any body help me ?

If this is the *exact* query, you’re missing a second closing ) after the second embedded select. Other than that, I don’t see anything wrong with it. Doing two nested INs might not be the most efficient way to do things, but without knowing your table design, I couldn’t recommend anything else.

B)
24^2 times 10^3 = 576,000

C)
All plates end in a digit 0-9, half of which are even.
You have a 1/2 probability of getting an even one at random.

I am very much a beginner with SQL, and I was hoping for some help with a script.

I need to pull records from a table with distinct values for one of the fields and a given value for another field. I want the results to include all of the fields.

In other words…I need a combination of:

select * from tableABC where name = ‘Scott’
&
select distinct ProductName from tableABC

Thanks for any help.

Try the following SQL statement:

SELECT DISTINCT tableABC.Name,
tableABC.Product
FROM tableABC
WHERE (((tableABC.Name)="Scott"));

The DISTINCT should only pull unique values for the Product, but allow every instance of Name = Scott.

This is different than using the DISTINCTROW.

Though I would probably have never created a relational database where these two fields were within the same table. They would have been two separate tables, connected by a Join on some Unique Key.

E is your target event.
R is the total number of ways that event can be achieved
N is the total number of UNIQUE events that can be achieved

1a) E=8 or 2+6,3+5,4+4 R=3 N=21 NOT 36

21 because: 1+1, 1+2, 1+3, 1+4, 1+5, 1+6 = 6 UNIQUE events
2+2, 2+3, 2+4, 2+5, 2+6 = 5 UNIQUE events
3+3, 3+4, 3+5, 3+6 = 4 UNIQUE events
4+4, 4+5, 4+6 = 3 UNIQUE events
5+5, 5+6 = 2 UNIQUE events
6+6 = 1 UNIQUE event

6 + 5 + 4 + 3 + 2 + 1 = 21 TOTAL Unique events possible

Probability is 1/7 or 0.142857 or 14.2857% for rolling an eight.

1b) By saying "at most a total of 5" the assumption I am making is that totals of 2, 3, 4 & 5 are the events.

E =< 5
R = 6
N = 21

Answer is 6/21 or 0.2857 or 28.57% of being a total of 5 or less.

2) Assuming no jokers and assuming that 2’s and below and 8’s and above are NOT included.

First card:
2 < E < 8
R = 20 = 52 – (4 A’s + 4 2’s + 4 8’s + 4 9’s + 4 10’s + 4 J’s + 4 Q’s + 4 K’s)
N = 52

Probability: 20/52 or 0.3846 or 38.46%

Second card would have 51 cards to pick from, ergo:

Assuming card 1 met criteria: 19/51 or 0.3725 or 37.25%

If card 1 met criteria: 0.3846 * 0.3725 = 0.14326 or 14.326% chance of getting two consecutive cards that met the conditions.

3) Starting with AAAAA000 and going through to ZZZZZ999 there are a possible 11,881,376,000 combinations.

26 letters in first position * 26 letters in second position * 26 letters in third position * 26 letters in fourth position * 26 letters in fifth position * 1000 different numbers for each letter set

For R then, there are a possible 1,142,440,000 possible codes that meet the condition of a vowel in the first letter position and an even number in the last letter position.

5 vowels in first position * 26 letters in second position * 26 letters in third position * 26 letters in fourth position * 26 letters in fifth position * 500 numbers that are even for each letter set

Probability: 1,142,440,000 / 11,881,376,000 or 0.09615 or 9.615%

4) 69 students took history of which 35 took math as well. So, 69 – 35 = 34 students that took history alone.

E = history alone
R = 34
N = 100

Probability: 34/100 or 0.34 or 34% chance of selecting a student that took history alone.

5 ) bragging rights just aren’t worth it any more…. LOL, too many questions! I surrender, gonna go gaming.

Hope those answers helped out a bit! )

I tried a function but I am getting some errors.

Here is the code:

CREATE FUNCTION dbo.GetPricePerPiece
(
@orderID nvarchar(50)
)
RETURNS float
AS
BEGIN
DECLARE @resultSet table
DECLARE @pricePerPiece float
SELECT @resultSet=SELECT DISTINCT [Name], Cost FROM OperationsInProgress WHERE (OrderID = @orderID) GROUP BY Name, Cost
SELECT @pricePerPiece=Sum(@resultSet.Cost)
RETURN @pricePerPiece
END

It says must declare scalarValue @resultSet. I can’t declare a table as a scalar value?

Here is the code I tried before I tried to write the function

SELECT DISTINCT Name, Cost
FROM OperationsInProgress
WHERE (OrderID = ‘61316′)
GROUP BY Name, Cost

But I can’t seem to get the Sum of the cost columns.

Any help will be appreciated. Thanks!
I updated my function after looking at some more syntax:

CREATE FUNCTION dbo.GetPricePerPiece
(
@orderID nvarchar(50)
)
RETURNS float
AS
BEGIN
DECLARE @resultSet TABLE
(
[Name] varchar(50),
Cost float
)
DECLARE @pricePerPiece float
INSERT INTO @resultSet ([Name],Cost) SELECT DISTINCT [Name], Cost FROM OperationsInProgress WHERE (OrderID = @orderID) GROUP BY [Name], Cost
SELECT @pricePerPiece=Sum(@resultSet.[Cost])
RETURN @pricePerPiece
END

But i still get the MUST DECLARE SCALAR VARIABLE @resultSet
I tried that, but I get multiple rows of data, and the cost column has a sum of each type.
Dave, that was the correct answer. That and the fact that I forgot to put FROM @resultSet. Thanks for the response.

Well, I learned something new today: triggers and udfs!

I think you have incorrect syntax around the @resultSet table variable. Try something like this

SELECT @pricePerPiece = SUM(Cost)
FROM @resultSet

instead of

SELECT @pricePerPiece = SUM(@resultSet.Cost)