Database

Re: Please help me about query

24-Apr-06 2:31

Something like this:

SELECT
        CompanyName, 
        SUM(CASE WHEN [Year] = 1997 THEN [Total Sales] ELSE 0 END) AS [1997],
        SUM(CASE WHEN [Year] = 1998 THEN [Total Sales] ELSE 0 END) AS [1998]
FROM MyTable
GROUP BY CompanyName

"On two occasions, I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question."
--Charles Babbage (1791-1871)
My: Website | Blog

taoquandecor24-Apr-06 18:29

taoquandecor

24-Apr-06 18:29

Thanks Colin Angus Mackay for help me about query

ORDER BY with Renamed Columns

myNameIsRon23-Apr-06 19:24

Re: ORDER BY with Renamed Columns

23-Apr-06 19:24

Hi,
I'm a little confused with the ORDER BY statement....

It seems I can't use a renamed column to sort using ORDER BY.
Eg:
SELECT LastName + ', ' + FirstName AS FullName FROM Suppliers ORDER BY FullName"// this gives an error

but if I have a UNION ALL statement, I do need to use the renamed column to sort:
SELECT LastName + ', ' + FirstName AS FullName FROM Suppliers WHERE LogNumber IS NULL UNION ALL SELECT LogNumber + ' - ' + LastName + ', ' + FirstName AS FullName FROM Suppliers WHERE LogNumber IS NOT NULL ORDER BY FullName"// this works

I realize that I can use ORDER BY LastName,FirstName in the first example, but I just wonder if I should be doing something different.

thanks,
Ron

Colin Angus Mackay23-Apr-06 20:28

Re: ORDER BY with Renamed Columns

23-Apr-06 20:28

The reason is that FullName is not one of the column names in any of the tables. Your solution of using ORDER BY LastName, FirstName would be the one I'd use.

As for the UNIONed SELECT statments, I didn't realise that would happen - I'd have automatically used ORDER BY LastName, FirstName for that too. However, it does make sense in a way - If you look at the execution plan for the query, the FullName column does exist before the output ordering process as all the SELECTs get UNIONed together first.

myNameIsRon24-Apr-06 14:46

24-Apr-06 14:46

Thanks Colin.

Making a field null

myNameIsRon23-Apr-06 11:31

23-Apr-06 11:31

Hi,
I'm working with a Win Form and MS Access.

How can I update a field that is a LongInteger to NULL after it has been set with a value? Yes, the db column is set to accept null.

This of course did not work Blush | :O

)
myCommand.Parameters.Add("@Number", OleDbType.BigInt).Value = null;

Thanks,
Ron

dadax_8523-Apr-06 11:51

dadax_85

23-Apr-06 11:51

try this
myCommand.Parameters.Add("@Number", OleDbType.BigInt).Value = "";

dadax_85@hotmail.com

Colin Angus Mackay23-Apr-06 12:59

23-Apr-06 12:59

That won't work either. An empty string is not null, it is a string of zero length.

Colin Angus Mackay23-Apr-06 12:58

23-Apr-06 12:58

Instead of null, use System.DBNull.Value. This is because in certain cases you will need to distinguish between a C# null and a database null. For example, in the case of ExecuteScalar a null result means that there was no result (i.e. the answer did not exist) whereas if ExecuteScalar returns DBNull.Value then the answer from the database is null (i.e. there is an answer, and the answer is null).

See MSDN: System.DBNull[^]

Does this help?

myNameIsRon23-Apr-06 15:04

23-Apr-06 15:04

I tip my hat to you Colin, thanks!!!

I have another issue with changing the field to DBNull...
but I think this is a C# issue with binding textbox with DataTable
and so I'll post it there as well.

I'm not able to:
if (txb_Number.Text == "")
{
//this never occurs because the textbox reverts to the original bound Long Integer value
}
I can only change the bound data if a new number is used. A blank textbox (or letters entered) only reverts back to the origninal value. I want to update the field to DBNull if the textbox is empty.

Ron

import excel in sql server 2005

dansoft24-Apr-06 4:58

dansoft

24-Apr-06 4:58

Hi Ron,

Please try the following

myCommand.Parameters.Add("@Number", OleDbType.BigInt).Value = DBNull.Value

or

myCommand.Parameters.Add("@Number", DBNull.Value)

Sasuko23-Apr-06 8:04

Sasuko

23-Apr-06 8:04

i need to import inside a sql server 2005 table a file exel
with a column with some strings.

column
-------
sfsdfsfd
dsfsfgg
54432fd
dss43r
gdgdgdfgd43
gdfgdfg43

etc...

how can i do?

Frank Kerrigan25-Apr-06 0:37

Frank Kerrigan

25-Apr-06 0:37

Use DTS

Look where you want to go not where you don't want to crash.

Bikers Bible

Susuko25-Apr-06 9:33

Susuko

25-Apr-06 9:33

what is dts?

Frank Kerrigan25-Apr-06 10:19

Frank Kerrigan

25-Apr-06 10:19

DTS : Data Transformance Services

Used to import export information by SQL server in Packages that can be run as timed or scheduled events.

Look where you want to go not where you don't want to crash.

Bikers Bible

Colin Angus Mackay25-Apr-06 22:32

Sorting Upper and Lower Case Strings

25-Apr-06 22:32

Frank Kerrigan wrote:
DTS : Data Transformance Services

DTS was renamed SSIS (SQL Server Integration Services) in SQL Server 2005 - It didn't happen until the after the first beta went out so the development team decided not to rename all the classes - So the namespace for programatically accessing SSIS still refers to DTS or DataTransformationServices.

Reporting Services

devvvy23-Apr-06 5:19

devvvy

23-Apr-06 5:19

Trying to create a report with tabular format. Run into a few problems...

I have the following entities:
a. Project (Parent of Budget and Contract)
b. Budgets
c. Contracts

So, I created two dataset:

<br />
SELECT     <br />
	PRJ.[ID] AS PROJID, <br />
	PRJ.[Name] AS PROJNAME, <br />
	PRJ.[CreateDate] AS PROJCREATEDATE, <br />
	CTR.[ID] AS CONTRACTID, <br />
	CTR.[Code] AS CONTRACTCODE, <br />
	CTR.[Name] AS CONTRACTNAME<br />
FROM         <br />
	Project AS PRJ INNER JOIN<br />
  	Contract CTR <br />
  	ON PRJ.[ID] = CTR.[ProjectID]<br />
                      <br />
-- DataSet - ProjectBudget:                      <br />
SELECT     <br />
  PRJ.[ID] AS PROJID, PRJ.[Name] AS PROJNAME, <br />
  PRJ.[CreateDate] AS PROJCREATEDATE, <br />
  BDG.[BudgetType] AS BUDTYPE,<br />
  BDG.[BudgetDescMM] AS BUDDESCMM,<br />
  BDG.[BudgetDescYYYY] AS BUDDESCYYYY,<br />
  BDG.[Remarks] AS BDGREMARKS<br />
FROM        <br />
	Project AS PRJ INNER JOIN<br />
  	Budget BDG<br />
  	ON PRJ.[ID] = BDG.[ProjectID]

Now, in my report, I have this ONE table - I wish to have "Project ID" as first column of this table, with TWO drilldown buttons (the "+" sign/button) buttons to respectively show/hide child "Budget" and child "Contract". The problem is, Reporting Service allow one to specify only ONE dataset for each "Table" on the report (right click table, then: "Properties>General>Dataset Name" - only one dataset can be selected.).

I tried to get around this by using "hyperlink" navigation instead of drilldown buttons. But, anyone can tell me if any security issue will get into the way when user navigate from one report to another through embedded hyperlink? Will user be prompted to enter credential twice?

Thanks in advance!

japel23-Apr-06 3:17

japel

23-Apr-06 3:17

Hi All

I have a table I would like to sort by name but found that Upper Case and Lower Case of the same character is not treated the same.

SELECT *
FROM MyTABLE
ORDER BY [NAME]

Are the characters being treated as ASCII Code please help....

When people make you see red, be thankful your not colour blind.

Re: Sorting Upper and Lower Case Strings

Colin Angus Mackay23-Apr-06 4:20