Database

Re: How to access a password protected MS Access database

29-Dec-09 1:53

pc_dev wrote:
I have also tried "Jet OLEDB:Database Password = mypassword" but it dont work

Probably the wrong format for the password-argument, see connectionstrings.com[^]. I expect something like this would work;

_bstr_t ("Provider=Microsoft.Jet.OLEDB.4.0; Data Source = Database1.accdb;User Id=admin;Password=blabla;")

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pc_dev30-Dec-09 6:46

pc_dev

30-Dec-09 6:46

Thanks a lot.

TSQL DATETIME

cdpace28-Dec-09 21:58

cdpace

28-Dec-09 21:58

Hello guys,

I am creating a database script and in this script i am declareing a datetime variable like below

DECLARE @ENDDATE DATETIME

Now my question is that i want to initialize the value of this variable
and i am doing it this way

SET @ENDATE '30/12/2009'

and this is giving me an error saying that i cannot covert from char to datetime. How can this be done guys?

Thank you in advance

Regards,
Christian Pace

Re: TSQL DATETIME

Eddy Vluggen28-Dec-09 23:05

Interesting question about a MIN function and usage

28-Dec-09 23:05

SQL

DECLARE @EndDate DATETIME
    SET @EndDate = '20091230'

Something like this?

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Re: TSQL DATETIME

WoutL29-Dec-09 0:21

WoutL

29-Dec-09 0:21

The default format of a date in sql = MM/dd/yyyy, so 30/12/2009 is indeed an invalid date.

So there are three ways to solve this:

Use set DateFormat dmy
use set @EndDate = '12/30/2009'
use set @EndDate = '20091230'

The first option will allow you to use your own way of using dates.
In the second option you use the current settings of the server. You cannot always be sure of this setting, so I wouldn't use this.
The third option is using the ISO format for dates. I prefer this method because it is language independent.

Wout Louwers

Re: TSQL DATETIME

cdpace29-Dec-09 3:16

cdpace

29-Dec-09 3:16

Thank you that did the trick! Wink | ;)

thx for all the help

James Shao28-Dec-09 15:10

Re: Interesting question about a MIN function and usage

28-Dec-09 15:10

I have a series of time series data. How do I construct a SQL statement to find whether the minimum (or trough) between 2 different dates is smaller than both the values on the starting date and the ending date? My table has StockName, Date, and Price column.

The purpose of this query is to find all the stocks when their price slopes changes from negative to positive. Smile | :)

So if a minimum point does exists between the 2 dates but is smaller than either starting and ending values, it means there's a slope change like the following:

*................*..
..*............*....
....*........*......
.......*....*.......
.........*..........

Could you please provide a sample query statement?

Much thanks in advance!

Luc Pattyn28-Dec-09 15:37

Re: Interesting question about a MIN function and usage [modified]

28-Dec-09 15:37

Hi,

for begin point B and end point E, you could
- select all points X between B and E;
- order them by the distance between val(X) and the smallest of begin and end points = MIN(val(B),val(E));

If any record is selected, you have a V pattern, and specifying "TOP 1" would yield it.

Smile | :)

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James Shao28-Dec-09 21:51

Re: Interesting question about a MIN function and usage

28-Dec-09 21:51

Thank yuo Luc, that is pure elegancy, much better than my original idea which involves 2 separate comparisons.

Could you please let me know how to write that query statement? I currently have the following which doesn't work.... Cry | :((

The time series data is stock price and I want to retrieve all the stocks with that V shape price pattern:

[Edit] Sorry for some reason when I tried to post my code, I got an error internet message and not able post the message. Could you please show me a sample of the query? I'd greatly appreciate it!

modified on Tuesday, December 29, 2009 4:04 AM

Luc Pattyn29-Dec-09 0:57

Re: Interesting question about a MIN function and usage

29-Dec-09 0:57

James Shao wrote:
which doesn't work

James Shao wrote:
got an error internet message

that is too vague, nobody can help you without a more accurate description.

Hmmm | :|

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James Shao29-Dec-09 4:24

Re: Interesting question about a MIN function and usage [modified]

29-Dec-09 4:24

Thanks for the reply Luc. Here's a more accurate discription of what my DataTable looks like:

Ticker Date Price
MSFT 1/2/2009 20
MSFT 1/3/2009 19
MSFT 1/4/2009 18
MSFT 1/5/2009 17
MSFT 1/6/2009 16
MSFT 1/7/2009 18
MSFT 1/8/2009 20
MFST 1/9/2009 21
DELL 1/2/2009 11
DELL 1/3/2009 12
DELL 1/4/2009 17
DELL 1/5/2009 17
DELL 1/6/2009 16
DELL 1/7/2009 15
DELL 1/8/2009 15
DELL 1/9/2009 14
AAPL
...
...
...

I need a query to return all the stocks with its price first going down then going up, in other words a V pattern; and the query would need to check whether this happens for a particular date. In the example above, this happened to MSFT on 1/7/2009 when the first V patter is formed.

Not sure if this can be done using SQL, but if possible, could you please help me with it? I'd be very very thankful! Smile | :)

Corporal Agarn29-Dec-09 4:30

Corporal Agarn

29-Dec-09 4:30

<br />
select @minval = min(stockval) from table where stockdate between d1 and d2<br />
select @mindate = stockdate from table where stockdate between d1 and d2 and stockval = @minval<br />

This is just a starting point.

Good luck

modified on Wednesday, December 30, 2009 8:13 AM

Re: Interesting question about a MIN function and usage

James Shao30-Dec-09 12:47

Re: Interesting question about a MIN function and usage

30-Dec-09 12:47

Thank you djj55, a question about the query statement you wrote. Is that 2 different SQL statement, as I don't see anything between the first SELECT and the second SELECT statement. Or could you actually write a statement like that? Because I thought the @minval in the second statement is not defined....of course it's defined in the first statement, but the two statements are not connected, right?

Corporal Agarn31-Dec-09 1:05

Corporal Agarn

31-Dec-09 1:05

Sorry for the confusion. I did notice that I did a cut & paste instead of a copy & paste so I edited my query.

There should be two queries

select @minval = min(stockval) from table where stockdate between d1 and d2;
select @mindate = stockdate from table where stockdate between d1 and d2 and stockval = @minval;

Not being a C programmer I do not normally use the semicolon which in T-SQL is not needed.

Hope this helps.

Problem with the french character with sql server 2005

pranavcool27-Dec-09 18:44

pranavcool

27-Dec-09 18:44

Hi,

I am facing some problems related to french characters. One of the character "₣" is not supported by sql server 2005. rest of the french characters is suppoeted by sql server 2005.

When ever i tried to insert data or run a select query it returns as a question mark "?".

Full text search is provided on table for search functionality.

Select doc_id,1 from DocumentMaster Where 1=1  
AND  (CONTAINS(Document_Filename,  '"*Œ*"') OR  CONTAINS(Document_Filename_French,  '"*Œ*"'))  
AND  (CONTAINS(Document_Filename,  '"*œ*"') OR  CONTAINS(Document_Filename_French,  '"*œ*"'))  
AND  (CONTAINS(Document_Filename,  '"*€*"') OR  CONTAINS(Document_Filename_French,  '"*€*"'))  
AND  (CONTAINS(Document_Filename,  '"*?*"') OR  CONTAINS(Document_Filename_French,  '"*?*"'))

i have read in couple of the site that the data type of the colum should be nvarchar or ntext for french characters to support. I even that. but then also it is not supporting the "₣" french character. Rest french character it is supporting.

please suggest any solution.

Regards,

Pranav Dave

Re: Problem with the french character with sql server 2005

Luc Pattyn28-Dec-09 1:33

Re: Problem with the french character with sql server 2005

28-Dec-09 1:33

Hi,

I don;t know the F-like character your message shows, and which you call a "french character".

What is its name?
Can you show us some words containing it?
do you know its unicode number?
are there things you can do with it successfully?

Smile | :)

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Merry Christmas and a Happy New Year to all.

Eddy Vluggen28-Dec-09 2:24

Re: Problem with the french character with sql server 2005

28-Dec-09 2:24

Luc Pattyn wrote:
What is its name?

"French Franc", a deprecated monetary unit Smile | :)

Luc Pattyn wrote:
are there things you can do with it successfully?

Compare beer-prices with aged Frenchmen?

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Luc Pattyn28-Dec-09 2:33

Re: Problem with the french character with sql server 2005

28-Dec-09 2:33

Eddy Vluggen wrote:
"French Franc"

really? doesn't look anything like the symbol here[^], which is Unicode U+20A3 and should pose no problem at all.

Smile | :)

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Merry Christmas and a Happy New Year to all.

Eddy Vluggen28-Dec-09 2:52

Re: Problem with the french character with sql server 2005

28-Dec-09 2:52

Luc Pattyn wrote:
really?

Yup, they're the same Smile | :)

Well, ehr.. the example doesn't look like that picture, but like the font that it shows below. Scroll down on that link that you sent me and the same symbol should be there in the table "Java Data". It might be that your browser is (temporarily?) set to something different than UTF-8? Or you're using a different font-set, that could also explain it's different appearance.

It shouldn't pose a problem like you said. Then again, it doesn't behave like the 'other' special characters. If I omit the N-prefix in the INSERT statement, then it will indeed put a questionmark in there. Not so for that crazy 'Œ' symbol.

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Luc Pattyn28-Dec-09 3:09

Re: Problem with the french character with sql server 2005

28-Dec-09 3:09

yup.

the 'Œ' character (and eszet 'ß' and most accented characters used in Western languages) is part of code page 1252, whereas the French Franc and most other (possibly obsolete) monetary symbols are not.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

Merry Christmas and a Happy New Year to all.

Eddy Vluggen28-Dec-09 6:34

Re: Problem with the french character with sql server 2005 [modified]

28-Dec-09 6:34

Luc Pattyn wrote:
the 'Œ' character (and eszet 'ß' and most accented characters used in Western languages) is part of code page 1252, whereas the French Franc and most other (possibly obsolete) monetary symbols are not.

Not even the need for a CHCP 1252, since it gets stuffed into a unicode field.

Question seems answered though, I'll wait for the repost Big Grin | :-D

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Eddy Vluggen28-Dec-09 2:19

Help me understand this unusual query... [modified]

28-Dec-09 2:19

Try this one;

DECLARE @TestTable AS TABLE (
    TestCol NVARCHAR(2) COLLATE Latin1_General_BIN
)
INSERT INTO @TestTable VALUES (N'₣')
INSERT INTO @TestTable VALUES (N'Œ')
SELECT * FROM @TestTable

Check whether the column that you're storing data into is really accepting unicode-text, make sure the collation is set correctly, and check whether you're passing unicode or ascii as a parameter Smile | :)

--edit--

pranavcool wrote:
i have read in couple of the site that the data type of the colum should be nvarchar or ntext for french characters to support.

That is correct. Unfortunatly, there's other places where things can go wrong. Even the value of the string that you're inspecting in the debugger is displayed using a font. The task would be to verify that SQL Server works correctly, and then to find the source of the error.

pranavcool wrote:
When ever i tried to insert data or run a select query it returns as a question mark "?".

I'm guessing that this is due to the Management Studio, since you're probably not on DOS using isql. Try a small console-application, you'll see that SQL Server correctly saves and retrieves the character. That is, using the standard SqlCommand and SqlConnection.

You're not displaying the result/seeing the '?' in a browser by any chance?

Are you using MONO? Or an ODBC-driver?

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modified on Monday, December 28, 2009 12:34 PM

Rafferty Uy27-Dec-09 15:44

Rafferty Uy

27-Dec-09 15:44

Hi,

There was a small problem with our app where it allowed users to enter white-space only characters in one of the data fields. So now I'm trying to clean this up.
A colleague of mine sent me this unusual SQL query to find the whitespaces. The script looks like this:

SELECT tblId, ASCII(tblField1) AS 'ASCII Code', tblField1
FROM Table1
WHERE ASCII(LEFT(tblField1,1)) = 32

This query returned 40 rows.

Now, when I try either of the following:

SELECT tblId, ASCII(tblField1) AS 'ASCII Code', tblField1
FROM Table1
WHERE tblField1 = ' ' -- with a single whitespace

SELECT tblId, ASCII(tblField1) AS 'ASCII Code', tblField1
FROM Table1
WHERE tblField1 = '' -- empty string

The above 2 queries return 200,000+ rows.

Why is this so?

Rafferty

modified on Sunday, December 27, 2009 10:23 PM

Re: Help me understand this unusual query...

Luc Pattyn28-Dec-09 1:46