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I don't know any really good sites. You may want to look at http://www.sqlservercentral.com[^]. Sign up for their newsletter and you will get a little dose of knowledge every day.
The book I learned the most from was written by Ken Henderson: The Guru's Guide to Transact-SQL. It was tough to grasp at first but, it really gives you confidence with the SQL language.
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When I try both of your methods it ask me to enter a value for bd.tboxBeginDate I checked the database and this table has values so I'm not sure whats wrong must be something with the join statement 
Win32newb
"Programming is like Sex, make a mistake and you end up providing support for a long time"
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I am guessing you are not using SQL server. Are you using Access?
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Yeah unfortunately I'm using access for now. We will be converting to sql server soon but for now Access. Sorry I should have been more specific.
Win32newb
"Programming is like Sex, make a mistake and you end up providing support for a long time"
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Access syntax is very different from SQL. The join syntax is really nasty when mulitple joins are involved. I used to write code that converted between the two but, that was many years ago. I think you can modify your original WHERE clause like this:
SELECT
ExpenseReport.tboxBeginDate,
BeginDates.tboxBeginDate
FROM
BeginDates.tboxBeginDate
LEFT JOIN ON
ExpenseReport.tboxBeginDate
WHERE
BeginDates.tboxBeginDate == ExpenseReport.tboxBeginDate AND
ExpenseReport.tboxBeginDate IS NULL
The 'IS NULL' is what I am not sure about. Create a new query and paste this into the SQL view of the query and see if it resolves correctly by going back to the design view. I can't remember how null is resolved in Access. It might be ISNULL([Field Name]) or something like that.
Do remember the following, when NULL is directly compared with a defined value:
BeginDats.tboxBeginDate != ExpenseReport.tboxBeginDate
Your result will be NULL not TRUE as you expected. That is why you would never get the correct result.
-- modified at 14:48 Friday 24th March, 2006
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Thanks for all your help. I was wondering about that != but yeah makes scense kinda like multiplying something by 0 it is always goning to be zero.
again thanks
Win32newb
"Programming is like Sex, make a mistake and you end up providing support for a long time"
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Hello,
I am creating my first procedures in SQL using SQL 2005.
I have 3 tables, with the following columns:
Surveys - [SurveyId](PK) and [SurveyName] Questions - [SurveyId](FK), [SurveyQuestionId](PK) and [SurveyQuestion] Answers - [SurveyQuestionId](FK), [SurveyAnswerId](PK) and [SurveyAnswer]
Each survay can include various questions and each question can include several answers.
This is way I am using the Foreign Keys in both Questions and Answers tables. To relate the tables.
I created a procedure which deletes a Survey given its SurveyId. This is part is done.
I also need to delete all the questions dependent on that survey and all the answers dependent on those questions.
How can I delete survey, its questions and their answers when receiving the SurveyId?
Thank You Very Much,
Miguel
Here is the code of the procedure that I created which in this moment only deletes the survey from the Surveys table:
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go
ALTER PROCEDURE [dbo].[Surveys_DeleteSurvey]
-- Procedure Parameters
@SurveyId As uniqueidentifier
AS
BEGIN
-- Check if SurveyId is null
IF( @SurveyId IS NULL )
RETURN -1
ELSE
BEGIN
-- Return '-1' if a survey with SurveyId given value is not found
IF( NOT EXISTS( SELECT @SurveyId FROM dbo.Surveys WHERE @SurveyId = SurveyId ) )
RETURN -1
END
-- Delete the survey with SurveyId given value
DELETE FROM dbo.Surveys WHERE @SurveyId = SurveyId
-- Return '0' when successful
RETURN 0
END
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You could just implement Cascade on Delete when you implement referencial integrity. But, I always do it the hard way also:
ALTER PROCEDURE [dbo].[Surveys_DeleteSurvey]
(
@SurveyId As uniqueidentifier
)
AS
BEGIN
-- Check if SurveyId is null
IF( @SurveyId IS NULL )
RETURN -1
ELSE
BEGIN
-- Return '-1' if a survey with SurveyId given value is not found
IF( NOT EXISTS( SELECT @SurveyId FROM dbo.Surveys WHERE @SurveyId = SurveyId ) )
RETURN -1
END
-- Delete Answers
DELETE FROM
dbo.Answers
WHERE
SurveyQuestionId IN (SELECT
SurveyQuestionId
FROM
Questions
WHERE
SurveyId = @SurveyId)
-- Delete Questions
DELETE FROM
QUestions
WHERE
SurveyId = @SurveyId
-- Delete the survey with SurveyId given value
DELETE FROM dbo.Surveys WHERE @SurveyId = SurveyId
-- Return '0' when successful
RETURN 0
END
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Hi All,
A couple of basic questions - can SQL server run over a VPN? If so, can it use Windows Password Verification? Can I use SQL Server Express? (has it network capabilities?).
I am moving from an internal networked solution, which has an Access Back end, to a scenario where workers are based around different parts of the country, so I'm thinking SQL Server is the best way forward.
I do use SQL Server over an internal network on another project, but any advice work be greatly appreciated.
Thanks
Jonny
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StyleGuide wrote: can SQL server run over a VPN?
For apps, VPN is basically a normal network, so they can hardly tell the difference. So, SQL can run in a network that is accessed by VPN (or even be run in a VPN client and be used by other computers in the network.)
StyleGuide wrote: Can I use SQL Server Express? (has it network capabilities?).
Yes, but they are not enabled by default. You have to go to the SQL Configuration Manager and enable the SQL Browser Service, and also enable the TCP/IP protocol.
StyleGuide wrote: If so, can it use Windows Password Verification?
I'm not 100% sure on this one, but you should if you are part of a domain.
Luis Alonso Ramos
Intelectix
Chihuahua, Mexico Not much here: My CP Blog!
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thanks Luis, thats really helpful.
Jonny
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You are welcome! I am glad I could be of help 
Luis Alonso Ramos
Intelectix
Chihuahua, Mexico Not much here: My CP Blog!
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hey guys, i was working on a simple login form that i get the UserID from Access database and match ir with selected password also got from that database but I get this erorr message. I just can't figure out what the problem is.
My code :
VerificationConn.Open();<br />
OleDbCommand Cmd = new OleDbCommand("Select PassCode from Password where UserID = '" + ID.Text + "'", VerificationConn);<br />
string lookupPassword = (string)Cmd.ExecuteScalar();<br />
VerificationDA.Fill(VerificationDS, "Password");<br />
VerificationConn.Close();<br />
if(lookupPassword == Pass.Text)<br />
{<br />
}
Error:
System.Data.OleDb.OleDbException was unhandled
Message="Syntax error in FROM clause."
Source="Microsoft JET Database Engine"
ErrorCode=-2147217900
StackTrace:
at System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS dbParams, Object& executeResult)
at System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object& executeResult)
at System.Data.OleDb.OleDbCommand.ExecuteCommand(CommandBehavior behavior, Object& executeResult)
at System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior behavior, String method)
at System.Data.OleDb.OleDbCommand.ExecuteScalar()
at Phone.Verification.button1_Click(Object sender, EventArgs e) in C:\Documents and Settings\Mr.K\My Documents\Visual Studio 2005\Projects\Phone\Phone\Verification.cs:line 38
I thank you in advance
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hi,
try like this.
strSQL="SELECT passcode FROM PassWordTable WHERE Useranme=@Username AND Password=@Password"
'Add the parameters for the query
Dom ComObj as New SqlCommand(strSQL,myConnection)
ComObj.Parameters.Add("@Username",txtUserName.text.Trim())
Like that for password also.
Dim dr As SqlDataReader
dr=ComObj.ExecuteReader(CommandBehavior.CloseConnection)
Try If dr.Read() then
Response.Write("We are logged in")
FormsAuthentication.RedirectFromLoginPage(txtUserName.Text,False)
else
Response.Write("Login failed")
End Try
I hope this helps.
Regards
Bhar
Bharathi
Books for Programmers
http://www.vkinfotek.com
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hey man thanx for your help i did exactly what you said but I still have the same error !! I have changed everything the same. the thing is I used this code somewhere else and it works perfectly but i have no i dea why it doesn't work here !!!
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Are you sure Password is not a keyword in Access? Try [Password] and see if you get better results.
BTW: Why do you fill a dataset when you already have the result from the ExecuteScalar() call?
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mrkeivan wrote: leDbCommand Cmd = new OleDbCommand("Select PassCode from Password where UserID = '" + ID.Text + "'", VerificationConn);
Concatenating text to create SQL queries is a huge security risk. You should use parameterized queries. See this article for more information:
SQL Injection Attacks and Some Tips on How to Prevent Them[^]
Luis Alonso Ramos
Intelectix
Chihuahua, Mexico Not much here: My CP Blog!
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Hey, two questions guys:
1. Visio - Database Model Diagram: I have two tables:
table 1 (Parent): Group {PK: GroupUIN, Attributes: Name, Desc}
table 2 (Child): User {PK: UserUIN, Attributes: ParentGroupUIN, Name, Desc}
I connected the two entities with a "Relationship". Under "Miscellaneous" tab, I specified relationship cardinality: One Group can related to "Zero or More" User. - I am having a hard to "show" cardinality in ER diagram (as supposed to just under "Miscellaneous" tab.
2. How can I generate SQL scripts from Visio ER/Database Diagrams?
Thanks.
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I have an Algoritim in old C/CPP code that will update tables in an Access database. The database is very large and many records are affected. Unfortunately the MaxLocksPerFile Limit gets exceeded. After some research i have a bit more information. That limit can be changed in the registry. The default is 9500 locks. I was wondering if anyone knew of a way to get the current MaxLocksPerFile count. I would like to be able to see how the MaxLocksPerFile count changes as records are being modified. I would like to be able to get around this error without needing to change that limit if at all possible.More information is available at http://support.microsoft.com/kb/q173006/ if anybody else is having a similar problem. Any thoughts or ideas would be greatly appreciated.
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Hello!
I have a problem with accomplishing task mentioned in a subject.
I want to transfer data from MS SQL server database to Ms Access database in Visual Basic.
Till this moment I only achieved to create an empty MS Access database (only structure:tables with fields, but without types). This is done with this simple code:
<br />
Set rs = dataEnv.sqlCon.OpenSchema(adSchemaTables, criteriaTables)<br />
<br />
While Not rs.EOF<br />
criteriaFields(2) = rs!TABLE_NAME<br />
Set cs = dataEnv.sqlCon.OpenSchema(adSchemaColumns, criteriaFields)<br />
Set msTbl = msDb.CreateTableDef(rs!TABLE_NAME)<br />
While Not cs.EOF<br />
With msTbl<br />
.Fields.Append .CreateField(cs!COLUMN_NAME, dbLong)<br />
End With<br />
cs.MoveNext<br />
Wend<br />
msDb.TableDefs.Append msTbl<br />
rs.MoveNext<br />
Wend<br />
msDb.Close<br />
Can anyone tell me how to copy contents of tables?
Thanks in advance!
Greetings!
Daniel
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private void button1_Click(object sender, EventArgs e)
{
string strDSN = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\\db4.MDB";
string strSQL = "SELECT * FROM ta1";
OleDbConnection myConn = new OleDbConnection(strDSN);
OleDbDataAdapter myCmd = new OleDbDataAdapter(strSQL, myConn);
DataSet dtSet = new DataSet();
string sqlQuery = "SELECT Name,Password FROM ta1 where Name = '" + textBox1.Text.ToString() + "' AND Password= '" + textBox2.Text.ToString() + "'";
myCmd.SelectCommand.CommandText = sqlQuery;
int numberOfRowsFeched = myCmd.Fill(dtSet, "ta1");
if (numberOfRowsFeched > 0)
{
try
{
myCmd.UpdateCommand.CommandText = "UPDATE Users SET " + "Password = '" +textBox3.Text + "'" + " WHERE Name = '" + textBox1.Text + "'";
myCmd.UpdateCommand.Connection = myConn;
myCmd.UpdateCommand.ExecuteNonQuery();
MessageBox.Show("Record updated Successfully");
textBox1.Text = "";
textBox2.Text = "";
textBox3.Text = "";
}
catch (System.Data.OleDb.OleDbException exp)
{
myConn.Close();
MessageBox.Show(exp.Message);
}
}
else
{
MessageBox.Show("wrong Name Or Password", "Password", MessageBoxButtons.OK, MessageBoxIcon.Information);
textBox1.Text = "";
textBox2.Text = "";
textBox3.Text = "";
}
message : http://www.cpestudents.net/upload/up/54.gif[^]
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this keywords SET " + "Password as sql command in result is SETPassword, you have to separate by space, just set space character before Password like this
SET " + " Password
_____________________
Proud to be Albanian
_____________________
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mm310 wrote: what is wrong in this code
You have left it wide open to SQL Injection Attacks. While the other response you got will apparently fix your problem it still leaves your code open to attack.
You should read: SQL Injection Attacks and Tips on How to Prevent Them[^]
This will explain a better way to perform your queries that will solve your problem AND make your code safer - Especially for code dealing with a login. What you have here is unforgivable and any tutorial that you have read that suggests you build SQL this way should be recalled and the author lined up and shot! (in my opinion). No wonder Software Developers have a bad reputation when it comes to security if developers think that concatenating strings together to form a SQL query is acceptable on a day-to-day basis. String concatenation as a way to build a SQL statement should only be done after careful consideration that there is absolutely no other way to achieve the desired result.
Sorry for my rant. It isn't your fault - You've obviously read the wrong tutorials and have picked up some extremely dangerous habits.
ColinMackay.net
Scottish Developers are looking for speakers for user group sessions over the next few months. Do you want to know more?
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Hi!,
Most of you will be aware of a critical update on Sql server from Microsoft, it is called SQLCritUpdPkg_ENU.exe, I executed this exe, but it was unsuccessful. I am a local administrator on this machine.
Is there someone out there who can help! me on this please!!!!!?
Thank you.
happy coding!
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What SP do you have installed on your machine? SP3 or later are secured aginst the worm so they don't need the update you want to install.
André
'A programmer is just a tool which converts caffeine into code'
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