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How do you get a vb.net program to send a session kill command to Oracle? I can do it in sqlplusw by just typing:
alter system kill session '45,30665';
In vb.net, I'm trying to do this with an oracle.dataAccess object:
oraConn As New OracleConnection("Data Source=db1;User ID=usr;Password=pw")
oraConn.Open()
Dim cmd As New OracleCommand
cmd.Connection = oraConn
cmd.CommandType = CommandType.Text
cmd.CommandText = "alter system kill session '45,30665';"
cmd.ExecuteNonQuery()
cmd.Dispose()
When it gets to the ExecuteNonQuery line, it throws an exception "ORA-00911: invalid character". I think it's expecting an SQL statement. I'm using VB Express 2008.
You don't want semicolons in statements that you're sending from a client. Get rid of the semicolon at the end of the alter system
cmd.CommandText = "alter system kill session '45,30665'"
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I have to create a list box control that contains all of the queries except for the system queries. Recall that system query names begin with the ~ character.
When I try to write SQL code in the row source (in the property sheet) for my frmQueries form I keep getting an error saying:
Syntax error (missing operator) in query expression:'[Type]=5 And Left([Name],1)<>"~" OORDER BY [Name]'
The code I entered is:
SELECT [Name] FROM MYSysObjects
WHERE [Type]=5 And Left([Name],1)<>"~"
OORDER BY [Name];
I am not sure why I am getting this error or how I can fix it.
OORDER should be ORDER, MYSysObjects should (presumably) be MSysObjects, and you can also replace Left([Name],1)<>"~" with [Name] not like "~*" (assuming MS Access instead of SQL Server).
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Closed 4 years ago.
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Hello everybody hope you are well.
I have a place on a project im working on that im struggling to get past. I'm basically gathering meta data of a song and assigning them to variables in VB.
I'm next trying to save this data to a SQL database with tables i have created in visual studio and im having trouble doing this. The problem lies within trying to link the VB variables into a SQL query. Any Ideas?
To link VB variables to an SQL query, you need to add parameters that store the variables and then use those parameters in your SQL command:
Using parameters
MyCommand = New SqlCommand("SELECT Height, Weight, DoB, Gender, FROM `User` WHERE Username = #Username", DatabaseConnection)
MyCommand.Parameters.AddWithValue("#Username", Username)
UPDATE: How to connect to database
'Leads to the database
Public Filename As String = $"{AppDomain.CurrentDomain.BaseDirectory}YourDatabase.accdb"
'The connection string is set
Public ConStr As String = $"PROVIDER=Microsoft.ACE.OLEDB.12.0;DATA Source = {Filename}"
'The connection to the database is defined
Public DatabaseConnection As OleDb.OleDbConnection = New OleDb.OleDbConnection(ConStr)
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I'm trying to run an SQL SELECT statement which is running correctly in SQL Server Management Studio, but I keep receiving the error while trying to run the below code in Visual Basic/Studio:
In correct syntax near the word 'ON'
Code:
com = New SqlCommand("SELECT Member_Details.mMember_ID AS 'Unique ID', Member_Details.mFirst_Name + Member_Details.mLast_Name AS 'Name', CONVERT(varchar(10),Member_Details.mDoB,103) AS 'Date of Birth', Member_Details.mGender AS 'Gender', Rep_Group.rRep_Group_Name AS 'Rep Group'" & _
"FROM Member_Details" & _
"Join(Rep_Group) ON Member_Details.mRep_Group=Rep_Group.rRep_Group_ID", con)
The error message:
A first chance exception of type 'System.Data.SqlClient.SqlException' occurred in System.Data.dll
Additional information: Incorrect syntax near the keyword 'ON'.
The SQL Statement does work without the Join statement, so I think I'm just formatting it wrong in Visual Studio.
Replace Join(Rep_Group) with Join Rep_Group in your code. JOIN is not a function :)
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I have an access database that I am attempting to reference a SQL query
Set dba = CurrentDb
SQL = "SELECT * FROM tbl_NewHireStep WHERE Location = '" & Site & "' AND E-Verified = TRUE "
Set rst = dba.OpenRecordset(SQL, dbOpenDynaset, dbSeeChanges)
Keeps giving me a Too few parameters error. In SQL it works great. What am I doing wrong?
The hyphen, -, is an Access reserved symbol. If you want to use it in a field or table name, then you must always put that field or table name inside square brackets when you reference it. For example,
SQL = " SELECT * FROM tbl_NewHireStep " & _
" WHERE Location = '" & Site & "' AND [E-Verified] = TRUE "
It's far better to avoid using reserved words and symbols in the first place. Several years ago, Allen Browne compiled a list of Problem names and reserved words in Access. I'm not sure how current the list is, but it is a great reference when creating new database schemas.
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this is my code
sqlcommand=new sqlcommand("inset into table values('"+home.name'"+,'"+home.DOJ'")",con);
You're using the local default string conversion from DateTime (I assume) to string, and then hoping that's valid for SQL.
Additionally, your code has a SQL injection attack vulnerability.
Both of these can be fixed - and your code readability - can be improved using parameterized SQL:
using (var command = new SqlCommand(
"INSERT INTO Foo (Name, DOJ) Values (#Name, #DOJ)", connection))
{
command.Parameters.Add("#Name", SqlDbType.VarChar).Value = home.name;
command.Parameters.Add("#DOJ", SqlDbType.DateTime).Value = home.DOJ;
...
}
(Adjust the types accordingly, e.g. using SqlDbType.NVarChar and SqlDbType.DateTime2.)
Never put values directly into SQL like you were doing. Using parameterized SQL is a win all round.