|
It is a float type conversion problem. Try using a wider data type. (use decimal with appropriate parameters)
|
|
|
|
|
|
if application use sqlapi to connect(remotely) to mysql/sql server at startup, then while application is running if mysql/sql service is restarted then connection will lost(execute() function of sqlapi says connection is lost).
But isconnected() and isalive() functions of SAConnection class in
sqlapi tells connection is not
lost. then how to know if connection is lost by which function?
|
|
|
|
|
Hi All
I am working on a vb 6.0 + MySQL project.
I need to create a Database(for local use Ex:- If user wants to create database they can create and dump data from online databas) Dynamically and restore the database with production database backup.
Is it possible?
Thanks,
Willington D
|
|
|
|
|
You are also cross posting.
Bad enough you want to use a dead platform to build on, now you want to cross post as well. Will you please move into the 21 century and use VB.net - it's FREE and you'll get much more support from the forums.
Never underestimate the power of human stupidity
RAH
|
|
|
|
|
Yes it is possible. Use the ODBC driver for VB6 via a DSN and issue commands through ADO. Look-up the syntax on the MySQL website for CREATE DATABASE databaseName and associated admin functions.
|
|
|
|
|
how to get number of tables in MS access
|
|
|
|
|
Use the following in the Query Sql design view.
SELECT MSysObjects.Name
FROM MSysObjects
WHERE (((MSysObjects.Flags)=0) AND ((MSysObjects.Type)=1))
ORDER BY MSysObjects.Name;
"Don't worry if it doesn't work right. If everything did, you'd be out of a job." (Mosher's Law of Software Engineering)
|
|
|
|
|
Hi
i have some tables in my database like this :
Table1
Table2
Table3
each record of each table can have one or more images, hence i need a Table to hold only images and parentId field, but my problem is that how can i create a one table to hold images of all tables and have relationShips with other tables ?
what's your idea ?
Note :
1. In webSite db i use sql server, but in client db, i use Access 2007, hence i can't use trigger.
2. I don't want to search tablles, because it's performance is very slow.
3. i can't merge tables because table structures is different.
Thanks
|
|
|
|
|
New table fields are
TableName
IDValue
Image
Problem is you cannot set up relationships, you can NEVER setup relationships when you move the structure into your data.
Never underestimate the power of human stupidity
RAH
|
|
|
|
|
hi guys....
i have this table
ID_____NAME______OTHER_____
1_____Name 1__First value
2_____Name 2__Second value
3_____Name 2__Second value
4_____Name 2__Second value
5_____Name 2__Second value
6_____Name 3__Third value
7_____Name 3__Third value
8_____Name 4__Fourth value
i need to make SQL query wich will eliminate all duplicates from table (all fields are comparing, except id) but one.
for example, after query is executed table should look like this:
ID_____NAME______OTHER_____
1_____Name 1__First value
2_____Name 2__Second value
6_____Name 3__Third value
8_____Name 4__Fourth value
any help appreciated...
|
|
|
|
|
Are you using Microsoft SQL Server?
If yes, you could use the following query (you have to adopt it to your db):
;WITH MyTable_CTE(Name, Ranking)
AS
(
SELECT Name,Ranking = DENSE_RANK() OVER (PARTITION BY Name ORDER BY NEWID() ASC)
FROM MyTable
)
DELETE FROM MyTable_CTE
WHERE Ranking > 1
Hope this helps
Regards
Sebastian
|
|
|
|
|
I have this code written in PERl to connect to a MS-Access-2007 DB .
But my output does not print any of the contents. Could anybody figure this out?
use Win32::ODBC;<br />
$DB=new Win32::ODBC("perlDSN");<br />
if($DB->Sql("select no,cname from tab1"))<br />
{<br />
printf("Error reading\n");<br />
exit;<br />
}<br />
while ($DB->FetchRow())<br />
{<br />
($a,$b)=$DB->data();<br />
print("We have $a\n");<br />
}
|
|
|
|
|
hello every one
i m having error of converting datatype varchar to numeric while inserting
my query is
insert into des_mast (des_name,des_numb,des_recno.....)values('"me.textbox1.text"','"+me.combobox1.text+"','"+me.textbox2.text+"'.....)
and so on there are around 20 such fields in data base and all these fields like des_name,des_numb are set to allow null property.
now if i insert each and every values of textboxes and comboboxes at runtime there is no error of such type and query runs perfectly
but if i keep some textboxes or comboboxes with blank text this error is seen...
"Error converting data type varchar to numeric."
so please suggest what shall i do..
thank you in advance..
Smile Smile Smile
|
|
|
|
|
You are trying to convert and empty string '' to a numeric value, this cannot be done. I suggest you default the value of numeric textboxes to '0'
Never underestimate the power of human stupidity
RAH
|
|
|
|
|
hi
u suggested to place default value of textboxes to '0'
but there are many such textboxes where there values are in nvarchar()
so if i place values to '0' it will create problem
and on this there are such around 30-35 such textboxes and comboboxes placed
i tried something like
insert into des_mast(pincode)values('"+ctype(me.txtpincode.text,integer)+"') there are such columns round about 30-35 in database this is just an example
but it too showed error message like:-"Conversion from string "','" to type 'Double' is not valid."
so please suggest some another way.
|
|
|
|
|
You have little choice in the matter, you need to give the database the correct datatype otherwise you are going to get an error!
Either manage your data or quit, there are many ways and places to set the default values, textboxes, method that reads the textboxes, stored proc that processes the data etc.
It's all about designing your application, currently you have a crappy design, you need to fix it. You know the cause of the problem it's your data so fix it!
Never underestimate the power of human stupidity
RAH
|
|
|
|
|
As Mycroft says
I think the problem is when you try to insert "" in a numeric column, "" is not NULL
Besides, take care of sql injections, since you are concatenating strings
You shouls use sqlparameters, and there you can set a default value, as well as a condition to set empty string "" to null (At least in asp.net, i havent done it in windows forms, but it must be posible)
Alexei Rodriguez
|
|
|
|
|
Hi there.
I have the following stored procedure:
/**********************************************/
CREATE PROCEDURE sp_iet_ComplaintReport
@StartDate DATETIME,
@EndDate DATETIME
AS
select
co.ComplaintID,
pli.Description AS RegardingDD,
co.DateRaised,
c._accCustomercode,
rtrim(c.firstnames) + ', ' + rtrim(c.lastnames) as Name,
CASE
WHEN co.BeenRead = 0 THEN 'Open'
WHEN co.BeenRead = 1 THEN 'Completed'
END AS Status,
rtrim(u.fullname) as handler
from
complaint co
inner join
contact c on
co.contactid = c.contactid
inner join
adm_picklistitem pli on
co.regardingdd = pli.localcode and
pli.picklistname = 'complaintlist'
left outer join
adm_user u on
co.handler = u.userid
where
co.dateraised >= @startdate and co.dateraised <= @enddate
GO
/*********************************************/
This works fine but i want to be able to pass @Handler and map that to the complaint.Handler field. The thing that i want is if i pass NULL to the @Handler then it should bring back all Complaint.Handlers but if you pass an actual value to @Handler then this should bring back a matching value (if it exists).
Sorry if I have worded poorly.
Any help would be greatly appreciated.
|
|
|
|
|
In your where clause try the following
Where (Isnull(@Handler,'') = '') or Handler = @Handler
If the test for @handler = '' then no filter is applied, if @handler has a value then the filter is used.
Caveat - many of these in a single query can reduce performance!
Never underestimate the power of human stupidity
RAH
|
|
|
|
|
the problem that my code does the update during the same run while iam out and run again i find nothing of the updates i think it's a comminting problem anyway hope anyone help me!!
plz check the code:
public partial class Form1 : Form
{
static SqlCeConnection _connection = null;
public static SqlCeConnection Connection
{
get
{
if (_connection == null)
{
_connection = new SqlCeConnection(ConnectionString);
_connection.Open();
}
return _connection;
}
}
public Form1()
{
InitializeComponent();
}
public static DataSet ds = new DataSet();
public static int rowindex = -1;
private void menuExit_Click(object sender, EventArgs e)
{
Close();
}
#region File & Database Details
static string CurrentFolder
{
get { return Path.GetDirectoryName(Assembly.GetExecutingAssembly().GetName().CodeBase); }
}
const string _databaseLocalFileName = "DB1.sdf";
static string DatabasePathName
{
get { return Path.Combine(CurrentFolder, _databaseLocalFileName); }
}
const string _baseConnectionString = "Data Source =";
static string ConnectionString
{
get { return _baseConnectionString + DatabasePathName; }
}
#endregion
private void menuedit_Click(object sender, EventArgs e)
{
rowindex = dataGrid1.CurrentRowIndex;
if (dataGrid1.DataSource != null)
{
panel1.Visible = true;
txtcol1.Text = ds.Tables[0].Rows[rowindex].ItemArray[0].ToString();
txtcol2.Text = ds.Tables[0].Rows[rowindex].ItemArray[1].ToString();
txttblID.Text = ds.Tables[0].Rows[rowindex].ItemArray[2].ToString();
}
else
MessageBox.Show("should load data grid first", "error", MessageBoxButtons.OK, MessageBoxIcon.Hand, MessageBoxDefaultButton.Button1);
}
public static SqlCeDataAdapter adap;
private void btnsave_Click_1(object sender, EventArgs e)
{
try
{
SqlCeCommand cmdUpdate = Connection.CreateCommand();
SqlCeTransaction se = Connection.BeginTransaction();
cmdUpdate.CommandType = CommandType.Text;
cmdUpdate.CommandText = "UPDATE tbl SET Col1=@Col1, Col2=@Col2 where tblID = @tblID";
cmdUpdate.Parameters.AddWithValue("@Col1", txtcol1.Text);
cmdUpdate.Parameters.AddWithValue("@Col2", txtcol2.Text);
cmdUpdate.Parameters.AddWithValue("@tblID", txttblID.Text);
if (Connection.State != ConnectionState.Open)
{
Connection.Open();
}
cmdUpdate.Transaction = se;
cmdUpdate.ExecuteScalar();
se.Commit(CommitMode.Immediate);
Connection.Close();
panel1.Visible = false;
menuItem1_Click(null, null);
}
catch (SqlCeException ex)
{
throw ex;
}
}
private void menuLoad_Click(object sender, EventArgs e)
{
try
{
SqlCeCommand com = new SqlCeCommand("Select * from Tbl ", Connection);
adap = new SqlCeDataAdapter(com);
if (ds.Tables.Count > 0)
{
ds.Tables["tbl"].Clear();
}
adap.Fill(ds, "tbl");
dataGrid1.DataSource = ds.Tables[0];
adap.Dispose();
}
catch (SqlException ex)
{
MessageBox.Show(ex.Message);
}
}
}
|
|
|
|
|
hello
I'm using "OPEN-FOR", not "EXECUTE IMMEDIATE" because I want to do multi rows query. However, "OPEN-FOR" won't take a variable "strSQL" in its FOR clause, it only takes fixed strings?
create or replace function fnEnumSystemUser
(
LogonFilter nvarchar2,
...
AdditionalWhereClause nvarchar2,
OrderByClause nvarchar2
)
RETURN xxxxx.cursorType
AS
strSQL nvarchar2(2000);
FormatAdditionalWhereClause nvarchar2(2000);
FormatOrderByClause nvarchar2(2000);
SystemUserCursor xxxxx.cursorType;
BEGIN
IF AdditionalWhereClause IS NULL THEN
FormatAdditionalWhereClause := ' ';
ELSE
FormatAdditionalWhereClause := TRIM(AdditionalWhereClause);
END IF;
IF OrderByClause IS NULL THEN
FormatOrderByClause := ' ';
ELSE
FormatOrderByClause := TRIM(OrderByClause);
END IF;
strSQL := 'select Id,FirstName,MiddleName,LastName,PrimaryEmail,PersonType,CreateDate,CreatedBy,LastUpdate,LastUpdateBy,Logon,PasswdHash,IsSuspended,ExpiryDate from SystemUser left join Person on SystemUser.PersonId = Person.Id ';
-- This won't work, simply says "Warning: compiled but with compilation errors" when I tried to create function
open SystemUserCursor FOR strSQL;
-- This won't either, on invoke "ORA-01006: bind variable does not exist"
open SystemUserCursor FOR
'select Id,FirstName,MiddleName,LastName,PrimaryEmail,PersonType,CreateDate,CreatedBy,LastUpdate,LastUpdateBy,Logon,PasswdHash,IsSuspended,ExpiryDate from SystemUser left join Person on SystemUser.PersonId = Person.Id WHERE SystemUser.Logon like :x :y ' using LogonFilter, OrderByClause ;
-- This also failed (on invocation, "ORA-00900: invalid SQL statement")
open SystemUserCursor FOR
'select Id,FirstName,MiddleName,LastName,PrimaryEmail,PersonType,CreateDate,CreatedBy,LastUpdate,LastUpdateBy,Logon,PasswdHash,IsSuspended,ExpiryDate from SystemUser left join Person on SystemUser.PersonId = Person.Id WHERE SystemUser.Logon like :x' || OrderByClause using LogonFilter;
RETURN SystemUserCursor ;
END;
This is how I invoked it:
declare
NumItemsSelected int;
lstResult xxxxx.cursorType;
TYPE SystemUserRecordType IS RECORD
(
Id numeric(19,0),
FirstName nvarchar2 (50),
MiddleName nvarchar2 (50),
LastName nvarchar2 (50),
PrimaryEmail nvarchar2 (190),
PersonType int,
CreateDate timestamp,
CreatedBy numeric(19,0),
LastUpdate timestamp,
LastUpdateBy numeric(19,0),
Logon nvarchar2 (75),
PasswdHash int,
IsSuspended char,
ExpiryDate timestamp
);
oUser SystemUserRecordType;
begin
lstResult := fnEnumSystemUser (... '%',... ' Person.PrimaryEmail like ''%a%'', ' order by Logon ASC',0,10,NumItemsSelected);
LOOP
fetch lstResult into oUser;
exit when lstResult%notfound;
dbms_output.put_line('Id: ' || oUser.Id);
END LOOP;
end;
I need ability to append to SQL string because in the end say the least I need to append:
1. ORDER BY clause
2. Call a FUNCTION in WHERE Clause
3. Paging and ROW_NUMBER() clause
What can I do? Thanks!
dev
|
|
|
|
|
Hi,
I would like to know your opinion on which software would be the best RAD around? Actually, I develop in Filemaker, when you are good it's damn fast to develop a solution, but it's quite limited in features.
Is there something similar in the open-source market?
Thank for your idea
|
|
|
|
|
I'm working on a project which will be completely contained on a 1 gig USB drive. I'm trying to determine whether I should use SQL Server CE or some other flavor of SQL. I remember there being some type of SQL that created an SDF file which seemed to be a standalone SQL database. I also remember that one including the ability to encrypt data. So, my questions are:
1) Can SQL Server CE work on a USB stick that's plugged into a computer or is it only for handheld devices?
2) Does SQL Server CE support encryption?
3) What was the version of SQL Server that produced the SDF file?
4) Does that version support encryption?
5) What do I use to create that version?
And finally (whew!)
6) What do you recommend I use and why?
I'd rather stay with SQL Server becuase the database this product will have to sync with is a SQL Server (full) database and I figure a SQL Server flavor will play nicer with it.
Thanks!!!
Denise "Hypermommy" Duggan
|
|
|
|
|
Hi,
I do recall a thread on "SQL Server Compact Edition", if was described as "just a couple of dlls that let you use a single .sdf file as a database. Similar limits to Express (4gig db limit etc) - but it is also missing stored procs."
Hope this helps.
modified on Tuesday, May 5, 2009 3:21 PM
|
|
|
|
|