If myDateTimeColumn contains a <NULL> value. How do you handle that when reading into a DateTime object in your code?DateTime myDate = Convert.ToDateTime(dr["myDateTimeColumn"]);Does not work, it throws: System.InvalidCastException: Object cannot be cast from DBNull to other types.
I am curious as to what others are doing to handle this?
Hi all I am trying to populate a page with data from a SQL DB however one field is null. The problem is this is causing a StrongTypingException and I am not sure how I should handle this to stop the apllication crashing. I am trying to assign a bit value from a SQL Db to checkboxI have tried putting if (Convert.IsDBNull(contentRow.pag_status) == false){//Do what I want}
but this still throws the exception
Can anyone help!?
Hi,
In my Excel file, The Application date column contains empty for some rows. In SSIS I am using one Data Conversion to that Application Date column to change it as Date[dt_Date]. This data conversion is giving error Conversion failed. In Sqlserver table, I declare ApplicationDate column datatype as DateTime.
I want to keep those empty date values as Null in Sqlserver.
I tried the IMEX=1 property still it is not working. How to solve this error?
Thanks in advance.
I have a checkbox on my webform that is bound to a bit field in my SQL table. I'm fine as long as I've got the bit field set to 0 or 1, but if the field is NULL, the checkbox throws an exception during the databind.
Is there any way to handle this without removing the data binding and manually setting the value (ie: some way to intercept it before the exception gets thrown and then setting the field value in the dataset)?
Thanks!
Hi
can somebody explain me how I can assign a NULL value to a datetime type field in the script transformation editor in a data flow task.
In the script hereunder, Row.Datum1_IsNull is true, but still Row.OutputDatum1 will be assigned a value '0001-01-01' which generates an error (not a valid datetime). All alternatives known to me (CDate("") or Convert.ToDateTime("") or Convert.ToDateTime(System.DBNull.Value)) were not successful.
Leaving out the ELSE clause generates following error: Error: Year, Month, and Day parameters describe an un-representable DateTime.
If Not Row.Datum1_IsNull Then
Row.OutputDatum1 = Row.Datum1
Else
Row.OutputDatum1 = CDate(System.Convert.DBNull)
End If
Any help welcome.
Hi,
When I try to insert a new record into a table that has a datetime field that allows nulls, a default 01/01/1900 date is inserted instead of null. I recreated the table and set the datatype to smalldatetime and I still get the error. What have I missed?
Hi
I have a really simple query which i can't figure out why its not working. I have a table called 'ADMIN' which has a datetime field called 'date_edited'. Because the majority of records have never been edited, i have allowed null values and they are filled with 'NULL' in each record. How ever, when i try:
SELECT * FROM ADMIN WHERE date_edited = NULL
I get no records, but i can see and know i have hundreds! I know i'm doing somthing really stupid, but for life of me can't figure it out! :eek:
thanks
Are there any function in SQL Server 2005 which can help to calculate the total no. of days and months? Let's said if I provide 2 dates, 28-Feb-2001 and 01-Mar-2004, it can return 36 Months and 2 Days. The concept is like the function months_between in Oracle. Are there any function in SQL Server 2005 can achieve this?
View 3 Replies View RelatedHi,
I'm inserting a datetime values into sql server 2000 from c#
SQL server table details
Table nameate_test
columnname datatype
No int
date_t DateTime
C# coding
SqlConnection connectionToDatabase = new SqlConnection("Data Source=.\SQLEXPRESS;Initial Catalog=testdb;Integrated Security=SSPI");
connectionToDatabase.Open();
DataTable dt1 = new DataTable();
dt1.Columns.Add("no",typeof(System.Int16));
dt1.Columns.Add("date_t", typeof(System.DateTime));
DataRow dr = dt1.NewRow();
dr["no"] = 1;
dr["date_t"] = DateTime.Now;
dt1.Rows.Add(dr);
for(int i=0;i<dt1.Rows.Count;i++)
{
string str=dt1.Rows["no"].ToString();
DateTime dt=(DateTime)dt1.Rows["date_t"];
string insertQuery = "insert into date_test values(" + str + ",'" + dt + "')";
SqlCommand cmd = new SqlCommand(insertQuery, connectionToDatabase);
cmd.ExecuteNonQuery();
MessageBox.Show("saved");
}
When I run the above code, data is inserted into the table
The value in the date_t column is 2007-07-09 22:10:11 000.The milliseconds value is always 000 only.I need the millisecond values also in date_t column.
Is there any conversion needed for millisecond values?
thanks,
Mani
I have a pivot transform that pivots a batch type. After the pivot, each batch type has its own row with null values for the other batch types that were pivoted. I want to group two fields and max() the remaining batch types so that the multiple rows are displayed on one row. I tried using the aggregate transform, but since the batch type field is a string, the max() function fails in the package. Is there another transform or can I use the aggragate transform another way so that the max() will work on a string?
-- Ryan
how to handle space between multi-value parameter values in SSRS. For e.g. if the values are as follows -'KLO LUG', 'HGY KIU', 'LOT JUY', I know I can use the split function for the commas but its the space between the value which is the problem.
View 3 Replies View RelatedI already asked this question; however, I am giving all the detailsnow:We get large files(millions of records) and we need to load it into ourtables using import export wizard. Some of the fields in the file canbe Null and so we are forced to create table with fields that allowNulls with default ''. However when we insert data into these tablesit puts Null in those fields even though we have a default '' (I do notthink we have any work around for that; do we?)Finally we need to go through each field and update it to '' if it is aNull and that takes LOT OF TIME.If (select count (*) from <tablename> where <columname> is Null) >0BeginUpdate <tablename>set <columnName> = ''where <columnName> is NullendPlease let me know if there are any work arounds for this crisis ?Thank you very much in advance!
View 1 Replies View RelatedMy way:
add column (boolean) to speicify whether is null or not in drived column component, i feel that's a little difficult
any better ideas? thanks
Using asp.net 2.0 and visual studio 2005. The question is regarding the following ER diagram: I've made Firstname, lastname, buildingID and RoomNum all required fields. I've got a modified GridView that displays all of the table Faculty columns. It's been modified so the BuildingID and DepID are resolved to their actual field names and displayed in a DropDownList. In the dropdown list I used for inserting (a seperate DetailsView control), I manually inserted an item into the Department dropdownlist which had the text "-- Select a Department --" with a value of -1. MS SQL didn't like that -1 value so I wrote the following code to fix it: protected void dsFaculty_Inserting(object sender, SqlDataSourceCommandEventArgs e)
{
if (e.Command.Parameters["@DeptID"].Value.ToString() == "-1")
{
e.Command.Parameters["@DeptID"].Value = null;
}
} That means of course DeptID is null, which is ok. The problem arises is when I try to edit that row in the GridView. I get the an error 'ddlDepartment' has a SelectedValue which is invalid because it does not exist in the list of items.Parameter name: valueIdeally, I'd like to make the dropdown list in the GridView show "-- None --" for the DeptID if it comes across a null value. I already tried playing around with the Command.Parameters in the dsFaculty_Selected function, but it didn't work. Ideas?
Re: SQL Server Reporting Services
I have welders who have active dates and inactive dates, and I need to create an "isactive" column in the report. My formula will be pretty obvious to most of you. However, if the user does not input an inactive date, that means none has been given and therefore the welder is currently active. The problem is that there seems to be no way to check if inactive date is null or not in the formula.
Please help! Thanks!
Hi,
I'm using this source code in order to set the DateTime field of my Sql Server database to null.I am retreiving dates from an excel sheet. If no date is found, then I set my variable myDate to DateTime.MinValue then i test it just before feeding my database.
I have an error saying that 'object' does not contain definition for 'Value'.
In french : Message d'erreur du compilateur: CS0117: 'object' ne contient pas de définition pour 'Value'dbCommand.Parameters["@DateRDV"].Value = System.Data.SqlTypes.SqlDateTime.Null;
The funny thing is that in the class browser i can see the Value property for the class Object...
C#, asp.netstring sqlStmt ; string conString ; SqlConnection cn =null; SqlCommand cmd =null; SqlDateTime sqldatenull ; try{sqlStmt = "insert into Emp (Date) Values (@Date) ";conString = "server=localhost;database=Northwind;uid=sa;pwd=;";cn = new SqlConnection(conString);cmd = new SqlCommand(sqlStmt, cn); cmd.Parameters.Add(new SqlParameter("@Date", SqlDbType.DateTime));sqldatenull = System.Data.SqlTypes.SqlDateTime.Null; if (myDate == DateTime.MinValue) {cmd.Parameters ["@Date"].Value =sqldatenull ;} else{cmd.Parameters["@Date"].Value = myDate;}cn.Open();cmd.ExecuteNonQuery();Label1.Text = "Record Inserted Succesfully";}catch (Exception ex){Label1.Text = ex.Message;}finally{cn.Close();}
I have a web application. In some instances, I have a need to send guid parameter as null while making a sql query to SQL 2005. My question is as how to handle this null guid on .net and sql side.
Thanks! in advance.
How to replace DateTime field with null value in SQL 2005 server
I create a stored procedure aa, It works well, but sometimes I hope to replace CreateDate field with null value,I don't know how to doIt seems that datetime type is not null value
create aa @CreateDate DatetimeAsUpdate cw set CreateDate=@CreateDate
I'm importing data form an Excel file to a Sql Server Database. Some of the data imported represents time as a double type so i convert the times into DateTime to be inserted into the database. The time values that aren't available in the Excel file are 0.. so what i want to do is insert null into the database for all the values that are 0 in the excel file... How do i do that based on this code i have so far:protected void ButtonImport_Click(object sender, EventArgs e){PanelUpload.Visible = false;PanelView.Visible = false;PanelImport.Visible = true;LabelImport.Text = "";OleDbCommand objCommand = new OleDbCommand();objCommand = ExcelConnection(); OleDbDataReader reader;reader = objCommand.ExecuteReader(); while (reader.Read()){DateTime? in_1 = null;DateTime? out_1 = null;DateTime? in_2 = null;DateTime? out_2 = null; int emp_id = Convert.ToInt32(reader["emp_id"]);DateTime date_entry = Convert.ToDateTime(reader["date_entry"]);if (Convert.ToDouble(reader["in_1"]) != 0)in_1 = ConvertDoubleToDateTime((double)reader["in_1"]);if (Convert.ToDouble(reader["out_1"]) != 0)out_1 = ConvertDoubleToDateTime((double)reader["out_1"]);if (Convert.ToDouble(reader["in_2"]) != 0)in_2 = ConvertDoubleToDateTime((double)reader["in_2"]);if (Convert.ToDouble(reader["out_2"]) != 0)out_2 = ConvertDoubleToDateTime((double)reader["out_2"]); ImportIntoAttendance(emp_id, date_entry, in_1, out_1, in_2, out_2);} reader.Close();}protected void ImportIntoAttendance(int emp_id, DateTime date_entry, DateTime? in_1, DateTime? out_1, DateTime? in_2, DateTime? out_2){ SqlDataSource AttendanceDataSource = new SqlDataSource();AttendanceDataSource.ConnectionString = ConfigurationManager.ConnectionStrings["SalariesConnectionString1"].ToString();AttendanceDataSource.InsertCommandType = SqlDataSourceCommandType.Text;AttendanceDataSource.InsertCommand = "INSERT INTO Attendance (emp_id, date_entry, in_1, out_1, in_2, out_2) " +"VALUES ('" + emp_id + "', '" + date_entry + "', '" + in_1 + "', '" + out_1 + "', " +"'" + in_2 + "', '" + out_2 + "')"; int rowsAffected = 0;try{rowsAffected = AttendanceDataSource.Insert();}catch(Exception ex){LabelImport.Text += "<font color=red>" + ex + "</font><br />";} }private DateTime ConvertDoubleToDateTime(double dbTime){string[] SplitTime = dbTime.ToString().Split('.');string hours = SplitTime[0];string minutes = String.Empty;string time = String.Empty; if (dbTime.ToString().IndexOf('.') != -1){if (SplitTime[1].Length >= 1){if (SplitTime[1].Length == 1)minutes = Convert.ToString(Convert.ToDouble(SplitTime[1]) * 10);else if (SplitTime[1].Length > 1)minutes = SplitTime[1];}}elseminutes = "00";time = hours + ":" + minutes;return Convert.ToDateTime(time);}
View 3 Replies View RelatedFollowing SQL Statement is from BOL 7.0 and it doesn't return any data. But when I change the where clause to "WHERE advance IS NULL" it works. I am trying to do something like this in my own stored procedure. It works fine in 6.5 both ways. Is there any parameter to set? or any other problem. Thanks in advance.
SELECT title_id, type, advance
FROM pubs.dbo.titles
WHERE advance = NULL
Hi
I am importing an excel spreadsheet into tables in a sql server database using dts. I have one row of information filled out in the excel spreadsheet, but when the dts runs, it imports the information plus 5 extra rows filled with nulls ino the table.
Does anyone know how to fix this?
Thanks
Hello, i´m inserting values in a table defined as above,
/********
create table SERVICE_TYPE (
PK_TYPE numeric(8) not null IDENTITY,
TYPE nvarchar(32) not null unique,
DESCRIPTION nvarchar(256) null default(''),
USER_VISIBLE numeric(1)not null,
constraint PK_SERVICE_TYPE primary key (PK_TYPE)
)
go
**********/
these values are inserted throug ODBC with VC++,
in the case of the DESCRIPTION Column, i´m sending null strings CString(""). this value will be filled after.
What happens is that, when i query the database to show the records in this table, the database shows, for example:
PK_TYPE TYPE DESCRIPTION USER_VISIBLE
--------- ------ ------------------- -------------
1 1 (null) 1
i dont want to show the "(null)" value in the column DESCRIPTION, but a null string like ""
can anyone help me , thanks
Cristovão
I have two tables, a dates table and a values table. They are joined on the date column.The date table has a range, say from today as far as 20 days from now, incrementing by 1 day each row.The values table may have a row for a day, and may not. If the day has a value I want to display that value.If the day does not have a value in the values table I want to display the last known value.
I think this can be done with windowing functions in a set based manner but have not been able to work it out. I have done it procedurally but im not happy with that at all, and really want to see if this is possible in a set based manner.Below is some simplified code to allow testing with sample data.
create table DimDate
(
DateCol date
)
create table TotalsData
(
DateCol date
[code]....
The following t-sql 2012 works fine in sql management studio. However when I place it in a .net 2010 web form application, I am told the sql does not work when the parameter values are null. Thus can you tell me what I can change in the sql below that will accept null as 3 possible input values?
SELECT i.[lastName]
,i.[firstName]
,i.[middleName]
,i.[suffix]
,a.[userid]
[code]...
CREATE TABLE A (ID INT IDENTITY (1,1))
CREATE TABLE B (ID INT, EMPID VARCHAR(10))
INSERT INTO A DEFAULT VALUES
GO 5
INSERT INTO B VALUES (1,'E23')
INSERT INTO B VALUES (1,'E24')
INSERT INTO B VALUES (2,'E23')
from the above code i would like to get output like
ID EMPID
1 23
2 23
3 null
4 null
5 null
1 24
2 null
3 null
4 null
5 null
I'm trying like
select a.id, b.empid from (
select * from a cross join (
select distinct empid from b) b
) a
left outer join b on a.id = b.id but i get repetitive rows.
Question in review today is Creating a Report showing the FName, LName of all Employees not Specified in a region; I would assume "No Value to be Null" Correct?
Or is there another way for me to do this?
This is what I have so far...What am I missing that this is not showing me results?
Select Firstname, Lastname, Region
From Employees
WHERE Region LIKE 'null%';
Q1. Model Prediction -- Suppose we already have a trained Microsoft Linear Regression Mining Model, say, target y regressed on two variables:
x1 and x2, where y, x1, x2 are of datatype Float. We try to perform Model Prediction with an Input Table in which some records consist of NULL x2 values. How are the resulting predicted y values calculated?
My guess:
The resulting linear regression formula is in the form:
y = constant + coeff1 * (x1 - avg_x1) + coeff2 * (x2 - avg_x2)
where avg_x1 is the average of x1 in the training set, and avg_x2 is the average of x2 in the training set (Correct?).
I guess that for some variable being NULL in the Input Table, Microsoft Linear Regression just treat it as the average of that variable in the training set.
So for x2 being NULL, the whole term coeff2 * (x2 - avg_x2) just disappear, as it is zero if we substitute x2 with its average value.
Is this correct?
Q2. Model Training -- Using the above example that y regressed on x1 and x2, if we have a train set that, say, consist of 100 records in which
y: no NULL value
x1: no NULL value
x2: 70 records out of 100 records are NULL
Can someone help explain the mathematical procedure or algorithm that produce coeff1 and coeff2?
In particular, how is the information in the "partial records" used in the regression to contribute to coeff1 and the constant, etc ?
Q1. Model Prediction -- Suppose we already have a trained Microsoft Linear Regression Mining Model, say, target y regressed on two variables:
x1 and x2, where y, x1, x2 are of datatype Float. We try to perform Model Prediction with an Input Table in which some records consist of NULL x2 values. How are the resulting predicted y values calculated?
My guess:
The resulting linear regression formula is in the form:
y = constant + coeff1 * (x1 - avg_x1) + coeff2 * (x2 - avg_x2)
where avg_x1 is the average of x1 in the training set, and avg_x2 is the average of x2 in the training set (Correct?).
I guess that for some variable being NULL in the Input Table, Microsoft Linear Regression just treat it as the average of that variable in the training set.
So for x2 being NULL, the whole term coeff2 * (x2 - avg_x2) just disappear, as it is zero if we substitute x2 with its average value.
Is this correct?
Q2. Model Training -- Using the above example that y regressed on x1 and x2, if we have a train set that, say, consist of 100 records in which
y: no NULL value
x1: no NULL value
x2: 70 records out of 100 records are NULL
Can soemone help explain the mathematical procedure or algorithm that produce coeff1 and coeff2?
In particular, how is the information in the "partial records" used in the regression to contribute to coeff1 and the constant, etc ?
Hello,I am trying to import a CSV file into my SQL Server database, this file was originally generated by another database table (on another server) with the same structure, the table contains two columns of real datatype with Allow Null Value setto true for those columns, the CSV file contains the value NULL for theses columns, I am facing a problem when importing this file. This may be because DTS tries to represent values as strings then to convert them to real datatype which results in transforming the value "NULL" to real, I receive an error message saying.Error during Transformation 'DirectCopyXform' for Row number 1. Errors encountered so far in this task: 1.
TransformCopy 'DirectCopyXform' conversion error: Conversion invalid for datatypes on column pair 8 (source column 'Col008' (DBTYPE_STR), destination column 'zip_longitude' (DBTYPE_R4)).
TransformCopy 'DirectCopyXform' conversion error: Conversion invalid for datatypes on column pair 7 (source column 'Col007' (DBTYPE_STR), destination column 'zip_latitude' (DBTYPE_R4)).How can I work around this problem? Any help would be appreciable
I am stuck on a query where I need to display all the month year values even if the corresponding count_booking values are NULL. The requirement is to display the 13 month year period from current date.
For e.g. if the date exists in the current month then starting from May 15 go all the way back to Apr 14.
My current query works in terms of displaying all the 13 months if the count_booking values exist for all the months. However, if some months are missing the values then those months don't show up.how to display all the months even if the values are NULL ? Query below:
SELECT COUNT(m.BOOKING_ID) AS count_booking, LEFT(DATENAME(MONTH, m.CREATE_DT), 3) + ' ' + RIGHT('00' + CAST(YEAR(m.CREATE_DT) AS VARCHAR), 2)
AS month_name
FROM MG_BOOKING AS m
WHERE (m.CREATE_DT >= DATEADD(m, - 13, GETDATE()))
[code]...
Everytime I try to open up SSMS, I get this error:
"Values cannot be null. Parameter Name: ViewInfo"
When I press ok to login, It doesn't show me the database and system dbs aren't expandable.
I have a DTSX package which reads values from a fixed-length text file using a data reader and writes some of the column values from the file to an Oracle table. We have used this DTSX several times without incident but recently the process started inserting NULL values for some of the columns when there was a valid value in the source file. If we extract some of the rows from the source file into a smaller file (i.e 10 rows which incorrectly returned NULLs) and run them through the same package they write the correct values to the table, but running the complete file again results in the NULL values error. As well, if we rerun the same file multiple times the incidence of NULL values varies slightly and does not always seem to impact the same rows. I tried outputting data to a log file to see if I can determine what happens and no error messages are returned but it seems to be the case that the NULL values occur after pulling in the data via a Data Reader. Has anyone seen anything like this before or does anyone have a suggestion on how to try and get some additional debugging information around this error?
View 12 Replies View Related I wrote a select statement, I only want to see orders with max lastUpdatedOn date of 14 days and older. Now my results show dates with all orders of 14 days and older (which is OK), but all others are displayed in the "Uitgifte" column as "NULL". But those orders should not be displayed at all.
selectdistinct ProductionHeader.ProdHeaderOrdNr,
ProductionHeader.PartCode,
ProductionHeader.Description,
ProductionHeader.Qty,
(select max (ProdStatusLog.ProdStatusCode)
[code]...