DataSource Controls :: Using Cast And Sum On VarChar Column?
Sep 29, 2010
I have a little problem developing a SQL Select Statement on a column that is formatted pretty badly. Firstly, the Database has already been created and filled with Data in a Test Environment, I'm not sure if the format is the same or has been updated in Production but since I'm only able to work with the Test Environment right now I'm stuck with using what I have. The Column in one Table shows a Snapshot of a clients account which is set to VarChar(50) but the actual data in the column is formatted like a money format (with a $ and decimal point so for example "$5,000.00" would be an entry in one Row).
What I'm trying to do is a create a WebService that will be used in a iPhone Application and one of the Methods needs to just give a quick display of the total value of all Clients with each specific company but I can't perform a SUM function on a VarChar column and I've tried to CAST and CONVERT the column into money, int, decimal and just about every format I can think of but I keep getting an error stating that I convert the data type varchar to which ever one I'm trying. I think it has something to do with the $ already listed in the Column, so I wanted to know what I could do to either remove the $ sign (like a Trim option) or if there is a better way of doing this that I can't think of. I know the best option would be to convert the column to the appropriate format but as I said, this was a previously designed system and I'm not sure if the Production area is the same (most likely not).
I have a grid view with manual sorting. In some cells, the data are numeric and datetime. But due to some constrains, the data type on tables are varchar. The problem here is when I sorting those numeric data, it is treated as varchar.Eg: 1, 12, 13, 2, 23, 3, ...But I wanted the order to be: 1, 2, 3, 12, 13, 23, ...I have tried these method, but it doesnt works.
Im developing a web application in asp.net where i have gridview with some text box controls in it.In runtime we are creating a new row dynamically by clicking add button .To insert data into the database.i used a stringbuilder instead of string becoz the data what i have to insert into database is more.but i am gettin the following error No mapping exists from object type System.Text.StringBuilder to a known managed provider native type. in database the datafield column datatype is varchar(max).
i want to convert all my database columns whose data type is char,varchar, nchar to nvarchar datatype. But the main problem is that some of my primary key, foreign key columns are also of varchar datatype. So when i try to change their datatypes to nvarchar then i receive the errors related to constraints of Primary Key, Unique Key and indexes. how to change the datatypes to nvarchar after droping the constraints and after changing all constraints will apply again. I also want that no data loss will occur.
I save dates as a string in a varchar data field named "TilDato" in a SQLServer-express table. I want to filter the records smaller than a specific date from a variable in the script. I try the following statement, but it does not seems function logically.
objCmd = new SqlCommand("SELECT * FROM Reservering WHERE @laanedato<=TilDato",myConn2); objCmd.Parameters.Add("@laanedato", laanedato); objRdr = objCmd.ExecuteReader();
I need to sort this list by descending order treated as actual date. I tried converting it to date and then tried to extract the year and month out but I keep receiving conversion errors. Does anyone know how to get this in the descending order to it shows up like this:
Not sure if this should be in SQL or .NET but as I'm doing this in asp.net I figured here..I'm trying to insert '00' into a varchar column of my database, when I do this its actually in the database as '0'... if I do '05' or '15' or '30' then its fine.
just needing a 2nd set of eyes looking at this to make sure the error isn't something else other than my LINQ code here. Here's the function class itself:
For some reason it's flagging the 2nd line in the GetJacketByPolicyID function saying the specified cast is not valid. So I'm guessing it's something I'm doing wrong. I'm sure the tblPolicy/tblPolicies class works right since I can create a new instance of a tblPolicy and set a few variables by hand and return it, so that's not it. I've also checked the datarow I'm fetching and there's no null values in the record, so that shouldn't be it either.
error: The conversion of the varchar value '0000033878000010001' overflowed an int column. Maximum integer value exceeded.I am trying to call ('0000033878000010001')this value from stored procedure.I pass 3 parameters and it should generate this value and insert it in one table.I am able to do this with (000010001) this part of the value.ut i also need constant(0000033878) value append to the above codeif i try to do so i am getting("The conversion of the varchar value '0000033878000010001' overflowed an int column. Maximum integer value exceeded." )this error at this
comparing integer values which are actually in string (varchar(9)) right now...I'm trying to do the following in a stored procedure..
SET @MinProjectYear = SELECT ProjYear FROM P_A WHERE ID = @ID SET @MaxProjectYear = SELECT ProjYear FROM P_A WHERE UserId = @UserID AND... IF EXISTS(SELECT 1 FROM P_A WHERE MinProjectYear <= MaxProjectYear) return true
The MinProjectYear and MaxProjectYear are varchar(9) values stored as "2007-2008", "2009-2010", etc. How do I split and compare the years?? i.e. check if 2007-2008 <= 2009-2010 ??
I have a webpage, i have a usercontrol in it , its name ispersonal1, i have tow Radiobutton in this usercontrol, the id of one of them ismale and the other one is female, it is obviously that each time we fill one of these radiobuttons and the other one will be null,in my database the type of these fields are bit , and they have allow null, i defined a property for my usercontrol like this:
I wanted to delete the record from data but I receive this error "Unable to cast object of type 'System.Data.Linq.DataQuery`1[training_eval.Course]' to type 'training_eval.Course'.
Dim eval_sure = From ev In db.Evaluates Where ev.course_id = indexcourse Select ev.course_id Dim del_course = From c In db.Courses Where c.Course_id = indexcourse db.Courses.DeleteOnSubmit(del_course) db.SubmitChanges()