Does it make a difference in terms of the actual size of the database if I define one of the columns as nvarchar(100)? If there are restrictions on the form as for how much you can input, let's say 50 characters, does the db save blank spaces from character 51-100 and create a database that is larger than it would be it the column was defined as nvarchar(50)?
I would like to know, how to set up the Entity framework to create a nvarchar(50) insted of a nvarchar(4000), when creating a string? by the way I am not using the designer!
when i am trying to uedit my recods in gridview this error is coming. I am using SQLDatasource with gridview and for edit purpose i am using stored procedure. I have manually executed the SP and its woring fine. my SP is here
I get this error when I am trying to concatenate the two fields in bold into one field for a datagrid.
select count(cp.iOwnerID) as enrolled,(duration + '' + duration_interval) AS Duration ,session_id,school_id as SchoolId,program_id as ProgramId,convert(nvarchar(10),session_start_date,101) as SessionStartDate, session_class_size as SessionClassSize from dbo.cnSchoolProgramSessions cn with (nolock) left join customerproduct cp on convert(datetime,convert(nvarchar(10),session_start_date,101)) = convert(datetime,convert(nvarchar(10),cp.dtPurchasedate,101)) where record_status = 1 and school_id = '" & iSchool & "' and program_id = '" & iProgram & "' and (CP.chProductNumber = '" & Me.Label5.Text & "' or CP.chProductNumber IS NULL) group by session_id, school_id, program_id,session_start_date,session_class_size,duration,duration_interval
I've been struggling all day trying to make this work, but I'm just not having any luck. I have 2 tables, 1 is a lookup table and the other is a user table. The lookup table stores the State values in text form, where the user table stores the ID of the State for the particular user. I'm trying to create a editable grid view that allows the user to update their State based on values in the lookup table. I've created an Edit Template with a drop down for the State field. When the user clicks on "Edit" in the GridView I need to be able to reference the SelectedValue of the State and write the index of the State to my user profile table. I'm using two different data sources for this since the GridView needs to display each record from the users table and the Edit Template needs to display only values from the Lookup table. I've included my code below.
i want to inser the value in data base ...i am using asp.net in visual studio 2008...i want syntax to insert the datetime,integer ,float,string data type into the data base.
i want to insert the value in sql data base.in table id coloum is unique.because of this i cant able to select not null type....so i cant able to insert the value in data base.
I want access remote server data base for my asp.net application my connectin string is
<add name ="Constr" connectionString="Server=xxx.xxx.xx.xxx,xxxSQLEXPRESS;Database=ABC;Integrated Security=True"/> and Error is
Login failed for user ''. The user is not associated with a trusted SQL Server connection. there is not any user id and password for access data base i already tried Uid=sa;password=sa
On one of our applications we are getting a timeout error on an 'additional details' field in our database, the field type is nVarChar(MAX).
The error seems to be happening when a user enters more than 4000 characters into the additional details field. It is my understanding that this fieldtype can store up to 8gb of data and should be used in stead of the "Text" field type?
We have since limited the user from entering more than 4000 characters via the application, however the DB still contains legacy data - when the 'additional details' with more than 4000 characters is pulled out - "Timeout Error".
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 need to display a single field from an sqlserver table, do I need to use sqlDataSource ect. or is there a simpler way (like msaccess's LookUp) for single values.
My stored procedure requires an input parameter -- @CompanyName -- and has one output parameter - @CompanyID. This is how I always handled stored procedures that did NOT use output parameters. How do I grab the value coming from the output parameter?
I have the following problem: I need to store in MS SQL Server 2005 a vary large text in to one field of type nvarchar(MAX), In spite of the configuration is apparently correct I keep receiving the following message in the exception: "string or binary data would be truncated".
Here is my code, using LinQ to get the data from database.
public IEnumerable categoryData() { db = new DBModelDataContext(); var cat = from c in db.Categories select new { c.categoryname,c.categoryid }; return cat; }
trying to get the values (categoryname and categoryid) into textfiled and valuefield of dropdown list.
dt = new clsData(); ddlCategory.DataSource = dt.categoryData();
what is the code that i need to write to assign the categoryname to textfield and categoryid to valuefield. I mean how to loop through the values coming from the above function.
My admin set innodb_buffer_pool_size=512M, innodb_log_file_size=128M, and innodb_log_buffer_size=1M although in mysql query show global variables its showing what the value is set. When i restart my system also its showing what we set the data.(It means we set log file buffer file size to max and its working fine.) but when i try to upload a file of 58 mb again its throwing error as The size of BLOB/TEXT data inserted in one transaction is greater than 10% of redo log size.
I am having some issues with my base class inheritance. I am currently employing Table per Type Inheritance for the following tables:
Database:
Members Table
- Member ID (PK)
- First Name
- Last Name
- Email
- ...
Students Table
- Member ID (FK)
- Credits
- Notes
- ...
Instructors Table
- Member ID (FK)
- Biography
- Office Hours
- ...
My Entity Data Model defines "Member" as the base class for both Students and Instructors, since members can be both students as well as instructors simultaneously. The problem, however, occurs when I attempt to get a list of Members objects. Because the database contains members who are indeed students AND instructors, the following exception is thrown:
All objects in the EntitySet 'CountyCollegeEntities.BaseMembers' must have unique primary keys. However, an instance of type 'CountyCollege.NET.Administrator' and an instance of type 'CountyCollege.NET.Student' both have the same primary key value, 'EntitySet=BaseMembers;ID=10016'.
I am beginning to think that I made a mistake by building these classes to inherit from Member although it has been ideal up until this point. But before I start ripping up all my existing code to remove this inheritance, I thought I would see if anyone has any tricks that would make this work. Any advice as to either how I can get around this error or a more appropriate way to structure my classes would be very much appreciated.
