I try to create one CONSTRAINT in Sql Server 2008 which checked that:
if Frecuencia = 0 then EsPar <> null
I try to do this:
ALTER TABLE [IngresoxConsorcio] WITH NOCHECK
ADD CONSTRAINT CheckBimestral
CHECK(Frecuencia = 2 AND EsPar <> null)
But obviously don't works
I have a table with three fields, User, City and Country, where exactly one of the fields must be non-NULL at all times. Can I use an SQL constraint for this or should I rethink what I'm doing?
The scenario is that my database should contain documents that can be attached to users, cities or countries. So a row in this table contains exactly one document for either a user, a city or a country. However, one should be able to search for all documents as well, regardless of what entity it has been "attached" to.
The reason I'm not using three different tables instead is that I want to avoid having to JOIN the three tables when searching for documents in all of the three places. I'm imagining that the kind of denormalization I'm attempting to use here will improve performance.
Sql constraint to convert empty string to null
View 7 RepliesI want to create a constraint for 3 columns (A B and C) where if columns B or C are not null, then A cannot be null. And vice versa (i.e., if A is not null, then either B cannot be null, or C cannot be null).I am not very well versed in SQL and would like to know what is the best way to achieve this (e.,g Check constraint, stored procedure, function, trigger)? I'm leaning towards trigger but I'm not 100% sure if that's right nor of how to implement it.
View 3 RepliesI have 3 radio buttons op1, op2, op3 working as a group. In the code behind I check to see if a paticular button is checked, then do some processing. The problem is all the buttons return null. Checked in the debugger and all values are null even op1 which value is set to true.
Front end code for the buttons are:
<asp:RadioButton ID="op1" runat="server" AutoPostBack="True" Checked="True"
GroupName="searchOPT" oncheckedchanged="op1_CheckedChanged" />
<asp:RadioButton ID="op2" runat="server" AutoPostBack="True"
GroupName="searchOPT" oncheckedchanged="op2_CheckedChanged" />
<asp:RadioButton ID="op3" runat="server" AutoPostBack="True"
GroupName="searchOPT" oncheckedchanged="op3_CheckedChanged" />
The test in the code behind is:
if (op1.Checked)
{.....do stuff...}
if (op3.Checked)
{.....do stuff...}
if (op3.Checked)
{.....do stuff...}
I'm trying to remove a user from the aspnet_Users table.
[Code]....
I received the following error during my try-catch test:
System.Data.SqlClient.SqlException was caught Message=The DELETE statement conflicted with the REFERENCE constraint "FK_lusHmoob_aspnet_Users". The conflict occurred in database "laujtsov", table
"laujAdmin.lusHmoob", column 'whoInsert'.
The statement has been terminated.
Source=.Net SqlClient Data Provider
ErrorCode=-2146232060
[Code].....
i am new to asp.net. i like to learn asp.net and c#. when i try to connect to sql server, it asks server name. i don't know server name and it asks database name also. how to create database and where can i access like phpmyadmin. in phpmyadmin i can create database and tables.
View 9 RepliesThe UPDATE statement conflicted with the FOREIGN KEY constraint "FK__Software__Packag__5165187F". The conflict occurred in database "StudentDB", table "dbo.Package", column 'PackageID'. The statement has been terminated.
what i try to do is run this;
[code]....
let say i have 2 table (PARENT and STUDENT table)
the structure for both table are
STUDENT
PARENT
student_id (PK) parent_id (PK)
student_parent (FK) parent_status (the value is either ACTIVE OR INACTIVE)
- parent_id is refer by STUDENT table as a foreign key
- now i want to inactive the status for parent
- i want my system pop out a message something like "The parent you want to inactive is refer by a student, inactive is not allow"
- is it any constraint in SQL Server 2005 to help me check whether parent it is refer by student table? The concept i want to use is something like delete constraint in SQL Server 2005 mean it is not allow to delete a person who is refer by a student in STUDENT table.
I'd really like to know how to do the same thing in my code as going into sql server management studio, clicking on the design of a table, and then from the file menu scrolling to the relationships and disabling the foreign key constraint by selecting no to the 'enforce foreign key constraint'.
View 2 Repliesi have a bizar situation, i have a SSIS package which imports records from a flatfile.First i get rid of all the double records, so I keep only unique records before I put them into the desired table.I have put a dataviewer on the flow and notice that there are no duplicate records, and though the SSIS package fails with a violoation of a promary key constraint.Hs anyone seen this before? It is really strange.
View 1 RepliesIs it possible to create a MS SQL 2005 database using Visual Studio 2008?
How about using Visual Web Developer 2008 Express Edition?
Is it possible to allow repeated nulls on a column with a unique constraint? This column will won't always be populated with data upon insert, a condition must be met before the value is update. Once updated, it needs to be unique. Do I need to assign a temporary, random value or
View 1 RepliesWhen I get an exception message like this I want an Exception Class name to compare.Not wantto compare a string to match with substring.when I get an unique constraint error like this below how can I control if error exception type is exactly sqlserver unique constraint error ?:
catch (Exception ex)
{ if (ex.class==SQLUniqueException) blahblah();
};
I have a SQL Server 2000 table with 7 columns and would like to add a constraint that prevents a row being added with the same value for both Col2 and Col3.
So, for example, if Col2 = 205 and Col3 = 5, then the constraint should prevent inserting another row with the values for Col2 = 205 and Col3 = 5.
The following is an example of what I would like to prevent:
Col1 Col2 Col3 Col4 Col5 Col6
1 205 5 1 1 1
2 205 5 0 0 0
I have tables:
MAILBOX
MailboxId int PK
MailboxTypeId int FK
MAILBOXTYPES
MailboxTypeId int PK
I can't make relationship between MailboxTypeId in table MAILBOXTYPES and MailboxTypeId in table MAILBOX why ?
I have 2 table Table A, Table B.
Table A - Parent Table
ID - Uniqueidentifier not null(PK)
Table B -Child Table
ID - uniqueidentifier null(FK, TableA)
I have a stored procedure to insert data into Table B, but when I tried to insert a null value into column ID of table B, this error came up:
The INSERT statement conflicted with the FOREIGN KEY constraint "FK_tableB_tableA". The conflict occurred in database "database name", table "table A", column 'ID'.
The statement has been terminated.
The insert statement in asp.net is like so:
sqlcommand.parameter.add(New Sqlparameter("ID", Nothing))
I am guessing adding nothing to the null value column is the problem, but i don't know how to fix it... The INSERT statement conflicted with the FOREIGN KEY constraint "FK_tableB_tableA". The conflict occurred in database "database name", table "table A", column 'ID'.
i am using the following in a stored procedure.
[code]....
[Code]....Handling NULL...Field not updating when NULL?
Would something be missing, not working, or confusing if I do this? First, install SQL Server 2008 Standard, and SP1. Then, install Visual Studio 2010 Professional, unchecking SQL Server 2008 Express option. Or would I need to fix any configurations afterwards?
View 1 Replieshow can i transfer complete database from sql server 2008 to sql server 2008 without loosing relationship intigrity.
View 9 RepliesI have a table that i am trying to create backup through "Generate Script" in sql server 2008. It generates the table script succussfully but when i try to open the script and execute, it throw sql syntax errors on one of the column.
The resson behind is because each row of that column contains an xml file content that contains many tags including <br> and others.....
i have following insert code
Code:
Dim hotel_book As String = "insert into hotelbooking (Userid, hotel_requirement_Types, singleroom, single_no_room,doubleroom,double_no_room,checkin_date,checkout_date) " & _
"VALUES (" & userid & ", '" & ckchecked.Text & "' , " & Convert.ToByte(boolsing) & " ," & Int32.Parse(no_single_room.Text) & "," & Convert.ToByte(booldoub) & "," & Int32.Parse(no_double_room.Text) & " ,'" & txt_checkin.Text & "' ,'" & Me.txt_checkout.Text & "' )"
i want that if no_single_room.Text is null and have no value it should convert it into zero other wise Int32.Parse(no_single_room.Text) in same insert statement
I have a class with properties for stuff like FileNumber, OpenedDate, ClosedDate etc.When I Initialise the class I set the datetime variables to Date.MinValue.Then when I populate my textboxes I check if the value of the date variables are Date.Minvalue and I set the textbox text to an empty string.
Code:
If(File.OpenedDate = Date.MinValue, String.Empty, File.OpenedDate.ToString("yyyy/MM/dd"))
However whe I try to save the data to my sql server db I get a datetime out of range error. What is the correct way to handle these null values in my date columns?
SELECT {} ON 0,
{[Sales Person].[Sales Person].ALLMEMBERS} ON 1
FROM [Sales]
If i run the above query in SQL Management Studio its displaying the below record
[color=Red]All[/color]
Bill
Fred
John
Mary
Unknown
But if i run the same in SSRS 2008, I'm getting the output as
[color=Red](null)[/color]
Bill
Fred
John
Mary
Unknown
I'm getting [b]null [/b]instead of [b]All[/b] I don't know why it is happening.But i want to show ALL value in report
I have a treeview in my .aspx: <asp:TreeView ID="tvDocCatAndType" runat="server" /> Not much else going on in the page -- two <asp:LinkButtons> and one <asp:Label>; the page is a child of a master page, so these controls are within a <asp:Content> control. I populate the treeview in code -- just 3 node levels, including the root node. All nodes have checkboxes, and I initialize all node.Checked to true. I have some Javascript to do the usual check/uncheck up and down the tree as parent and child node checkboxes are toggled.
No matter how many checkboxes I clear in the UI, on postback every single node has node.Checked = true regardless of the state of the checkbox in the UI. This is not the first time I've used a treeview, but I've never had this problem before. I created this page by light adaptation of an earlier project that works fine.