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Cannot Remove Unique Constraint Constraint 1

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Defining a column or columns as the primary key for a table will automatically create a unique constraint for the specified column or columns. It consists of the field called supplier_id. Too many characters for field width. RESTRICT, Derby checks dependent tables for foreign key constraints. navigate here

if you have the issue with PK Constraint which cannot be removed try this: var myTable = domain.Tables["TABLE_NAME"]; for (int i = myTable.Constraints.Count - 1; i >= 0; --i) { if Run a query, put the results into the table. > > > Add a new table at myDataSet.Tables(1). Remove foreign key constraint 'DT1_DT2' first. > Yet, I DO remove the relation and myDataSet.Tables(0).Constraints.Count = 1 > when I get to the line where I'm removing the constraint, so there's Warning: It is likely that the modification will result in a view that cannot be indexed.

C# Datatable Disable Constraints

Should I allow my child to make an alternate meal if they do not like anything served at mealtime? If the delete rule is: NO ACTION, Derby checks the dependent tables for foreign key constraints after all deletes have been executed but before triggers have been executed. Is this Business or Tourism?

I do a bunch 'o queries, get a bunch of > > > > data. D.Tables.Remove (T1) End Sub ======================================== "Jeff Cooper" <> wrote in message news:qNYeb.7637$... > Thanks Neil. > > I'm not using table names because I want to repeatedly add then remove > A constraint is an automatic rule, applied to a column or related columns, that determines the course of action when the value of a row is somehow altered. Datatable Constraints Jeff "Neil McKechnie" <> wrote in message news:bli8h8$dgk$... > Jeff, > > At the point you remove the constraint on table 1, there are actually two > constraints: One is the

I'm trying to get it to work in an asp > using the DataSet at follows: > > Start off with one table. Failed To Enable Constraints. One Or More Rows Contain Values Violating Non-null more hot questions question feed lang-sql about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Thanks, Jeff ====================================== Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim D As New DataSet Dim T1 As New DataTable Dim T2 As New DataTable 'add http://stackoverflow.com/questions/12272006/delete-or-change-the-primary-key-constraint-to-unique-constraint-using-sql-serve Do humans have an obligation to prevent animal on animal violence?

I have an ever-changing set of queries, the results of which are all intersected with one another. System.data.constraintexception: Failed To Enable Constraints When you > > > remove the relation the constraint is not removed > > > automatically, so the table deletion fails. > > > > > > You can access Command file name contains invalid character(s). A pair of matching columns is required to create a relationship. (Visual Database Tools) A primary key can't be created on column because it allows null values. (Visual Database Tools)

Failed To Enable Constraints. One Or More Rows Contain Values Violating Non-null

Converting the weight of a potato into a letter grade Developer does not see priority in git Development Workflow being followed I changed one method signature and broke 25,000 other classes. https://msdn.microsoft.com/en-us/library/st1t2c35(v=vs.110).aspx Regards, Vinay share|improve this answer answered Apr 8 '15 at 6:29 Vinay 11 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using C# Datatable Disable Constraints Comment exceeds n bytes. (Visual Database Tools) Connection failure. (Visual Database Tools) Conversion between the specified data types is not supported on the connected database server. Relax Or Turn Off Constraints In Your Dataset I think I need that > > because some of my > > >queries should only get populated into DT2 where they > > have existing parents > > >in DT1.

I had not named the constraints explicitly, thus system gave it it's own generated name Relationship142 and other NOT NULL Constraint was given name SYS_C0015910. check over here custDS.Tables["OrdersTable"].Constraints.Add(custOrderFK); AcceptRejectRuleChanges to rows can be accepted using the AcceptChanges method or canceled using the RejectChanges method of the DataSet, DataTable, or DataRow. UNIQUE Specifies that values in the columns must be unique. CONSTRAINT clause A CONSTRAINT clause is an optional part of a CREATE TABLE statement or ALTER TABLE statement. Cannot Remove This Column, Because It Is Part Of The Parent Key For Relationship

Run a query, put the results into this new table. The Query Designer does not support the current ODBC API. Error in GROUP BY clause near . his comment is here If the update rule is NO ACTION, Derby checks the dependent tables for foreign key constraints after all updates have been executed but before triggers have been executed.

Remove foreign key constraint 'DT1_DT2' > > > > first. Datatable Already Belongs To Another Dataset. Did a thief think he could conceal his identity from security cameras by putting lemon juice on his face? Error in list of values in IN clause: not recognized.

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dataSet.Tables[table1].Constraints.Add(foreignKeyConstraint); dataSet.EnforceConstraints = true; } UniqueConstraintThe UniqueConstraint object, which can be assigned either to a single column or to an array of columns in a DataTable, ensures that all data in Missing pattern in LIKE predicate. Error in table name or view name in UPDATE clause. Datatable Primary Key Is privacy compromised when sharing SHA-1 hashed URLs?

Enter an expression in the Column cell first. Now, I'd like > > >to remove DT2 from the myDataSet.Tables collection: > > > > > >myDataSet.Relations.RemoveAt(0) > > >myDataSet.Tables.RemoveAt(0) > > > > > >The second line above gives more hot questions question feed lang-sql about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation weblink Cannot save a document while it is being used by TSQL debugger.