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Cannot Remove Unique Constraint


Error in WHERE clause near . Unique constraints can span more than one column, and it's possible for a single column to be part of more than one unique constraint. –Jim Mar 20 '14 at 15:26 add Is adding the ‘tbl’ prefix to table names really a problem? Remove foreign key constraint CONSTRAINT_NAME first". http://sauvblog.com/cannot-remove/cannot-remove-unique-constraint-constraint-1.html

Now, I'm into a vicious circle. Any help would be much appreciated. Jeff Cooper Guest Hi folks, I have a DataSet in which I have a couple of DataTables. asked 5 years ago viewed 38771 times active 1 month ago Upcoming Events 2016 Community Moderator Election ends Nov 22 Linked 0 Drop unique constraint on column 128 How to drop

C# Datatable Disable Constraints

The Allow Nulls property can't be set on a column that is part of the primary key. (Visual Database Tools) The Allow Nulls property can't be set on column because Cannot edit this cell. If there are existing rows in the table, the values in the column for which the SET INCREMENT default was added do not change. Defining a column or columns as the primary key for a table will automatically create a unique constraint for the specified column or columns.

For example, if a value in a row of one table is updated or deleted, and that same value is also used in one or more related tables, a ForeignKeyConstraint determines statement that's not present in the original script set. –Álvaro González Sep 5 '11 at 6:34 add a comment| up vote 5 down vote Seems very strange. where can i find this >sql script? > > > > thanks! > > oracle newbie > > > > > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com Datatable Constraints Use of GROUP BY function in WHERE clause not allowed.

Dropping constraintsALTER TABLE DROP CONSTRAINT drops a constraint on an existing table. Failed To Enable Constraints. One Or More Rows Contain Values Violating Non-null CASCADE/RESTRICT doesn't consider whether the column being dropped is used in any indexes. Similar Threads Does DataView(DataTable) constructor just return DataTable.DefaultView? click here now Cannot assign alias to this field.

Yes No Do you like the page design? System.data.constraintexception: Failed To Enable Constraints I tried removing the constraints as you mentioned, but get an error: : Cannot remove unique constraint 'Constraint1'. It > errors at the line " D.Tables(0).Constraints.RemoveAt(0)". Table is not in the query definition.

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

Incomplete parameters or column list. https://msdn.microsoft.com/en-us/library/st1t2c35(v=vs.110).aspx Derby also raises an error if you specify RESTRICT when you drop a column referenced by the generation-clause of a generated column. C# Datatable Disable Constraints at > > >System.Data.UniqueConstraint.CanBeRemovedFromCollection... > > . Relax Or Turn Off Constraints In Your Dataset Not the answer you're looking for?

Save changes before closing? check over here In it, you'll get: The week's top questions and answers Important community announcements Questions that need answers see an example newsletter By subscribing, you agree to the privacy policy and terms An expression cannot be used as a parameter value. Unexpected internal failure while adding create scripts. Cannot Remove This Column, Because It Is Part Of The Parent Key For Relationship

Any help will get you my first born .. PC Review Home Newsgroups > Microsoft DotNet > Microsoft ADO .NET > Home Home Quick Links Search Forums Recent Posts Forums Forums Quick Links Search Forums Recent Posts Articles Articles Quick When a DataSet contains ForeignKeyConstraints, invoking the AcceptChanges or RejectChanges methods enforces the AcceptRejectRule. his comment is here Use the syntax for table-level constraint when adding a constraint with the ADD TABLE ADD CONSTRAINT syntax.

View definition includes no output columns or no items in the FROM clause. Datatable Primary Key This operator cannot be used with columns with data type "uniqueidentifier". Hyper Derivative definition.

Run a query, put the results into the table. > Add a new table at myDataSet.Tables(1).

Data type mismatch - use the CONVERT function. Is there any solution except copying data into a new table without constraint and removing old table (it is rather difficult because I have foreign keys that link to another column ISA posted Nov 6, 2016 at 10:08 PM junk mail no entry david cherry posted Nov 6, 2016 at 9:54 PM WCG Stats Sunday 06 November 2016 WCG Stats posted Nov Datatable Already Belongs To Another Dataset. To work around such conflicts, use the RESTART WITH syntax to specify the next value that will be generated for the identity column.

Ignoring ODBC syntax. How to give Permission to create sandbox? Rows pasted. weblink We appreciate your feedback.

Any help? –SKINDER Mar 31 '11 at 13:01 @Mitch Wheat: I have found a link to my table - it is object_id, but I cannot find a link to Yes No Additional feedback? 1500 characters remaining Submit Skip this Thank you! Strength check between medium size and large size How to give Permission to create sandbox? And, there IS only one constraint on T1, the one I'm trying to remove.

D.Relations.RemoveAt(0) D.EnforceConstraints = False 'this seem to have no effect at all, by the way. Invalid value. Alternatively, you could do both of these commands at the same time with the command alter table t drop constraint u1 including indexes; share|improve this answer edited May 14 '15 at Missing FROM clause near .

there it is! 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 The valid range for 'SQL query time-out' is 1-65535. nivrip posted Nov 7, 2016 at 3:35 PM Highlight date ranges DécioC posted Nov 7, 2016 at 10:42 AM WCG Stats Monday 07 November 2016 WCG Stats posted Nov 7, 2016

The Query Designer does not support the critical ODBC APIs. ALTER TABLE ADD UNIQUE or PRIMARY KEY provide a shorthand method of defining a primary key composed of a single column. It's not as though you will be executing a script like this every minute. –Tony Apr 1 '11 at 7:38 add a comment| up vote 0 down vote If you know Are you sure that you want to permanently delete the specified item from the database?

Yes, my password is: Forgot your password? up vote 13 down vote favorite 2 I have a table 'users' with 'login' column defined as: [login] VARCHAR(50) UNIQUE NOT NULL Now I want to remove this unique constraint/index using