In the nicest possible way. :) Mladen 2007-05-18 re: SQL Server 2005: How to have a Unique Constraint with multiple NULLS on a column hmm... i wouldn't be telling people that if i were you :))) ML 2007-05-18 re: SQL Server 2005: How to have a Unique Constraint with multipl...
MS SQL Server Operators: UNIQUE ADD CONSTRAINT ALTER TABLE Table of Contents Problem: Example: Solution 1: Creating new table with a UNIQUE constraint Discussion: Solution 2: Adding a UNIQUE constraint to an existing table Discussion: Solution 3: Adding a multi-column UNIQUE constraint to an exis...
I have many tables with existing 'unique clustered' indexes. I would like to be able to add the 'primary key' attribute without dropping/recreating the clustered index. Is this p...
When designing an SQL database, there may be cases where you want to impose restrictions on what data can be added to certain columns in a table. SQL makes this possible through the use ofconstraints. After applying a constraint to a column or table, any attempts to add data to the colu...
constraint, any other index you add has to be done through a UNIQUE constraint. As its name implies, the combination of columns that make up the UNIQUE constraint's key must be unique. So, any combinations of columns that also include the PRIMARY KEY constraint's columns arede factounique,...
How to change columns in a unique constraint Over time you may want to add or remove columns from a unique constraint. As with check constraints, you'll need to create a new constraint and drop the original. The process for doing this online has an extra step: ...
1: Using the UNIQUE Constraint The first option is to use theUNIQUEconstraint when defining a column in a table. This constraint guarantees that the information in the column is distinct and precludes the addition of any duplicates. To add theUNIQUEconstraint to a column, you need to modify ...
Because index names must be unique for a table, you cannot create or rename an index to have the same name as the primary key or unique constraint for the table. To rename an index In Object Explorer, right-click the table with the index you want to rename and click Design. From the...
First Check I added a very descriptive title to this issue. I used the GitHub search to find a similar issue and didn't find it. I searched the SQLModel documentation, with the integrated search. I already searched in Google "How to X in...
Add hyperlink control to datagrid Add Labels into Table Add LinkButton as Link for Downloading file from site. Add logo image in mail footer using c# Add Multiple link buttons in a cell dynamically add multiple listbox value to add another list box Add onClick event to Label control add onC...