Jun 21, 2016 · ALTER TABLE [dbo.table_name] ADD [Column_Name] BIT NOT NULL Default ( 0 ) Here is another way to add a column to an existing database table with a default value. A much more …

The table already has an existing compound-key [PersonId, Pname] as the primary key. Now I want to modify that existing compound-key to have one more field [PMid].

Jun 14, 2011 · 409 I would like to write a single SQL command to drop multiple columns from a single table in one ALTER TABLE statement. From MSDN's ALTER TABLE documentation...

83 Is it possible to add a column to a table at a specific ordinal position in SQL Server? For instance, our tables always have CreatedOn, CreatedBy, LastModifiedOn, LastModifiedBy columns at the "end" of …

Jan 24, 2015 · I need to ALTER the data types of several columns in a table. For a single column, the following works fine: ALTER TABLE tblcommodityOHLC ALTER COLUMN …

Mar 9, 2009 · I am trying to change a column from a varchar(50) to a nvarchar(200). What is the SQL command to alter this table?

Sep 17, 2010 · My MS SQL Server will allow me to run "ALTER TABLE table_name ADD UNIQUE (column_name)" as many times as I want. If I then go into SQL Management Studio and examine the …

Mar 16, 2011 · Can you add a column to a table inserting it in between two existing columns in SQL Server without dropping and re-creating the table?

Sep 23, 2008 · Is there a way to alter the precision of an existing decimal column in Microsoft SQL Server?

I have a foreign key constraint in my table, I want to add ON DELETE CASCADE to it. I have tried this: alter table child_table_name modify constraint fk_name foreign key (child_column_name)