The ‘missing’ value can be queried, updated, indexed, exactly as if the update during ALTER TABLE really occurred.There is no measurable performance penalty from having a default value. The ‘default’ value is pushed into the row, even if the column was not modified.Types that cannot be converted to sql_variant cannot be added online, like hierarchy_id, geometry and geography or user CLR based UDTs.
The SELECT, INSERT, UPDATE, DELETE, and MERGE statement are collectively referred to DML (Data Manipulation Language) statements.
15), the record has the value 42 in it (the hex 2a000000) and the Column 3 now has a real offset and physical size.
So the update has trully materialized the default value in the row image.
These statements allow you to view and modify data. In this article we look at how we can add, modify, and remove data with the INSERT, UPDATE, and DELETE statements. All the examples for this lesson are based on Microsoft SQL Server Management Studio and the Adventure Works2012 database.
You can get started using these free tools using my Guide The INSERT statement is used to add one or more rows to a database table.