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In a previous article Online non-NULL with values column add in SQL Server 2012 I talked about how adding a non-null column with default values is now an online operation in SQL Server 2012 and I mentioned how the situation when the newly added column Read More...
SQL Server supports online index and table rebuild operations which allow for maintenance operations to occur w/o significant downtime. While a table is being rebuild, or a new index is being built on it, the table is fully utilizable. It can be queried Read More...
Starting with SQL Server 11 the the SEND verb has a new syntax and accepts multiple dialogs handles to send on: SEND ON CONVERSATION [(]conversation_handle [,.. @conversation_handle_n][)] [ MESSAGE TYPE message_type_name ] [ ( message_body_BLOCKED EXPRESSION Read More...
Prior to SQL Server 11 when you add a new non-NULLable column with default values to an existing table a size-of data operation occurs: every row in the table is updated to add the default value of the new column. For small tables this is insignificant, Read More...
In my previous article How to use columnstore indexes in SQL Server we’ve seen how to create a columnstore index on a table and how certain queries can significantly reduce the IO needed and thus increase in performance by leveraging this new feature. Read More...
Column oriented storage is the data storage of choice for data warehouse and business analysis applications. Column oriented storage allows for a high data compression rate and as such it can increase processing speed primarily by reducing the IO needs. Read More...
When SQL Server 2005 introduced BEGIN TRY and BEGIN CATCH syntax, it was a huge improvement over the previous error handling based on @@ERROR check after each statement. Finally, T-SQL joined the rank of programming languages, no more just a data access Read More...
Along with SQLPASS Summit 2010 announcements on SQL Server “Denali” features the MSDN site has published preliminary content on some of these features. Going over the “HADR” Overview (SQL Server) content we can get an early idea Read More...