sql server 2016 books

right when creating the sqlconnection object:// Create the connection object and set the connection stringSqlconnection connection = new sqlconnection ("... connection string ...");// Open the connectionConnection. open ();A final note about the connection string is that several synonyms can be used inside it;Example, instead of server, you can use data source or data server, and instead of database,You ca

. Reference documents Microsoft Books Online logical operators and physical operator references Refer to the book SQL. server.2005. Technical Insider "series Conclusion This article is here first, this article mainly describes the T-SQL statement tuning from the execution plan, and introduces three

Tens implementation of SQL Server database table partitioning 2010-09-10 13:37 anonymous databasefont Size:T | T In general, under the Tens data pressure, partitioning is a better way to improve performance. This article describes the implementation of a SQL Server database table partition.Ad:51cto Net + 12th salon: T

Modify the SQL Server Name (@ servername) After SQL server2005 is installed, the computer name (xiage) is changed ), However, the @ servername returned by the database is still fb4b6c04012d449/sqlexpress (the original default computer name/sqlexpress is not automatically updated .) We can modify the settings by deleting and adding services. Before Modifica

Objective:There is a database for historical archive (for short, historical library), after a certain amount of time accumulated, data files have reached more than 700 GB, and later decided that some data can not be retained, this part of the data truncate, spare more than 600 GB of space, that is, after shrinking, Theoretically, the database is only more than 100 g. To do this, I was ready to shrink after rebuilding the clustered index for each table (with a few tables, but a single-table numbe

metadata, and you should consider using these objects.However, the information schema views show is only objects compatible and the SQL-92 standard. This means no information Schema view exists for certain features, such as indexes, which aren ' t defned in the standard. (Indexes is an implementation detail.) If your code doesn ' t need toBe strictly portable, or if your need metadata about nonstandard features such as indexes, Flegroups, the CL

. Saves all sorts of Shenma sorting de-duplication... stream aggregation de-duplication... and so on.It seems that the AND connector is a very handsome operator... so many times we try to write OR, it is better to switch to AND more efficiently.ReferencesLogical operators and physical operators in Microsoft books onlineReference books: SQL.

SQL Server Functions -- Aggregate functionsUse pubsGoSelect AVG (distinct price) -- calculate the averageFrom titlesWhere type = 'business' Use pubsGoSelect max (ytd_sales) -- maximum numberFrom titles Use pubsGoSelect min (ytd_sales) -- Minimum NumberFrom titles Use pubsGoSelect Type, sum (price), sum (advance) -- sumFrom titlesGroup by type order by type Use pubsGoSelect count (distinct city) -- calculate