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The key to making partition table data loading and removal fast is minimizing data movement, making sure SPLIT and MERGE are metadata operations only. In order to cover these issues, there are many important topics that had to be left out. Here are a few of them, which you can use as directions for research: Placing filegroups for partition schemes The NEXT USED property of filegroups in a partition scheme Creating a table on a partition scheme Partitioned indexes and index alignment The sliding-window scenario

Instead of displaying a dialog box, you can display an alert a window that notifies the user that there s a problem and offers information or different buttons for solving the problem There s a wide overlap between dialog boxes and alerts, so it can sometimes be hard to choose which to use That means our first order of business is to sort out what the differences are between alerts and standard dialog boxes

Ron Talmage is a mentor and cofounder of Solid Quality Mentors. He s a SQL Server MVP, a PASS Regional Mentor, and current president of the Pacific Northwest SQL Server Users Group. He has been writing white papers and articles on SQL Server since way back when.

(c) FSK (d) USB 17 The bandwidth of a fax signal is kept narrow by (a) sending the data at a slow rate of speed (b) maximizing the number of digital states (c) optimizing the range of colors sent (d) using pulse modulation 18 The dynamic range in a superhet is largely influenced by the performance of the (a) local oscillator (b) product detector (c) front end (d) selectivity in the IF chain 19 Frequency sweeping can be used to get a transmitter to produce (a) spread-spectrum signals (b) time division multiplexed signals (c) narrowband AM signals (d) double sideband, suppressed carrier signals 20 Fill in the blank to make the following sentence true: The reception of improved by the use of DSP (a) SSB signals (b) SSTV signals (c) synchronized communications signals (d) any of the above can be

32 Partitioning for manageability (and maybe performance)

The difference between alerts and dialog boxes may be clear to Apple s human interface design experts, but most users treat alerts in the same way as dialog boxes as something to deal with and dismiss as quickly as possible This means it s not worth agonizing over whether to use a dialog box or an alert in cases where either will work; just make sure your code works, and all will be well

Large tables are a bane to database administrators (DBAs). It takes seemingly forever to rebuild indexes on tables with many millions or billions of rows, not to mention the exorbitant space required to do so. For example, you must maintain more than 1 terabyte (TB) of database free space just to rebuild the clustered index on a 1 TB table, because both the old and new index must coexist until the rebuild is done. Developers are challenged to design applications that can load, purge, or archive vast amounts of data efficiently while providing high data availability. SQL Server s table and index partitioning feature is a great way to address these manageability and load/purge/archive issues. But you must be aware that partitioning is a fundamental structural change that influences execution plans and query performance. Care is needed to implement partitioning wisely to maximize performance and manageability benefits while avoiding potential problems. Before I discuss important partitioned table design considerations and common pitfalls, let s first review core partitioning concepts.

signals or quantities that vary over a continuous range A simple analog waveform is shown at Fig 26-1A; note that the amplitude varies smoothly over time Figure 26-1B is an example of a digital approximation of the same signal

The table partitioning feature is available in Enterprise and Developer editions of SQL Server 2005 and later versions. Partitioning a table or index divides it into partitions (subsets) based on the partitioning column value. Each partition has welldefined boundaries to ensure that a given partitioning column value is mapped to exactly one partition and a partition exists for all possible values. A table or index can be partitioned based on any persisted column value, with the exception of columns of data type text, ntext, image, xml, timestamp, varchar(max), nvarchar(max), varbinary(max), and FILESTREAM. The timestamp data type is disallowed because it is a synonym for the rowversion data type and not related to date or time. Each partition is a complete heap or b-tree structure, as illustrated in figures 1 and 2. This allows a partition to be managed individually in data definition language (DDL) operations when it is advantageous to do so. For example, a