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Normally you should avoid the sp_ prefix for your stored procedures. Use it only in development or for testing, and not in your production databases. Also, it may be required to mark your newly created procedure as a system object with an undocumented stored procedure sp_MS_MarkSystemObject. Otherwise your procedure may not work properly with all databases within the SQL Server instance. Remember that the sp_MS_MarkSystemObject system procedure is for internal use only and isn t supported by Microsoft; therefore, never use it against objects in your production databases.

Step-down Most solid-state electronic devices, such as radios, need only a few volts The power supplies for such equipment use step-down power transformers The physical size of the transformer depends on the current Some devices need only a small current and a low voltage The transformer in a radio receiver, for example, can be physically small A ham radio transmitter or hi-fi amplifier needs more current This means that the secondary winding of the transformer must consist of heavy-gauge wire, and the core must be bulky to contain the magnetic flux Step-up Some circuits need high voltage The cathode-ray tube (CRT) in a conventional home television set needs several hundred volts Some ham radio power amplifiers use vacuum tubes working at more than 1 kV dc The transformers in these appliances are step-up types They are moderate to large in size, because of the number of turns in the secondary, and also because high voltages can spark, or arc, between wire turns if the windings are too tight If a step-up transformer needs to supply only a small amount of current, it need not be big But for ham radio transmitters and radio or television broadcast amplifiers, the transformers are large, heavy, and expensive Transformer Ratings Transformers are rated according to output voltage and current For a given unit, the volt-ampere (VA) capacity is often specified This is the product of the voltage and current

The procedure has two parameters: @object (the name of the database object for which the column list should be returned) and @horizontal this parameter decides whether the columns are returned as a single line (@horizontal = 1) or each column is returned as a single line in a result set (@horizontal <> 1). The SET NOCOUNT ON line should be used as a best practice in every stored procedure you write to limit the information messages (such as the number of rows affected by the query) sent by SQL Server to the applications. My procedure uses a table variable called @lines. A simple IF condition controls the way the column/parameter list is inserted into the @lines variable. I wanted the result list to be comma separated; therefore, the comma is concatenated to every column/parameter name. The last comma is unnecessary, so I remove it, either by using LEFT function (for column/parameter list returned horizontally) or by simple UPDATE statement (for the list returned vertically). Finally, all rows from the @lines table variable are returned in the appropriate order. Simple, isn t it All you have to do after you create the procedure is to assign a custom keyboard shortcut to it. Then you can test the util. Go to one of your databases, write the name of one of your database objects (if you use the fully qualified name of the object, put it in single quotes), and press the appropriate keys on your keyboard. The example is shown in figure 5. A parameter list of the Figure 1 Sample use of the sp_getcolumns utility sp_getcolumns stored procedure is returned (current database: master). Some thoughts on how you can improve the procedure presented in this chapter: Add an option to return the data types of the columns/parameters.

[the ID property] A cardinal integer (1, 2), an ordinal integer (1st, 2nd), an ordinal word (first, second, up to tenth), or a positional word (last, front, back) middle

Use nvarchar(max) data type for line column in the @lines table variable and for the @line variable (in SQL Server 2005/2008 only). Perform concatenation with FOR XML PATH clause (in SQL Server 2005/2008 only) or CLR aggregate function (this will let you avoid the nasty string concatenation performed on the @line variable). Use the NOLOCK hint to avoid unnecessary locking on the system objects.