By Allan Mitchell, Mark Allison
Real-World SQL-DMO for SQL Server delves into the main points of administering Microsoft SQL Server utilizing the SQL-DMO item library. Authors Allan Mitchell and Mark Allison have packed the e-book with factors and dealing code to help you use the library to its complete power. also, Mitchell and Allison supply suggestion approximately whilst (and while not) to take advantage of the SQL-DMO software programming interface (API).
The code during this publication has been attempted and verified at websites the place database directors often deal with greater than 50 SQL Servers, making sure that the options should be carried out on environments of just about any scale.
Whether youre a developer or a database administrator, this ebook will take you to the subsequent point in SQL Server administration.
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The result of this is shown in Figure 1-12. Name I rtMyDataType dbo varchar 20 o Figure 1-12. New datatype created Creating Triggers for a Table Because the application doesn't create triggers, we'H very quickly show you how to create one for a table. A trigger can fire on any of these actions on your table: INSERT, UPDATE, and DELETE. 0 has only one type oftrigger, which is referred to as an AFTER trigger. It works in this way: You perform your action against the table that the trigger is defined on, and this fires the trigger.
You enter the name of a table in the Table Name text box and then you enter a eolumn name in the Column Name text box. You seleet a datatype for the neweolumn, and if it's a eharaeter field, you ean enter a length for it. You also have options to assign defaults to the eolumn and indicate whether the eolumn will aeeept NULLs or not. Figure 1-9 shows the design of your new table and Table 1-1 helps you to visualize it. Table 1-1 shows the grid eolumns and their meaning. The first eolumn in the grid indicates whether the eolumn is a primary key eolumn, the seeond eolumn eontains the name of the eolumn, the third eolumn holds the datatype, the fourth eolurnn eontains the length (if any), the fifth eolurnn indieates whether the eolurnn will aeeept NULL values or not, the sixth eolumn shows any default eonstraint on the eolumn, and finally, the seventh tells us if the eolumn is an identity eolumn, and the eighth and ninth eolumns show the inerement and seed for the eolumn identity property.
Let's say you have a test SQL Server upon which you've instalied SQL Server Desktop Edition. You're going to be simulating a lot of users connecting and disconnecting. You know that by default the option to AUTO_CLOSE the database is set to true in this edition of SQL Server. It will produce a lot of overhead if you leave it like this, so far this exercise you'lI want to change the default. T-SQL IF (DATABASEPROPERTY ('MyDMODatabase', 'IsAutoClose')) ; 1 Begin EXEC sp_DBOption 'MyDMODatabase', 'autoc1ose',FALSE End Figure 1-7 shows where you can set your auto options (version 2000).