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Solutions to the Exercises
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As declare @intCountProperties int, @chvProperty varchar(50), @chvValue varchar(50), @chvUnit varchar(50), @insLenProperty smallint, @insLenValue smallint, @insLenUnit smallint, @insLenProperties smallint, @chvOldProperty varchar(50) -- identify Properties associated with asset select @chvProperty = Property, @chvValue = Value, @chvUnit = Unit from InventoryProperty inner join Property on InventoryProperty.PropertyId = Property.PropertyId where InventoryProperty.InventoryId = @intInventoryId and Property = (Select Min(Property) from InventoryProperty inner join Property on InventoryProperty.PropertyId = Property.PropertyId where InventoryProperty.InventoryId = @intInventoryId) set @chvProperties = '' -- loop through list of properties while @chvProperty IS NOT NULL begin if @debug <> 0 select @chvProperty Property, @chvValue [Value], @chvUnit [Unit] -- check will new string fit select @insLenProperty = DATALENGTH(@chvProperty), @insLenValue = DATALENGTH(@chvValue), @insLenUnit = DATALENGTH(@chvUnit), @insLenProperties = DATALENGTH(@chvProperties) if @insLenProperties + 2
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SQL Server 2000 Stored Procedure Programming
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+ @insLenProperty + 1 + @insLenValue + 1 + @insLenUnit > 8000 begin select 'List of properties is too long (over 8000 characters)!' return 1 end -- assemble list set @chvProperties = @chvProperties + @chvProperty + '=' + @chvValue + ' ' + @chvUnit + '; ' if @debug <> 0 select @chvProperties chvProperties -- set values to nulls to stop loop if record is not read -- but preserve the old value select @chvOldProperty = @chvProperty, @chvProperty = NULL, @chvValue = NULL, @chvUnit = NULL -- let's go another round and get another property select @chvProperty = coalesce(Property, ''), @chvValue = coalesce(Value, ''), @chvUnit = coalesce(Unit, '') from InventoryProperty inner join Property on InventoryProperty.PropertyId = Property.PropertyId where InventoryProperty.InventoryId = @intInventoryId and Property = (Select Min(Property) from InventoryProperty inner join Property on InventoryProperty.PropertyId = Property.PropertyId where InventoryProperty.InventoryId = @intInventoryId and Property > @chvOldProperty) end return 0
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Solutions to the Exercises
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CHAPTER 11. INTERACTION WITH THE SQL SERVER ENVIRONMENT
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Create a trigger on the ActivityLog table that will send e-mail to the administrator when any record that contains the word Critical as the first word of a Note is inserted.
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Exercise 11.1 Solution
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Use the following code:
Create Trigger trActivityLog_CriticalNote_IU On dbo.ActivityLog For Insert, Update As if Exists(Select * from inserted where Left(Note,8) = 'Critical') Exec xp_sendmail @recipients = 'dejans; mirjanas', @subject = 'Critical activities recorded ' + 'in Activity Log of Asset database', @attach_results = 'TRUE'
Exercise 11.2
Create a Transact-SQL batch that will compress files in the backup folder and transfer them to a drive on another machine.
SQL Server 2000 Stored Procedure Programming
Exercise 11.2 Solution
The following statement uses PKZIP to compress all .dat files from the backup directory and place them on the C drive of the machine designated as P200:
xp_cmdshell 'c:\utl\pkzip -m \\p200\c\all.zip c:\mssql7\backup\*.dat'
Exercise 11.3
Create a Transact-SQL batch that will create a scheduled job for compressing backup files. The job should be scheduled to run once a day.
Exercise 11.3 Solution
Use the following code:
USE msdb EXEC sp_add_job @job_name = 'ZIP Backup', @enabled = 1, @description = 'ZIP Backup files and put them on backup server', @owner_login_name = 'sa' EXEC sp_add_jobstep @job_name = 'ZIP Backup', @step_name = 'ZIP', @subsystem = 'TSQL', @command = " exec xp_cmdshell " + "'c:\util\pkzip \\p200\c\all.zip c:\mssql7\backup\*.dat' " EXEC sp_add_jobschedule @job_name = 'ZIP Backup', @name = 'Nightly ZIP', @freq_type = 4, -- daily @freq_interval = 1, @active_start_time = '23:45'
Appendix B:
Solutions to the Exercises
CHAPTER 12. XML SUPPORT IN SQL SERVER 2000
Exercise 12.1
Create a stored procedure that returns an element-centric XML document and schema with information about a specified Order. Associated tables are shown in the following diagram:
Exercise 12.1 Solution
It is simple to create such a stored procedure. You can start by creating a Select statement that contains all these tables. Then you can add a For XML clause, and at the end, you can encapsulate everything in a stored procedure such as the following:
Create Procedure prOrderGetXML @intOrderId int as SELECT *
SQL Server 2000 Stored Procedure Programming
FROM dbo.Contact INNER JOIN [Order] ON Contact.ContactId = [Order].RequestedById INNER JOIN OrderItem ON [Order].OrderId = OrderItem.OrderId INNER JOIN OrderStatus ON [Order].OrderStatusid = OrderStatus.OrderStatusId INNER JOIN OrderType ON [Order].OrderTypeId = OrderType.OrderTypeId where [Order].OrderId = @intOrderId for XML Auto, elements, xmlData return @@error
You can execute the stored procedure using the following code:
DECLARE @RC int DECLARE @intOrderId int -- Set parameter values SET @intOrderId = 1 EXEC @RC = prOrderGetXML @intOrderId
SQL Server returns the following document containing both inline schema and Order data:
<Schema name="Schema" xmlns="urn:schemas-microsoft-com:xml-data" xmlns:dt="urn:schemas-microsoft-com:datatypes"> <ElementType name="dbo.Contact" content="eltOnly" model="closed" order="many"> <element type="dbo.Order" maxOccurs="*"/> <element type="ContactId"/> <element type="FirstName"/> <element type="LastName"/> <element type="Phone"/> <element type="Fax"/> <element type="Email"/> <element type="OrgUnitId"/> <element type="UserName"/> <element type="ts"/> </ElementType> <ElementType name="ContactId" content="textOnly" model="closed" dt:type="i4"/> <ElementType name="FirstName" content="textOnly"
Appendix B:
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