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Exercise 4.3
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When variables are assigned with a Select statement that returns a recordset instead of a single record, which values will be assigned to the variables
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Exercise 4.3 Solution
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Values from the last record are assigned to the variables. The order of the records depends on the index that SQL Server uses to query the database.
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Appendix B:
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Solutions to the Exercises
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Exercise 4.4
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What values will be assigned to the variable when a Select statement returns an empty recordset
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The values of variables are not changed in such a case.
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Exercise 4.5
Create two stored procedures prStoreOrder, which will insert an order and return an Order number, and prStoreOrderItem, which will insert the order item.
Exercise 4.5 Solution
The following stored procedures are designed to store Orders and Order Items:
CREATE PROCEDURE prStoreOrder_1 @OrderDate smalldatetime, @RequestedById int, @TargetDate smalldatetime, @DestinationLocationId int, @Note varchar(1000), @OrderTypeId int, @OrderStatusid int, @BillingOrgUnitId int, @VendorOrgUnitId int, @OrderId int OUTPUT AS insert into [Order] (OrderDate, RequestedById, TargetDate, DestinationLocationId, Note, OrderTypeId, OrderStatusid, BillingOrgUnitId,VendorOrgUnitId) values ( @OrderDate, @RequestedById, @TargetDate, @DestinationLocationId, @Note, @OrderTypeId, @OrderStatusid, @BillingOrgUnitId, @VendorOrgUnitId) Select @OrderId = @@identity go
SQL Server 2000 Stored Procedure Programming
CREATE PROCEDURE prStoreOrderItem_1 @OrderId int, @InventoryId int, @EquipmentId int, @Note varchar(1000) AS insert into OrderItem (OrderId, InventoryId, EquipmentId, Note) values (@OrderId, @InventoryId, @EquipmentId, @Note)
You can use the following batch to execute these stored procedures:
declare @intOrderId int exec prStoreOrder_1 @OrderDate = '11/11/1999', @RequestedById = 1, @TargetDate = '11/13/1999', @DestinationLocationId = 1, @Note = 'Handle with care!', @OrderTypeId = 2, @OrderStatusid = 1, @BillingOrgUnitId = 1, @VendorOrgUnitId = 2, @OrderId = @intOrderId OUTPUT exec prStoreOrderItem_1 @intOrderId, 12, Null, 'Not functional!' exec prStoreOrderItem_1 @intOrderId, 11, null, 'Not functional!'
Exercise 4.6
Create a stored procedure that creates a temporary table with just one integer field. The stored procedure should then insert numbers from 1 to 100 into the table and at the end return those numbers as a resultset to the caller.
Exercise 4.6 Solution
This kind of task or stored procedure might look to you like a complete waste of time, but on several occasions I have had to use a solution based on the existence of a table with nothing but sequential integer numbers:
Appendix B:
Solutions to the Exercises
CREATE PROCEDURE prInsert100 AS set nocount on create table #Numbers(i int) declare @i int set @i = 1 -- loop to insert numbers while @i <= 100 begin insert into #Numbers(i) values(@i) set @i = @i + 1 end -- display numbers select * from #Numbers drop table #Numbers
Exercise 4.7
Stored procedure sp_spaceused can return information about the space used by a database object. Collect the names of all tables in the Asset database using:
select name from sysobjects where xtype = 'U'
and then loop through them to display space information to users.
Exercise 4.7 Solution
Use the following code:
Create Procedure prSpaceUsedByTables_1 -- loop through table names in current database -- display info about amount of space used by each table As Set nocount on
SQL Server 2000 Stored Procedure Programming
declare @MaxCounter int, @Counter int, @TableName sysname Create table #Tables ( Id int identity(1,1), TableName sysname) -- collect table names insert into #Tables(TableName) select name from sysobjects where xtype = 'U' -- prepare loop Select @MaxCounter = Max(Id), @Counter = 1 from #Tables
while @Counter <= @MaxCounter begin -- get table name select @TableName = TableName from #Tables where Id = @Counter -- display space used exec sp_spaceused end drop table #Tables @TableName set @Counter = @Counter + 1
This solution is not perfect. The result is not a single resultset but one resultset per table. You can find a better solution in Exercise 10.2.
Appendix B:
Solutions to the Exercises
Exercise 4.8
Create a stored procedure that lists orders scheduled for today with a status set to 1.
Exercise 4.8 Solution
Use the following code:
Create Procedure prListOrdersScheduledForToday -- List Orders with status = 1 scheduled for today As set nocount on SELECT [Order].OrderId, [Order].OrderDate, Contact.FirstName + ' ' + Contact.LastName [Ordered By], Location.Location, [Order].Note, OrderType.OrderType, OrgUnit.OrgUnit, Contact1.FirstName + ' ' + Contact1.LastName AS [Assigned To] FROM [Order] INNER JOIN Contact ON [Order].RequestedById = Contact.ContactId INNER JOIN OrderType ON [Order].OrderTypeId = OrderType.OrderTypeId INNER JOIN Location ON [Order].DestinationLocationId = Location.LocationId INNER JOIN OrgUnit ON [Order].VendorOrgUnitId = OrgUnit.OrgUnitId AND Contact.OrgUnitId = OrgUnit.OrgUnitId INNER JOIN Contact Contact1 ON [Order].AssignedToId = Contact1.ContactId WHERE [Order].TargetDate Between Convert(varchar, GETDATE(), 101) AND Convert(varchar, DateAdd(d, 1, GETDATE()), 101) AND ([Order].OrderStatusid = 1) return
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