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Exercise 2.2
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Create a stored procedure prListEquipment to return a list of equipment defined in the Equipment table of the Asset database.
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1. Open Enterprise Manager.
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Solutions to the Exercises
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2. Drill down to Stored Procedures in the Asset database. 3. Right-click any stored procedure and select New Stored Procedure from the pop-up menu. Enterprise Manager displays the Stored Procedure Properties dialog. 4. Type the following code for the stored procedure:
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CREATE PROCEDURE prListEquipment AS select * from Equipment
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5. Click Check Syntax to verify that the code is correct. 6. Click OK to store and compile the stored procedure.
SQL Server 2000 Stored Procedure Programming
Exercise 2.3
Change the stored procedure prListEquipment so that its resultset includes equipment type in the form of text. See the following diagram:
Exercise 2.3 Solution
1. Double-click prListEquipment in Enterprise Manager. 2. Change its code to the following
ALTER PROCEDURE prListEquipment AS select Equipment.*, EqType.EqType from Equipment inner join EqType on Equipment.EqTypeId = EqType.EqTypeId
3. Click OK to save the stored procedure.
Exercise 2.4
Execute the stored procedure prListEquipment.
Appendix B:
Solutions to the Exercises
Exercise 2.4 Solution
1. Open Query Analyzer. 2. Make sure that the current database is Asset. (If it is not, select the Asset database from the DB drop-down list of databases.) 3. Type the following code in the Query Pane:
exec prListEquipment
4. Optionally, select Query | Results in Grid to set the format of the result. 5. Execute the stored procedure (Query | Execute) and Query Analyzer returns a list of equipment (see Figure B-2).
Figure B-2.
Executing a stored procedure in Query Analyzer
SQL Server 2000 Stored Procedure Programming
CHAPTER 3. STORED PROCEDURE DESIGN CONCEPTS
Exercise 3.1
Create a stored procedure called prUpdateStatus to update the status field of a specified record in the Inventory table.
Exercise 3.1 Solution
prUpdateStatus is a simple stored procedure with two input parameters and an Update statement:
CREATE PROCEDURE prUpdateStatus @InventoryId int, @StatusId int AS Update Inventory Set StatusId = @StatusId where InventoryId = @InventoryId
You can execute the stored procedure from Query Analyzer using the following code:
execute prUpdateStatus 121, 2
Exercise 3.2
Create a stored procedure called prListProperties to return a list of properties and their values for a specified Inventory item.
Exercise 3.2 Solution
prListProperties is a simple stored procedure with one input parameter and a Select statement; it joins two tables:
CREATE PROCEDURE prListProperties @InventoryId int
Appendix B:
Solutions to the Exercises
AS SELECT Property.Property, InventoryProperty.Value, Property.Unit FROM InventoryProperty INNER JOIN Property ON InventoryProperty.PropertyId = Property.PropertyId WHERE InventoryProperty.InventoryId = @InventoryId
You can execute the stored procedure from Query Analyzer using the following code:
Execute prListProperties 121
Exercise 3.3
Create a stored procedure to return a LeaseScheduleId for a specified asset.
Exercise 3.3 Solution
The prGetLeaseScheduleId stored procedure requires one input parameter and one output parameter.
Create Procedure prGetLeaseScheduleId @InventoryId int, @LeaseScheduleId int OUTPUT AS Select @LeaseScheduleId = LeaseScheduleId Where InventoryId = @InventoryIds
You can execute the stored procedure from Query Analyzer using the following code:
Declare @Result int Execute prGetLeaseScheduleId @LeaseScheduleId = @Result OUTPUT, @InventoryId = 121 Select @Result Result
SQL Server 2000 Stored Procedure Programming
Exercise 3.4
Create a stored procedure prTest_QA with a simple Select statement inside. Using just Query Analyzer, verify that it exists in the current database.
Exercise 3.4 Solution
Create the stored procedure and then use sp_stored_procedures to list all procedures in the database:
CREATE PROCEDURE prTest_QA AS SELECT * from Inventory go exec sp_stored_procedures go
Exercise 3.5
Using just Query Analyzer, obtain the code of prTest_QA.
Exercise 3.5 Solution
Use sp_helptext to list the code for the stored procedure:
exec sp_helptext prTest_QA
Exercise 3.6
Using just Query Analyzer, view dependencies of prTest_QA.
Appendix B:
Solutions to the Exercises
Exercise 3.6 Solution
Use sp_depends to list dependent and depending objects for the stored procedure:
exec sp_depends prTest_QA
Exercise 3.7
Using just Query Analyzer, rename prTest_QA to up_Test_QA.
Exercise 3.7 Solution
Use sp_rename to rename the stored procedure:
exec sp_rename prTest_QA, up_Test_QA
Exercise 3.8
Using just Query Analyzer, delete up_Test_QA.
Exercise 3.8 Solution
Use DROP PROCEDURE to delete the stored procedure:
DROP PROCEDURE up_Test_QA
CHAPTER 4. BASIC TRANSACT-SQL PROGRAMMING CONSTRUCTS
Exercise 4.1
Which datatypes can store strings and what are the differences among them
SQL Server 2000 Stored Procedure Programming
Exercise 4.1 Solution
Strings are usually stored in variables or columns of char, varchar, or text datatypes. In SQL Server 2000, as with SQL Server 7.0, it is possible to store strings with Unicode characters in Nchar, Nvarchar, and Ntext. Char and Nchar are designed to store strings of fixed length. When a shorter string is assigned to them, SQL Server pads it with trailing spaces. Varchar and Nvarchar are designed for storing strings of variable sizes. The maximum length of Char and Varchar is 8,000 characters, and the maximum length of Nchar and Nvarchar is 4,000 characters (8,000 bytes). Text and Ntext can contain two billion and one billion characters respectively. A new feature of SQL Server 2000 is the sql_variant datatype. Objects of the sql_variant datatype can contain information internally using the structures of char, varchar, Nchar, or Nvarchar datatypes.
Exercise 4.2
Is it better to use decimal or real variables to store monetary values
Exercise 4.2 Solution
Decimal variables and columns are better suited for storing monetary values because they do not require conversion from the decimal to the binary system.
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