SQL Adv Lab

1

Unit 3

1. Using the authors table, create a single column label output as follows making sure there is no possibility of a data modification taking place:

Johnson White

10932 Bigge Rd.

Menlo Park CA 94025

Marjorie Green

309 63rd St. #411

Oakland CA 94618

Cheryl Carson

589 Darwin Ln.

Berkeley CA 94705

Michael O'Leary

22 Cleveland Av. #14

San Jose CA 95128

Dean Straight

5420 College Av.

Oakland CA 94609

Meander Smith

10 Mississippi Dr.

Lawrence KS 66044

Abraham Bennet

6223 Bateman St.

Berkeley CA 94705

Ann Dull

3410 Blonde St.

Palo Alto CA 94301

Burt Gringlesby

PO Box 792

Covelo CA 95428

Charlene Locksley

18 Broadway Av.

San Francisco CA 94130

Morningstar Greene

22 Graybar House Rd.

Nashville TN 37215

Reginald Blotchet-Halls

55 Hillsdale Bl.

Corvallis OR 97330

Akiko Yokomoto

3 Silver Ct.

Walnut Creek CA 94595

2

Unit 4

1. Create a stored procedure that returns all of the title IDs, title, and type from the titles table. 2. Enhance this stored procedure to only return the titles for the type you specify. Make sure to return a usage

statement to the user if a type is not specified.

3. Enhance this procedure to provide a default value if no value is given. Remove the usage statement. 4. Enhance this procedure to return the total sales for a given type of book directly into a local variable and create

a batch to test this.

5. Modify this procedure to only return the total sales if a type of business is passed into the proc. 6. Enhance this procedure to return the total sales if the type passed in was business or return a message to the user

that says Not a type of business if the type passed was not business

7. Enhance the procedure by adding a documentation header 8. Enhance the procedure by adding appropriate error handling 9. Create a second procedure to run the labels created in exercise 1 of Unit 9. Include the ability to pass in a state

to get just those authors that live in that state. If no state is passed, return all authors.

10. Using a select into, return only those title types that have an average price > $15

3

Unit 5

1. Create a trigger that maintains referential integrity for the sales table a. If a stor_id is inserted, validate it against the sales table b. If its invalid send an appropriate message and rollback the transaction

2. Create an insert, delete, update trigger to derive duplicate data in the salesdetail table a. Maintain the data in the titles.total_sales whenever data in the salesdetail.qty column changes

3. Create a trigger for the publishers table that displays the contents of the inserted and deleted tables a. Show the contents of the inserted/deleted tables for each of the three different DML statements and rollback

the transaction

4

Unit 3 Solutions

1. set nocount on

declare @name char(80),

@address char(50),

@city char(60)

declare cur_mycursor cursor for

select rtrim(ltrim(au_fname)) + ' ' + rtrim(ltrim(au_lname)), address,

rtrim(ltrim(city)) + ' ' + rtrim(ltrim(state)) + ' ' + rtrim(ltrim(zip))

from authors

for read only

open cur_mycursor

fetch cur_mycursor into @name, @address, @city

while @@fetch_status = 0

begin

print @name

print @address

print @city

print ' '


end

close cur_mycursor

deallocate cur_mycursor

set nocount off

Unit 4 Solutions

1. create procedure myproc as

select title_id, title, type from titles

go

2. drop procedure myproc

go

create procedure myproc (@type char(10) = null) as

if @type is null

begin

print 'Usage: exec myproc type'

return

end


where type = @type

go


go

create procedure myproc (@type char(10) = 'business') as


where type = @type

go

5


go

create procedure myproc (@type char(10) = 'business', @total_sales money output) as

select @total_sales = (select sum(ytd_sales) from titles where type = @type)

go

declare @total_sales money

exec myproc 'business',@total_sales output

select @total_sales

go


go


if @type = 'business'

begin


end

return

go


exec myproc 'popular_comp',@total_sales output

select @total_sales


go



begin


end

else

print 'Not a type of business'

return

go


exec myproc 'popular_comp',@total_sales output

select @total_sales

7. drop prcedure myproc

go


/********************************************************************************/

/* Stored procedure myproc */

/* Creation Date: */

/* Author: */

/* */

/* Purpose: */

/* Receives an input of type of book and outputs the total year to date */

/* sales for that type */

/* */

/* Input Parameters: */

/* @type The type of book */

6

/* */

/* Output Parameters: */

/* @total_sales The total sales for that type */

/* */

/* Return Status */

/* */

/* Usage: */

/* declare @total money */

/* exec myproc type, @total output */

/* */

/* Local Variables: */

/* */

/* Called by: */

/* */

/* Calls: */

/* */

/* Data Modifications: */

/* */

/* Updates */

/* Date Author Changes */

/********************************************************************************/


begin


end

else


return

go

8. declare @error int,

@rows int


begin


select @error = @@error, @rows = @@rowcount

if @error 0

begin

raiserror('An error has occured',16,-1)

return

end

if @rows = 0

begin

raiserror('No rows matched criteria',16,-1)

return

end

end

else


return

go

9. create procedure myotherproc (@state char(2)=null)

as

7

set nocount on

declare @name char(80),

@address char(50),

@city char(60)

if @state is null




from authors

for read only

else




from authors where state = @state

for read only

open cur_mycursor


while @@fetch_status = 0

begin

print @name

print @address

print @city

print ' '


end

close cur_mycursor

deallocate cur_mycursor

set nocount off

return

go

10. create procedure myproc

as

select type, avg(price) as AvgPrice into #mytemptable from titles group by type

select * from #mytemptable where AvgPrice > 15

go

8

Unit 5 Solutions

1. create trigger ti_sales on sales

for insert

as

declare @num_rows int

select @num_rows = @@rowcount

if @num_rows = 0

return

if (select count(*) from stores s, inserted i where i.stor_id = s.stor_id) != @num_rows

begin

raiserror(30001,"Attempt to insert invalid stor_id")

rollback transaction

return

end

return

go

2. create trigger tiud_salesdetail on salesdetail

for insert, update, delete

as

declare @irows int,

@drows int

/* Return if no rows affected */

if @@rowcount = 0

return

select @irows = count(*) from inserted

select @drows = count(*) from deleted

begin transaction

/* Are there rows in inserted? */

if @irows != 0

begin

update titles set total_sales = isnull(total_sales,0) + (select sum(qty) from inserted where titles.title_id =

inserted.title_id)

if @@transtate = 2

begin


return

end

if @@transtate = 3

return

end

/* Are there rows in deleted? */

if @drows != 0

begin

update titles set total_sales = isnull(total_sales,0) - (select sum(qty) from deleted where titles.title_id =

deleted.title_id)

if @@transtate = 2

9

begin


return

end

if @@transtate = 3

return

end

commit transaction

return

go

3. create trigger tiud_publishers on publishers

for insert, update, delete

as

declare @ins_rows int,

@del_rows int

if @@rowscount = 0

return

select @ins_rows = count(*) from inserted

select @del_rows = count(*) from deleted

if @del_rows = @ins_rows

/* Trigger fired by update */

begin

print 'Trigger fired by update. Contents of inserted are:'

select * from inserted

print 'Contents of deleted are:'

select * from deleted


return

end

if @del_rows = 0 /*Trigger fired by insert */

begin

print 'Trigger fired by insert. Contents of inserted are:'





return

end

if @ins_rows = 0 /*Trigger fired by delete */

begin

print 'Trigger fired by delete. Contents of inserted are:'





return

end

return

10

go

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SQL Adv Lab