1. Thousand Song Database Fix
1)
Afterreviewingthe database thatwaspresentedtome Icame across a numberof problems
associatedwithunorganizeddata.Irealizedthere isMore thanone song inan album;whichwouldbe
more or lessaccurate formost albumspublished.However,beingin anorganizeddatabase byhaving
the currentlylistedsongsaswell asalbumsrepresentmanyproblems.If youwere tolookspecificallyfor
a song butonlyrecall the albumtitle;bylookingupthe albumtitle youwill come acrossatleasttento
twelve songs,youwouldneedtosiftthroughtofindyourspecificone.Justaswell if youfeltthe needto
take off the albumtitle butperhapskeepafew goodsongs youenjoyedunfortunatelythe wayMySQL
worksyouwouldundoubtedlyerase the album’stitle andsongsassociatedwithit.Finally,there are
quite a numberof columnsthatdescribe the songas well asa numberof columnsthatdescribe the
album.Thisby itself isafundamentallyflawfororganizeddata;byhavingmultipleentitiesand
attributestogetherinone table makescategorizingandupdatingadatabase notonlydifficultbutin
some casesimpossible.
Anotherproblemsimilartothe above conflictinvolvesmore thanone albumcreatedbyan
artist.Thisdatabase showsmultiple albumswiththe same artists.Fairlycommonforanartistto have
more than one albumhoweverincreatinganorganizeddatabase thisisalsoafundamentallyflaw.If you
wantedtosearch for a specificsongtitle butonlyrecall the artistswhocreatedthe song;ratherthan a
narrow resultyoursearch parameters,youwouldbe presentedwithavastamountof songtitlesand
albums.Bycreatingseparate tablessortingoutartistand songtitle findingaspecificsongorartist would
make the resultmuchmore narrowand better.
Andfinallythe genre columnisveryvastandwithtwothousandsongsonlya few genresare
present.Thisisa massive problemthatcancreate terrible outcomesif notproperlyfixed.If youdecided
one day youare sickof rock musicand decide todelete itfromyourdatabase.Half of yourdatabase is
labeledgenre of rockmusic;youwill notonlyloose half yoursongsbutif throughthisdelete there were
a fewsongsevenif labeledrockyouenjoyed;well now itiscompletelygone.Furthermore,lookingfor
specificsongsorartistsbut usingthe genre wouldbe anightmare inthe results;consideringsomanyare
of differentgenres.Bymakingaseparate columnandusingprimaryand foreignkeysIcan make this
disasterintoa fixable anduseable searchoption;butalsoallow formore genrestobe addedwithease.

2. 2)
ThisdiagramI have createdshowswhat the new database will looklikeaswell asrelationships
betweenthe columns. Bymakingseparate attribute columnswe canmake queuingandupdating very
easy.
The main reasonI chose thisdiagramissimplyupdating,adding,searching,fixingamongother
actionsmakesthis veryeasy.Knowingeverysongcanhave differentgenres,albumsandartistsmake
not onlya 1 to manyrelationshipsonthe othertablesbutalsoallowsforeignkeystobe placedinthe
songtable fromall othertables.Bymakingprimarykeysthatare allowingeachcolumnnumberedin
each table Iam allowingeachbitof informationlabeledwithaspecificIDof itsown.Havingthat makes
all the informationinthisdatabase unique,easilyidentifiable andusefulforall the actionsmentioned
above.
Song
song_id (primary key)
song_title
time_mins
number_of_plays
artist_id (foreign key)
album_id (foreign key)
Artist
artist_id (primary_key)
name
Album
album_id (primary key)
album_title
year
genre

3. 3)
CREATE TABLE Song
( song_IdintNOT NULL Auto_increment,title varchar(50) NOTNULL, length_minstime(5),
number_of_playsint(3),PRIMARYKEY(song_Id) )
AlterTable Song
ADD columnartist_idintnotnull
AlterTable song
Addcolumnalbum_idintnotnull
CREATE TABLE Artist
( artist_idintNOT null Auto_Increment,name varchar(100),PRIMARYKEY (artist_id) )
CREATE TABLE Album
( album_idintNOTnull Auto_increment,title varchar(100),yearint(4),genre varchar(4), PRIMARYKEY
(album_id) )
4)
INSERT INTOSongVALUES ("heartbreak","3:20","10",NOTnull)
INSERT INTOArtistVALUES("RockyMountaint",NOTnull)
INSERT INTOAlbumVALUES("Heavenful", 2012, rock, NOT null)
5)
INSERT INTOSong(title,time_mins,number_of_plays) SELECTsong,time,playsFROMmusic
INSERT INTOArtist(name) SELECTdistinctartistFROMmusic
INSERT INTOAlbum(title,year,genre) SELECTdistinctalbum, year,genre FROMmusic
Update Song SetSong.album_id=(Selectdistinctalbum_idfromAlbum, musicwhereAlbum.album_id=
music.albumandSong.title =music.song)
Update Song SetSong.artist_id=(Selectdistinctartiis_idfromArtist,musicwhere Artist.name =
music.artistandSong.song_id=music.song)