SQL 2 - Gettting Data Into a DB

8/18/2019 SQL 2 - Gettting Data Into a DB

1/23

CIS 360:

Business Database Concepts:SQL – Putting Information Into aDatabase

Yili (Kevin) Hong

[email protected]://my.wpcarey.asu.edu/directory/peope/pro!e.c"m#

mailto:[email protected]:[email protected]


2/23

*ur reationa database

•

+ series o" tabes• ,in-ed together through

primary/"oreign -ey reationships


3/23

o create a database•

e need to de!ne – he tabes

– he !eds coumns1 within those tabes

– he data types o" those !eds

• here are S2, commands that do each o" thosethings

•

So ets assume that our database didnt e4istand we needed to create the tabes

C5+ 7D++B+S8SC9+; * ?ISS

databaseAname


4/23

C5+ statement create atabe1

C5+ +B, schemaAname.tabeAname coumn>ame' datatype ,,* >,,coumn>ame% datatype ,,* >,,

5I+5E FE Fey>ame1 1GItem Description

schemaAname he schema that wi contain the tabe

tabeAname he name o" the tabe

coumn>ame he name o" the !ed

datatype he datatype o" the !ed

,,*>,,

hether the !ed can be empty i.e. nu1he ame he name o" the !ed that wi serHe as theprimary -ey


5/23

4ampe: Creating the Customer abe

C5+ +B, orderdb.Customer

CustomerID I> >* >,,

=irst>ame +5C9+5(&1 >,,

,ast>ame +5C9+5(&1 >,, City +5C9+5(&1 >,,

State +5C9+5%1 >,,

Jip +5C9+5'01 >,, 5I+5E FE CustomerID1 1G

CustomerCustomerID

=irst>ame

,ast>ame

CityState

Jip

Based on this SQL statement:• he ony reKuired !ed is CustomerID L the rest can be e"t

ban-.• CustomerID is de!ned as the primary -ey.

5emember yourschema wi use your

m x yS2, IDi.e.mMMMorderdb.Customer

1


6/23

,oo-ing at the NnewO Customertabe

Column

name

Data type

CustomerID I>

=irst>ame +5C9+5(&1

,ast>ame +5C9+5(&1

City +5C9+5(&1

State +5C9+5%1

Jip +5C9+5'01 C u

s t o m e r

he databasemanagement systemstores this in"ormation

about the tabeIts separate "rom thedata in the tabe i.e.Customer in"ormation1

his is caedmetadata L Ndataabout dataO


7/23

Data types• ach !ed can contain diPerent types o" data

• hat must be speci!ed when the tabe iscreated

• here are many data typesG were ony goingto coHer the most important onesData type Description 4ampes

I> Integer 3 Q'0

DCI+,nm1 Decima n $ tota digitsm$ digits to the right o" thedecima point1

3.%3 3%1 3.'('&M 6&1

+5C9+5n1 String numbers andetters1

9eo I i-e piRRa yS2,

D+I Date/ime or Tust date1 %0''Q0MQ0' 'U:3&:00%0''Q0(Q'%

B**,+> Booean Haue 0 or 'So why do you thin- we de!ned NJipO as a

+5C9+51 instead o" an I>#


8/23

So bac- to our C5+statement

C5+ +B, orderdb.Customer

CustomerID I> >* >,, Firstame !"#CH"#($%) &LL '

,ast>ame +5C9+5(&1 >,, City +5C9+5(&1 >,,

State !"#CH"#() &LL '

Jip +5C9+5'01 >,, 5I+5E FE CustomerID1 1G

=irst>ame can be astring o" up to (&

etters and numbers.

hy $%* +t,s theSQL de-ault.

State can be a string

o" up to % etters andnumbers


9/23

statements

C5+ +B, orderdb.V*rderV

*rder>umber I> >* >,, *rderDate D+I >,,

CustomerID I> >,,

5I+5E FE *rder>umber1 1G

C5+ +B, orderdb.roduct

roductID I> >* >,,

roduct>ame +5C9+5(&1 >,,

rice DCI+,&%1 >,,

5I+5E FE roductID1 1G

/rder*rder>umber

*rderDate

CustomerID

0rodu1t

roductID

roduct>ame

rice

DCI+,& %1 indicates price can no arger thanMMM.MM.


10/23

5emoHing tabes

D5* +B,schemaAname.tabeAnameG

4ampe: D5* +B,orderdb.CustomerG

• his deetes the entire tabe and

a data• Its a pain to get it bac- i" you can

at a1

Becare"u

Ch i b


11/23

Changing a tabesmetadata

+,5 +B, schemaAname.tabeAname"DD coumnAname datatype ,,*>,,G

or

+,5 +B, schemaAname.tabeAnameD#/0 C/L&2 coumnAnameG

or

+,5 +B, schemaAname.tabeAnameCH"34 C/L&2 odAcoumnAnamenewAcoumnAname datatype,,* >,,G

+dds acoumn tothe tabe

5emoHes acoumn"rom the

tabe

Changes acoumn inthe tabe


12/23

+n e4ampe o" each

+,5 +B,orderdb.roduct+DD C*,>Vanu"acturerV+5C9+5(&1 >,,G

+,5 +B,orderdb.roduct D5*

C*,> Vanu"acturerG

+ddsWanu"acturer

coumn to

roduct tabe

5emoHes

Wanu"acturercoumn "romroduct tabe


13/23

+n e4ampe o" each

+,5 +B,orderdb.roduct C9+>XC*,> rice Saesrice

DCI+,6%1 >,,

+,5 +B,orderdb.roduct C9+>XC*,> rice riceDCI+,6%1 >,,

Changes name o"rice coumn inroduct tabe to

Saesrice and its

data type toDCI+,6%1

Changes data type o"rice coumn inroduct tabe to

DCI+,6%1 buteaHes the name

unchanged.


14/23

+dding a ro5 to a tabeHersus coumns1

• + change in the tabestructure

• Done using +,5 +B,

+ddinga

coumn

• + change in the tabe

data• Done using I>S5

I>*

+ddinga row


15/23


16/23

I>S5 e4ampe

I>S5 I>* orderdb.CustomerCustomerID =irst>ame ,ast>ameCity State Jip1 +,S '00& YChrisYYaubY YrincetonY Y>ZY Y0M'%0Y1G

Customer+D Firstame Lastame City State 9ip

'00' Xreg 9ouse rinceton >Z 0M'%0

'00% ,isa Cuddy ainsboro >Z 0M'%3

'003 Zames ison ittsgroHe >Z 0M'%'

'00( ric =oreman arminster + 'M'''

;;% Chris 6au< 0rin1eton = ;>;

B+3 6+0: ote that 7eld names are surrounded


17/23

Changing a row

D+ schemaAname.tabeAname Scoumn>ame'$Haue'coumn>ame%$Haue% 95 conditionG

•

D+ VtestV.VproductV SVroduct>ameV$Y9oney >ut CheeriosYVriceV$Y(.&0Y 95 VroductIDV$Y%%&'YG

Item Description

schemaAname he schema that contains the tabe

tabeAname he name o" the tabe

coumn>ame he name o" the !ed

Haue he data Haue "or the !ed

condition + conditiona statement to speci"y the recordswhich shoud be changed


18/23

D+ e4ampe

D+ orderdb.roduct Sroduct>ame$Y9oney >ut CheeriosYrice$(.&0 95 roductID$%%&'G

0rodu1t+D

0rodu1tame

0ri1e

%%&' Cheerios 3.MM

%%)% Bananas '.%M

%&0& ggo a[es %.MM 0 r o d u 1 t

0rodu1t+D

0rodu1tame

0ri1e

% Honey utCheerios

$.%;

%%)% Bananas '.%M

%&0& ggo a[es %.MM

6he ?sa-est 5ay to &0D"64 is onere1ord at a time'


19/23

Changing mutipe rows

D+ orderdb.Customer SCity$YCherry 9iY 95State$Y>ZYG

Customer+D

Firstame

Lastame

City State

9ip




'00( ric =oreman arminster

+ 'M'''

Customer+D

Firstame

Lastame

City State

9ip

;; 3reg House CherryHill

= ;>;

;; Lisa Cuddy CherryHill

= ;>E

;;E =ames ilson CherryHill

= ;>

Be1are-ul8

Eou can do

a ot o"damagewith a

Kuery i-ethis


20/23


21/23

D, e4ampe

D, =5* orderdb.Customer95 CustomerID$'00(G











22/23

Deeting mutipe rows

D, =5*orderdb.Customer 95CustomerID\'00%G









+ H o i

d

d o i n

g

t h i s S


23/23

*ne more D, e4ampe

D, =5* orderdb.Customer95 State$Y>ZY +>D Jip$Y0M'%'Y


'00' Xreg 9ouse rinceton >Z 0M'%0'00% ,isa Cuddy ainsboro >Z 0M'%3







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SQL 2 - Gettting Data Into a DB