( Boats)) ( Tempsids, bid. sname. Boats. Boats. Boats. (Reserves)/ > Reserves. Interlake' Sailors) ...

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Download "( Boats)) ( Tempsids, bid. sname. Boats. Boats. Boats. (Reserves)/ > Reserves. Interlake' Sailors) ..."

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1 sname rating age Dustin Brutus Lubber Andy Rusty Horatio Zorba Horatio Art Bob day /10/ /10/ /8/ /7/ /10/ /6/ /12/98 Sailors 1 2 ( Tempred, ( ( ) > )) color ' 64 day 10/10/98 11/10/ /8/98 10/7/98 11/12/98 day /10/ /10/ /8/ /7/ /10/ /6/ /12/98 3 ( Tempgreen, ( ( ) > )) color ' green' 74 day 10/8/98 11/6/ /8/98 day /10/ /10/ /8/ /7/ /10/ /6/ /12/98 4 sname (( Tempred Tempgreen ) > Sailors ) sname rating age Dustin Lubber sname Dustin Lubber sname rating age Dustin Brutus Lubber Andy Rusty Horatio Zorba Horatio Art Bob Sailors 5 ( Temps, ()/ ( )), sname ( Temps> Sailors)... Interlake / ( ( )) bname ' Interlake' 6 1

2 ( Temps, ()/ ( )), day /10/ /10/ /8/ /7/ /10/ /6/ /12/ sname ( Temps > Sailors) sname rating age Dustin Brutus Lubber Andy Rusty Horatio Zorba Horatio Art Bob Sailors sname rating age Dustin sname Dustin 7 8 Interlake... day /10/ /10/ /8/ /7/ /10/ /6/ /12/98 / ( ( )) bname ' Interlake' Suppliers Parts Catalog sname address 14 giant tokyo 29 hawk fukuoka dragon nagoya 33 tiger osaka 95 carp hiroshima pid pname color 102 red 104 green 106 blue 109 red Suppliers ID sname address Parts pid pname color pid cost Catalog pidcost 10 Suppliers( integer, sname char(16), address char(20)) Catalog( integer, pid integer, cost real) Suppliers ID sname address Parts pid pname color Catalog pidcost Suppliers( integer, sname char(16), address char(20)) Catalog( integer, pid integer, cost real) address hiroshima Suppliers sname sname ( ( )) address ' hiroshima ' Suppliers (red) Parts Suppliers sname sname ( (( ( ( Parts ))) > Catalog ) > Suppliers pid color ' sname ( ( Parts > Catalog > )) color ' Suppliers (green) Parts Suppliers (( ( ( Parts ))) > Catalog ) pid color ' red' or color 'green' )

3 Suppliers( integer, sname char(16), address char(20)) Catalog( integer, pid integer, cost real) Parts Suppliers ( R 1, ( ( ( Parts )) > Catalog )) pid color ' ( R 2, ( ( ( Parts )) > Catalog )) pid color ' green' R1 R2 PartsSuppliers ( Catalog )/ ( ( Parts )), pid pid color ' Suppliers( integer, sname char(16), address char(20)) Catalog( integer, pid integer, cost real) 29 Suppliers sname cost 100Parts pid cost 100Parts pname cost 100Parts Suppliers sname A4 Students( integer, sname char(16), age integer) Enrolled( integer, cid integer, grade integer) Courses(cid integer, cname char(16), teacher char(16)) Students sname age Enrolled cid grade Courses cid cname teacher A4 Students( integer, sname char(16), age integer) Enrolled( integer, cid integer, grade integer) Courses(cid integer, cname char(16), teacher char(16)) age 20sname grade D sname cname teacher sname sname cname cid Data Description Language, DDL CREATE TABLE Students ( char(5), sname char(20), login char(40), age integer, gpa real) Data Manipulation Language Data Description Language SQL-99 SQL 2009/2/ Data Manipulation Language, DML DB SELECT sname gpa WHERE = 253 DDL DML SQL DB 18 3

4 Students sname login age gpa 253 ueto Students sname login age gpa 253 ueto Courses cid cname credit AM Schema Students ( char(5), name char(16), login char(32), age integer, gpa real ) Students( char(5), sname char(20), login char(40), age integer, gpa real) Courses(cid char(6), cname char(20), credits integer) 21 Students CREATE TABLE Students ( CHAR(20), name CHAR(20), login CHAR(10), age INTEGER, gpa REAL) Enrolled CREATE TABLE Enrolled ( CHAR(20), cid CHAR(20), grade CHAR(2)) cid grade CHAR(n) VARCHAR(n) INTEGER REAL

5 DROP TABLE Students ALTER TABLE Students ADD COLUMN firstyear integer null value Students SELECT FROM WHERE > > > Smith FROM > > AND, OR, NOT SELECT name, login WHERE age = 18 name Jones Smith login jones@cs smith@ee SELECT > FROM σ π Students Students Smith smith@ee Smith smith@ee SELECT name, login name Jones Smith Smith SQL login jones@cs smith@ee smith@ee 29 SELECT * WHERE age=18 π 30 5

6 > name = ' age > 18 Students. = Enrolled. op op op =, >,, >, >=, = AND,OR,NOT name = ' ' OR name = ' ' AND age > 20 NOT (name = ' ' AND age > 20 INSERT INTO Students (, name, login, age, gpa) VALUES (53688, Smith, smith@ee, 18, 3.2) 32 INSERT INTO Students (name,, login, age, gpa) VALUES ( Smith, 53688, smith@ee, 18, 3.2) INSERT INTO Students VALUES (53688, Smith, smith@ee, 18, 3.2) INSERT INTO Students (, name) VALUES (53688, Smith ) Smith null value DELETE WHERE name = Smith where Smith where UPDATE Students SET age = age + 1 WHERE name = Smith where Smith smith@math Smith smith@ee where

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ΚΕΡΑΜΟΠΟΥΛΟΣ ΕΥΚΛΕΙΔΗΣ Πίνακας Πεδίο Τύπος Κύριο κλειδί Αναφορική ακεραιότητα οντοτήτων Ξένο κλειδί Αναφορική ακεραιότητα δεδομένων Δρ. Κεραμόπουλος Ευκλείδης 2 ΚΥΡΙΟ ΚΛΕΙΔΙ ΦΟΙΤΗΤΗΣ ΑΜ CHAR(5) ΟΝΟΜΑ VARCHAR(20)