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16.3 Parser to Logical Query Plans. 16.1. SQL(not RAE) Figure 16.2 select distinct movietitle from starsIn where starname in (select name from moviestar.

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Presentation on theme: "16.3 Parser to Logical Query Plans. 16.1. SQL(not RAE) Figure 16.2 select distinct movietitle from starsIn where starname in (select name from moviestar."— Presentation transcript:

1 16.3 Parser to Logical Query Plans

2 16.1. SQL(not RAE) Figure 16.2 select distinct movietitle from starsIn where starname in (select name from moviestar where birthdate like '%1974%'); NOTRAE=Relational Algebra NOT Expressible SQL

3 16.3. SQL/RAE of Figure select distinct movietitle from starsIn a, (select name from moviestar where birthdate like '%1996%') temp where a.starname = temp.name; RAE=Relational Algebra Expressible SQL

4 16.3Example16.19 Figure π movie title σ movieYear lile ‘%1996’ StarsIn This is the RAE SQL π name MovieStar  starname=name

5 16.3. SQL/RAE of Figure select movietitle from (select starname,movietitle From starsIn) a, (select name from moviestar where birthdate like '%1974%') b where a.starname = b.name;

6 16.3Example16.19 Figure π movie title σ movieYear lile ‘%1974%’ StarsIn This is the RAE SQL π name MovieStar  starname=name  starame, movie title

7 SQL in Figure Select distinct m1.movieTitle, m1.movieYear From StarsIn m1 Where m1.movieYear – 40 <= ( Select AVG(birthdate) From StarsIn m2, Moviestar s Where m2.starName=s.name AND m1.movieTitle = m2.movieTitle AND m1.movieyear = m2.movieyear );

8 SQL in Figure Select distinct m.movieTitle, m.movieYear From StarsIn m1, ( Select m2.movieTitle, m2.movieyear, AVG(birthdate) as ave From StarsIn m2, Moviestar s Where m2.starName=s.name Group by m2.movieTitle, m2.movieyear ) m Where m1.movieTitle = m.movieTitle and m1.movieYear – 40 <=ave;

9 γ m2.movieTitle, m2.movieyear,AVG(birthDate)  ave  m2.movietitle=m1.movietitle and m2.movietitle=m1.movietitle  m1.movieYear -40  abd π m1.movieYear m1.movieYear  StarsIn  m2,starname=s.name StaesIn MovieStar

10 γ m2.movieTitle, m2.movieyear,AVG(birthDate)  ave  m2.movietitle=m1.movietitle and m2.movietitle=m1.movietitle  m1.movieYear -40  abd π m1.movieYear m1.movieYear  StarsIn  m2,starname=s.name StaesIn MovieStar π m1.movieYear,m1.movieYear

11 γ m2.movieTitle, m2.movieyear,AVG(birthDate)  ave  m1.movieYear -40  abd π m1.movieYear m1.movieYear   m2,starname=s.name StaesIn MovieStar

12 γ m2.movieTitle, m2.movieyear,AVG(birthDate)  ave  m1.movieYear -40  abd π m1.movietitle m1.movieYear   m2,starname=s.name StaesIn MovieStar  m1.movietitle m1.movieYear

13 Lecture on Whiteboard Select PNAME, Sum (QTY) From Parts natural join Shipments Group by PNAME;

14 Lecture on Whiteboard  pname,SUM(qty) -->sum  (Natural Join) Shipments Parts  pname,SUM(qty) -->sum (Shipment  Parts)

15 Lecture on Whiteboard Select F.PNAME, Sum (F.QTY) as sum From ( Select PNAME, QTY FROM ( SELECT PNUM,PNAME From Parts) natural join ( Select PNUM, QTY From Shipments) )F Group by F.pname;

16  pname,MAX(qty) -->max   pname. qty   (Natural join)   π pnum,qty π pnum, pname  Shipments Parts


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