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WHERE birthdate LIKE 60' ICS214A. Notes 10. 6. Example: Parse Tree ... name MovieStar birthDate 60' ICS214A. Notes 10. 7. Example: Logical Query Plan ...
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MovieStar(name, address, gender, birthdate) And there is an index on MovieStar.name ... SELECT birthdate. FROM StarsIn, MovieStar. WHERE title = 'King Kong' AND ...
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a) Find the address of MGM studios. b) Find Sandra Bullock's birthdate. ... b) SELECT birthdate FROM moviestar WHERE name = Sandra Bullock' ...
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Future Jobs. Look at the Pictures and Guess Each Career! Easy guess!! NANNY. MOVIESTAR! TRAVEL GUIDE. MUSICIAN. DOORMAN! DENTIST. Guess this one... LIFE GUARD! ...
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Mozart Rondo. From A Little Night. Use mouse to advance s. Easy guess!! NANNY? MOVIESTAR! ... PowerPoint Slide Shows are the latest Craze on the net. ...
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The Query Compiler Parses SQL query into parse tree Transforms parse tree into expression tree (logical query plan) Transforms logical query plan into physical query plan
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Movie(title, year,length, inColor) StarsIn(movieTitle, movieYear, starName) ... Q-2: Find all the movie stars who earn at least $10,000,000. 12. Solution #2 - 2 ...
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Leaf will be the view. Queries Involving Views (2) ... for each view-leaf, the root of the ... statement_id Unique identifier for each execution plan ...
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... b), S(b,c), T(c,d) the first query can not be transformed into the second: (Why? ... If StarsIn is stored, then for the projection we have to scan the relation. ...
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CS 245: Database System Principles Notes 6: Query Processing Hector Garcia-Molina Query Processing Q Query Plan Example Select B,D From R,S Where R.A = c ...
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The schema specifies whether null is allowed for each attribute. NOT ... The 'trichotomy law' does not hold! SELECT * FROM Person. WHERE age 25 OR age = 25 ...
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Ford Mustang. P1. Color. Name. Product no - The statement queries a relational database. ... Ford Mustang. Mercedes SLK. Name. Result. Original table. IST 210 ...
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FROM Movie. WHERE studioName = 'Disney' AND year = 1990; ... Which Disney movies are after 1970 or have length greater than 90 mins? SELECT title ...
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... total sales for the entire database: Q: Find total sales of ... Movie(title, year, ... the year of each star's first movie. Q: Find the span of each star's ...
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16.2.Algebraic Laws for Improving Query Plans
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Q: What about double quotes? A: Can't be used in place of single quotes ... Movie (title, year, director, length) Q: Find titles that are titles of multiple movies ...
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Aggregation op applied to rows in group, not to all rows in table ... Another grouping/aggregation e.g. Movie(title, year, length, studioName) ...
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Ford Mustang. P1. Color. Name. Product no - The statement queries a object-oriented database ... Ford Mustang. String. Result. Original table. Mercedes SLK ...
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Oracle. Labs ECS 242, 342, 360. You can ... oracle username is identical to the UNIX username. ... VALUES('Pretty Woman', 1990, 120, 'C', 'Disney', 234) ...
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Carrie Fisher. Birthday. Gender. Address. Name. 7/7/77. M. 789 Palm ... Carrie Fisher. Birthday. Gender. Address. Name. Relation R S. Relation R S. 8/8/88. M ...
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oracle username is identical to the UNIX username. initial oracle password is the student ... VALUES('Julia Roberts', '123 Billings Rd.', 'F', '23-Feb-1963' ...
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Movie(title, year, length, inColor, studioName, producerC) ... String constants are surrounded by single quotes. studioName = 'Disney' ...
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M.P. Johnson, DBMS, Stern/NYU, Sp2004. 1. C20.0046: Database Management Systems ... Orthodox SQL has set operators: UNION, INTERSECT, EXCEPT. And bag operators: ...
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Title: What is a DBMS? Author: thomo Last modified by: Alex Thomo Created Date: 9/6/2000 5:55:27 PM Document presentation format: On-screen Show Company
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Convert SQL query to a parse tree. Semantic checking: attributes, relation names, types ... Convert Parse Tree to Relational Algebra ...
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Referential Integrity checks, Triggers and Assertions Examples from Chapter 7 of Database Systems: the Complete Book Garcia-Molina, Ullman, & Widom
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Example: Parse Tree Query SFW SELECT SelList FROM FromList WHERE Condition ... 16.3 Parse tree - logical query plan. 16.4 Estimating result sizes ...
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Query Execution Optimizing Performance
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Title: CS206 --- Electronic Commerce Author: Jeff Ullman Last modified by: xiaying Created Date: 3/23/2002 8:14:09 PM Document presentation format
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Those estimation formulas covered so far might not be accurate enough ... for each update on R, increment/decrement the corresponding bucket frequencies ...
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Star Wars. Faye. King Kong. Watts. King Kong. starName. movieTitle. Issues: ... Star wars. movieYear. movieTitle. Smaller schemas always good ???? Desiredata. No sets ...
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CREATE TABLE Hotel ( room_nbr INT NOT NULL, arrival_date DATE NOT NULL, ... We want to add the constraint that reservations do not overlap. Exercise Hotel Stays ...
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Tuples are similar to records or 'structs' in C/C ... be born in the new millenium, their birthdates will be lexicographically less than 980601' ...
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Database Systems II Query Compiler
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Almost the same as for single-relation queries: ... Imagine one tuple-variable for each relation in the FROM clause. ... to use two copies of the same relation. ...
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Makes access more efficient if you are doing several operations on the ... 'Datastore.inc' contains a string we use to connect to Hollywood.mdb. Datastore.inc ...
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Subqueries Example Find the name of the producer of Star Wars . Movie(title, year, length, inColor, studioName, producerC) MovieExec(name, address, cert, netWorth)
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Cost based transformations. Initial logical query plan. Two ... The (estimated) size of a=10(R) is. 5000/50 = 100. The (estimated) size ... bushy tree. Why Left ...
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Web browser - This is a program that runs on your local PC (client) ... Meg Ryan /B /HTML Interprets script code. Performs action. Fills in part of page ...
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Newcomers appreciate the small-scale-feeling, the safety and to have the ... Nicole Kidman lived at Ronnum in Varg n. Jalla! Jalla! ...
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... and. Optimization. Slides from Jeff Ullman's and Hector Garcia-Molina's lectures ... A bag (or multiset ) is like a set, but an element may appear more than once. ...
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If we want to not allow NULL's in a foreign key we must say so. ... constraint checking, we cannot insert anything into chicken and egg, because the ...
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search the space of physical plans. choose order of operations. complete ... StarsIn(title,year,starName) Movie(title,year,len,inColor,studioName) and a view ...
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Acting Videos on website. Height: 5'4' Weight: 103 lbs. Hair: Black. Eyes: Brown. Film ... Dance: Ballroom, Tap, Ballet, Jazz, Country Western, Hip Hop, Swing ...
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Left-Deep Trees and One Pass Algo. ... Left-Deep Trees and One Pass Algo. How much main memory space we need? Dynamic programming ...
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Title: Slide 1 Last modified by: Fain Butt Document presentation format: Custom Other titles: Times New Roman Arial WingDings LotusWP Type Default Design Slide 1 ...
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CS 245. Notes 6. 1. CS 245: Database System Principles. Notes 6: Query Processing. Steven Whang ... R A B C S C D E. a 1 10 10 x 2. b 1 20 20 y 2. c 2 10 30 z 2 ...
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From Beers(name, manf) and Likes(drinker, beer), find the name and manufacturer ... WHERE drinker = Fred'); 14. STEM. PNU. The Exists Operator ...
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Not expressible directly by users, but used in database ... literal: atom or negated atom. clause: a disjunction ... negated atom is allowed to occur only ...
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Give all the producers of movies in which Julia Roberts stars. ... IN (SELECT movieTitle, movieYear FROM StarsIn WHERE starName = 'Julia Roberts' ...
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SQL: Constraints and Triggers Chapter 6 Ullman and Widom Certain properties we d like our database to hold Modification of the database may break these properties
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Some blocks are pinned. They can not be written back to disk until unpinned. Pinning is done for performance reasons. Make sure not to follow dangling pointers. ...
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Read write records, scan relations. Get page containing tuples. Read/write file pages ... simple to implement using a scan. relation scan. index scan ...
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SQL: Constraints and Triggers Chapter 6 Ullman and Widom Certain properties we d like our database to hold Modification of the database may break these properties
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However, there are points where estimating the cost both ... We have, of course, many possible join orders. Does it matter which ... to join Rl R2 ... Rn ...
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