7. A “natural join" in a relational database takes two tables of information and combines entries fromthe tables that share a particular field. You can read more about this at Wikipedia. Interpret thetables below as sets of sets? For the Course Enrollment Table define A = {{A38182818, Spring2021,Math230, 01}, ..., {A56363631, Spring2021, Math454, 01}}, and for the Student Table defineB = {{Al, A81723653}, {Jo, A38182818}, {Su, A56363631}}.Course Enrollment TableStudent TableA38182818 | Spring2021 | Math230 | 01A81723653 | Spring2021 | Math35001AlA81723653A81723653Fall2020Math15204JoA56363631A38182818Fall2020Math33202SuA38182818A56363631 | Spring2021Math454 | 01(a) Construct the setC = {xUy : x € A, y E B, x N y # 0}.(b) Represent the resulting set C from part (a) as a table, similar to what you see above. Makesure to write down the table for C in a reasonably sorted order.(c) Why would you want to query the database for the set {x € C : Al e x}? Be specific. (Thiscorresponds to a “SELECT" statement from the “JOIN" of two tables in database query language.)

C = [ {A38182818,Spring2021,Math230,01,Su,A38182818},…

"natural join" in a relational database takes two tables of lnformation and combines entries from the tables that share a particular field. You can read more about this at Wikipedia. Interpret the tables below as sets of sets? For the Course Enrollment Table define A = {{A38182818, Spring2021, Math230,01}, ..., {A56363631, Spring2021, Math454, 01}}, and for the Student Table define B = {{Al, A81723653}, {Jo, A38182818}, {Su, A56363631}}. Course Enrollment Table Student Table A38182818 | Spring2021 A81723653 | Spring2021 Math230 01 Math350 01 Al A81723653 A81723653 Fall2020 Math152 04 Jo A56363631 A38182818 Fall2020 Math332 02 Su A38182818 A56363631 | Spring2021 Math454 01 (a) Construct the set C = {xUy : x € A, y E B,x N y # 0}. (b) Represent the resulting set C from part (a) as a table, similar to what you see above. Make sure to write down the table for C in a reasonably sorted order. (c) Why would you want to query the database for the set {x E C : Al E x}? Be specific. (This corresponds to a "SELECT" statement from the "JOIN" of two tables in database query language.)

"natural join" in a relational database takes two tables of lnformation and combines entries from the tables that share a particular field. You can read more about this at Wikipedia. Interpret the tables below as sets of sets? For the Course Enrollment Table define A = {{A38182818, Spring2021, Math230,01}, ..., {A56363631, Spring2021, Math454, 01}}, and for the Student Table define B = {{Al, A81723653}, {Jo, A38182818}, {Su, A56363631}}. Course Enrollment Table Student Table A38182818 | Spring2021 A81723653 | Spring2021 Math230 01 Math350 01 Al A81723653 A81723653 Fall2020 Math152 04 Jo A56363631 A38182818 Fall2020 Math332 02 Su A38182818 A56363631 | Spring2021 Math454 01 (a) Construct the set C = {xUy : x € A, y E B,x N y # 0}. (b) Represent the resulting set C from part (a) as a table, similar to what you see above. Make sure to write down the table for C in a reasonably sorted order. (c) Why would you want to query the database for the set {x E C : Al E x}? Be specific. (This corresponds to a "SELECT" statement from the "JOIN" of two tables in database query language.)

Database Systems: Design, Implementation, & Management

11th Edition

ISBN:9781285196145

Author:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel

Publisher:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel

Chapter10: Transaction Management And Concurrency Control

Section: Chapter Questions

Problem 1P

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