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Simplify the following query: SELECT ENAME, PNAME FROM EMP, ASG, PROJ WHERE (DUR > 12 OR RESP = "Analyst") AND EMP.ENO = ASG.ENO AND (TITLE = "Elect. Eng." OR ASG.PNO < "P3") AND (DUR > 12 OR RESP NOT= "Analyst") AND ASG.PNO = PROJ.PNO and transform it into an optimized operator tree using the restructuring algorithm.

Simplify the following query: SELECT ENAME, PNAME FROM EMP, ASG, PROJ WHERE (DUR > 12 OR RESP = "Analyst") AND EMP.ENO = ASG.ENO AND (TITLE = "Elect. Eng." OR ASG.PNO < "P3") AND (DUR > 12 OR RESP NOT= "Analyst") AND ASG.PNO = PROJ.PNO and transform it into an optimized operator tree using the restructuring algorithm.

Database Systems: Design, Implementation, & Management
Database Systems: Design, Implementation, & Management
12th Edition
ISBN:9781305627482
Author:Carlos Coronel, Steven Morris
Publisher:Carlos Coronel, Steven Morris
Chapter8: Advanced Sql
Section: Chapter Questions
Problem 59P
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Simplify the following query:

SELECT ENAME, PNAME

FROM EMP, ASG, PROJ

WHERE (DUR > 12 OR RESP = "Analyst")

AND EMP.ENO = ASG.ENO

AND (TITLE = "Elect. Eng." OR ASG.PNO < "P3")

AND (DUR > 12 OR RESP NOT= "Analyst")

AND ASG.PNO = PROJ.PNO

and transform it into an optimized operator tree using the restructuring algorithm.

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