Database Systems: Concepts, Design and Applications

Fill in the Blanks

1.	A query processor transforms a ________ query into an ________ that performs the required retrievals and manipulations in the database.
2.	Execution plan is a series of ________ steps.
3.	In syntax-checking phase of query processing the system ________ the query and checks that it obeys the ________ rules.
4.	________ is the process of transforming a query written in SQL (or any high-level language) into a correct and efficient execution strategy expressed in a low-level language.
5.	During the query transformation process, the ________ checks the syntax and verifies if the relations and the attributes used in the query are defined in the database.
6.	Query transformation is performed by transforming the query into ________ that ...