I need help with question 5.2-5.6 I cant get mysql command line running on my mac because I forgot mysql password.

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TextBook: database systems a practical approach to design implementation and management 6th

139 Chapter Summary ra is a (high-level) procedural lguage it can be used to tell the DBMS The new relation from one or more relations in the database. The relational calculus is a the definition of a relation in terms of one or more database relations. However be used to formulate nonprocedural language: lational algebra there is an equivalent expression in the calculus (and vice versa) and relational calculus are equivalent to one another for every expression in the calculus is used to measure the selective power of relational languages. A language that can be used elation that can be derived using the relational calculus is said to be relationally complete. . The relational Most e any to proiational query languages are relationally complete but have more expressive power than the relationali algebra on ar Gelational calculus because of additional operations such as calculated, summary, and ordering functions. indamental operations in relational algebra Selection, Projection, Cartesian product, Union, and Set derform most of the data retrieval operations that we are interested in. In addition, there are also the and Division operations, which can be expressed in terms of the five basic operations. The relational calculus is a formal nonprocedural language that uses predicates. There are two forms of the relational calculus: tuple relational calculus and domain relational calculus. tuple relational calculus, we are interested in finding tuples for which a predicate is true. A tuple variable i the a variable that "ranges over a named relation: that is, a variable whose only permitted values are tuples of the In the domain relational calculus, domain variables take their values from domains of attributes rather than relation. . I tuples of relations. .The relational algebra is logically equivalent to a safe subset of the relational calculus (and vice versa). data manipulation languages are sometimes classified as procedural or nonprocedural, transform- Relational oriented, graphical, fourth-generation, or fifth-generation. Review Questions 51 What is the difference between a procedural and a nonprocedural language? How would you classfy the relational algebra and relational calculus? 5.2 Explain the following terms: (a) relationally complete (b) closure of relational operations. 5.3 Define the five basic relational algebra operations. Define the join, Intersection, and Division operations in terms and Semi- and contrast the tuple relational calculus with domain relational calculus. In particular, discuss the dist 56 Define the structure of a (well-formed) formula in both the tuple relational calculus and domain relational calc these five basic operations. 54 Discuss the differences between the five Join operations: Theta join, Equijoin, Natural join, Outer join, join. Give examples to illustrate your answer tion between tuple and domain variables