Databases-referential integrity

Hi, I need assistance to the enclosed problem. Regards, 1) Do the tables exhibit entity integrity? Answer Yes or No, and then explain your answer. TABLE ENTITY INTEGRITY EXPLANATION TRUCK BASE TYPE TABLE PRIMARY KEY FOREIGN KEY(S) TRUCK BASE TYPE

Databases - Identification of candidate key

Hi, I need assistance to the enclosed problem. Regards, Do the tables exhibit referential integrity? Answer Yes or No, and then explain your answer. Write NA (Not Applicable) if the table does not have a foreign key. TABLE REFERENTIAL INTEGRITY EXPLANATION TRUCK BASE TYPE Reference Figures: TABLE PRIMARY ...continues

Databases - Identification candidate keys

Hi, I need assistance to the enclosed problem. Regards, Problem: Identify the TRUCK table’s candidate key(s). Reference Figures: TABLE PRIMARY KEY FOREIGN KEY(S) TRUCK BASE TYPE

Databases - Identification of super key and secondary key

Hi, I need assistance to the enclosed problem. Regards, 1) For each table, identify a superkey and a secondary key. TABLE SUPERKEY SECONDARY KEY TRUCK BASE TYPE Reference Figures: TABLE PRIMARY KEY FOREIGN KEY(S) TRUCK BASE TYPE

Databases-ERD diagram requirement

Hi, I need assistance to the enclosed problem. Regards, Problem: Draw the entity relationship diagram for this database. Reference Figures: TABLE PRIMARY KEY FOREIGN KEY(S) TRUCK BASE TYPE

SQL Coding

Hi, I required assistance to the enclosed problems. Regards, Vishnu Vandana As you examine Figure Q7.1, note that the ASSIGNMENT table stores the JOB charge per hour the employee job code values as a “native” attribute to maintain historical accuracy of the data. The JOB_CHG_HOUR values are likely to change over time. ...continues

Difference between a composite key and a composite attribute

Hi, I need assistance in the following problem with words along with references. Discuss the difference between a composite key and a composite attribute. How would each be indicated in an ERD? Regards,

Multivalued attributes

Hi, What two courses of action are available to designer encountering a multivalued attribute? Regards,

Databases-derived attribute

Hi, What is derived attribute? Give an example. I require a detailed example and definition of this problem with referencing please. Regards,

Writing correlated subqueries

1. Write a correlated subquery to determine whether the data support the supposition to the following. Suppose that a table contains two nonkey columns; AdviserName and AdviserPhone. Further suppose that you suspect that AdviserPhone  AdviserName. 2. Answer question 1 but use EXISTS.