The Optimizer can determine this based on UNIQUE and PRIMARY KEY constraints on the tables. When outer joins are used the row preserving table (table without the outer join operator) must come after the other table in the predicate (table with the outer join operator) to ensure all of...
What are primary keys in accounting databases, and what purpose do they serve? Explain the terms primary key, candidate key, and foreign key. Give an example for each. What are the main constraints when a relational database model is being logically designed? Explain yo...
For each table, you should list the primary key, foreign keys, other columns, and NOT NULL constraints for foreig What is a database object? What is database design? What is a database model? Data granularity refers to which of the following? ...
is not being accessed via a FTS operation but rather by a rowid lookup. In this case the rowid has been produced by looking up values in the index first. The index is being accessed by an 'INDEX UNIQUE SCAN' operation. This is explained below. The index name in this case is EMP_I1...
The Optimizer can determine this based on UNIQUE and PRIMARY KEY constraints on the tables. When outer joins are used the row preserving table (table without the outer join operator) must come after the other table in the predicate (table with the outer join operator) to ensure all of...
The Optimizer can determine this based on UNIQUE and PRIMARY KEY constraints on the tables. When outer joins are used the row preserving table (table without the outer join operator) must come after the other table in the predicate (table with the outer join operator) to ensure all ...
Formulate the logical constraints for the following statements (where A, B, C, and D are all binary variables): a. If A happens, then B or C happens. b. If A and B happen, then C and D must happen. c. Give an example in Python to better understand the loop while n...
What would be the objective function, decision variables, and constraints? What are the different types of operational definitions? Explain the independent and dependent variables. 1. Discuss several disadvantages of linear programming; clearly explain the reasons for your choices....