1. In Oracle, when is it better to use materialized views? A. It is always better to use materialized views because views are obsolete and materialized views replace them B. When a query is slow and its results need to be cached C. When the involved query is called many times from different places D. When there are many materials involved in the view E. Every time a view is slow 2. We have two tables, each with one column X of type number which is the primary key. Table A has 100 rows, Table B has 50 rows. When doing an Inner Join between A and B on X, which option would be correct? A. The maximum number of rows is 100, the minimum number of rows 50 B. The maximum number of rows is 5000, the minimum …show more content…
All of the above 10. What is the difference between UNION and UNION ALL commands? A. No difference, they are the same. UNION ALL is obsolete. B. UNION creates a union set of rows of two tables. UNION ALL does the same, but keeps only distinct rows. C. UNION ALL creates a union set of rows of two tables. UNION does the same, but keeps only distinct rows. D. UNION is faster than UNION ALL. E. UNION ALL is faster than
Which of the following defines a relationship in which each occurrence of data in one entity
foreign policy during the period of 1945-1963 in combating Communist aggression in Europe and Asia? Use the Documents and your knowledge of the period to construct your response.
Q 1: Perform Verify and Count Commands for all three tables and identify any exceptions.
- Tables are useful in showing relationships and making comparisons. They should have title, row, column headings, population, source and explanations.
# 6: Given a physical database containing tables and relationships and business requirements, create the necessary queries.
A relational database is a database that consists of a collection of tables with columns showing entities, and rows showing data. This type of database uses a primary key and foreign key. The foreign key in another table will point to the primary key of a table, and this is how tables can relate to each other. This permits for one-to-one, one-to-many, and many-to-many relationship between the data. An advantage of relational databases includes the ease of adding or modifying new tables and entities without needing to change the structure of the database already in place. Relational database have many features, including indexing, setting data type, and setting validation tests, all these help to ensure data integrity.
Tuple is Unique: The tuples or rows in tables are unique within the table. This is enforce by primary key and other unique keys on columns which makes row unique.
Why would you fight the war for texas? The Kansas-Nebraska act replaced the Missouri compromise in 1854 after congress repealed the Missouri Compromise. The Repeal led to a mini war because the north Was not okay with the repeal. Why did Texans fight the civil war? Texans fought for the civil war, because they wanted to protect slavery, their love for Texas, and protect states rights.
This quote expresses some fear in France, and England. Which then trns to re-opening all of the colonial questions. It was not intended, obvisoulsy, implies colonial claims that came ot be because of war. Which means the German and many other colonies may possibly be under international condiserattion due to the war. The stipulatiom of the case for the german colonies is the title has to be determined once the war has reached its conclusion by impartial adjustments based on principles. There are two different kinds, the Equitable claims and the intrest of population concerns. Equitable claims made by Japan and Great Britian because they are going to use them as submarine bases.
Set associative mapping is made up of direct and full associated mapping. The branch address is mapped to multiple entries of the table while inside those set of entries, search is made fully associative.
Unions have been around for a long time. The first recorded union was in 1792, when shoemakers in Philadelphia met to consider matters of common interest. This earliest form of
Example 1 – Consider the following relational database for the Super Baseball League. It keeps track of teams in the league, coaches and players on the teams, work experience of the coaches, bats belonging to each team, and which players have played on which teams. Note the following facts about this environment:
B. Matching type. Match concepts in column left with the best answers in column right. Write letters only.