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| Section | Objectives |
|---|
| Topic 1: SQL Functions | - Single-row functions
- 1. Character, numeric, date functions
- Conversion and conditional functions
- 1. TO_CHAR, TO_NUMBER, CASE expressions
|
| Topic 2: SQL Retrieval | - SELECT statements and filtering data
- 1. ORDER BY and row limiting
- 2. WHERE clause and conditions
- Joins and set operations
- 1. INNER, OUTER, CROSS joins
- 2. UNION, INTERSECT, MINUS
|
| Topic 3: Subqueries and Advanced SQL | - Single-row and multi-row subqueries - Correlated subqueries and nested queries
|
| Topic 4: Relational Database Concepts | - Data types and database objects overview - Tables, rows, columns, and relational model basics
|
| Topic 5: Data Manipulation and Schema Objects | - DDL operations
- 1. CREATE, ALTER, DROP tables and constraints
- DML operations
- 1. INSERT, UPDATE, DELETE, MERGE
|
>> Exam 1z1-071 Labs <<
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Oracle Database SQL Sample Questions (Q23-Q28):
NEW QUESTION # 23
View the Exhibit and examine the structure of the PRODUCTtable.

Which two tasks would require subqueries? (Choose two.)
- A. display the minimum list price for each product status
- B. display the number of products whose list prices are more than the average list price
- C. display all products whose minimum list price is more than the average list price of products having the status 'orderable'
- D. display the total number of products supplied by supplier 102 and have product status as 'OBSOLETE'
- E. display all suppliers whose list price is more than 1000
Answer: B,C
NEW QUESTION # 24
Which two statements are true regarding single row functions? (Choose two.)
- A. TRIM : can be used to remove all the occurrences of a character from a string.
- B. TRUNC : can be used with NUMBER and DATE values.
- C. CONCAT : can be used to combine any number of values.
- D. MOD : returns the quotient of a division.
- E. INSTR : can be used to find only the first occurrence of a character in a string.
- F. SYSDATE : returns the database server current date and time.
Answer: B,F
NEW QUESTION # 25
Examine this business rule:
Each student can work on multiple projects and each project can have multiple students.
You must design an Entity Relationship(ER) model for optimal data storage and allow for generating reports in this format:

Which two statements are true?
- A. STUDENT ID must be the primary key in the STUDENTS entity and foreign key in the PROJECTS entity.
- B. The ER must have a many to-many relationship between the STUDENTS and PROJECTS entities that must be resolved into 1-to-many relationships.
- C. The ER must have a 1-to-many relationship between the STUDENTS and PROJECTS entities.
- D. PROJECT_ID must be the primary key in the PROJECTS entity and foreign key in the STUDENTS entity.
- E. An associative table must be created with a composite key of STUDENT_ID and PROJRCT_ID, which is the foreign key linked to the STUDENTS and PROJECTS entities.
Answer: B,E
Explanation:
Based on the business rule, the true statements regarding the Entity Relationship (ER) model are:
A . An associative table must be created with a composite key of STUDENT_ID and PROJECT_ID, which is the foreign key linked to the STUDENTS and PROJECTS entities. This is true because, in a many-to-many relationship, an associative (junction) table is used to maintain the associations between two entities.
D . The ER must have a many-to-many relationship between the STUDENTS and PROJECTS entities that must be resolved into 1-to-many relationships. This is correct because many-to-many relationships are resolved by introducing an associative table that breaks it down into two 1-to-many relationships.
Options B, C, and E are incorrect:
B is incorrect because PROJECT_ID should not be a foreign key in the STUDENTS entity in a many-to-many relationship.
C is incorrect as the rule indicates a many-to-many relationship, not 1-to-many.
E is incorrect because STUDENT_ID should not be a foreign key in the PROJECTS entity in a many-to-many relationship.
NEW QUESTION # 26
Examine the structure of the DEPARTMENTS table.

You execute the following command:

Which two statements are true?
- A. Unique key constraints defined on the COUNTRY column are removed.
- B. A new column, COUNTRY, can be added to the DEPARTMENTS table after executing the command.
- C. Indexes created on the COUNTRY column exist until the DROP UNUSED COLUMNS command is executed.
- D. Views created in the DEPARTMENTS table that include the COUNTRY column are automatically modified and remain valid.
- E. Synonyms existing of the DEPARTMENTS table would have to be re-created.
Answer: A,B
NEW QUESTION # 27
Examine this partial command:

Which two clauses are required for this command to execute successfully?
- A. the LOCATIONclause
- B. the ACCESS PARAMETERSclause
- C. the REJECT LIMITclause
- D. the DEFAULT DIRECTORYclause
- E. the access driver TYPEclause
Answer: A,E
NEW QUESTION # 28
......
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