Software Development Exam > Software Development Questions > Consider the following table structure:CREATE...
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Consider the following table structure:
CREATE TABLE employees (
emp_id NUMBER,
emp_name VARCHAR2(50),
emp_salary NUMBER
);
Which of the following SQL statements will retrieve the names of all employees?
emp_id NUMBER,
emp_name VARCHAR2(50),
emp_salary NUMBER
);
Which of the following SQL statements will retrieve the names of all employees?
- a)SELECT * FROM employees;
- b)SELECT emp_name FROM employees;
- c)SELECT emp_id, emp_name FROM employees;
- d)SELECT emp_salary FROM employees;
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Consider the following table structure:CREATE TABLE employees ( emp_id...
The SQL statement SELECT emp_name FROM employees; will retrieve only the names of all employees from the "employees" table.
Most Upvoted Answer
Consider the following table structure:CREATE TABLE employees ( emp_id...
Explanation:
The correct SQL statement to retrieve the names of all employees from the given table structure is option 'B' - SELECT emp_name FROM employees.
Reasoning:
Let's go through each option and understand their purpose:
a) SELECT * FROM employees:
- The asterisk (*) is a wildcard character that represents all columns in a table.
- This statement will retrieve all columns (emp_id, emp_name, emp_salary) for all employees from the employees table.
- However, the question specifically asks for the names of all employees, so this option is not the correct answer.
b) SELECT emp_name FROM employees:
- This statement retrieves only the emp_name column from the employees table.
- Since the question asks for the names of all employees, this option accurately provides the desired result.
- This is the correct answer.
c) SELECT emp_id, emp_name FROM employees:
- This statement retrieves both the emp_id and emp_name columns from the employees table.
- While it includes the emp_name column, it also includes the emp_id column which is not needed for this specific requirement.
- Therefore, this option is not the correct answer.
d) SELECT emp_salary FROM employees:
- This statement retrieves only the emp_salary column from the employees table.
- It does not include the emp_name column which is required to retrieve the names of all employees.
- Therefore, this option is not the correct answer.
Conclusion:
The SQL statement that will retrieve the names of all employees from the given table structure is option 'B' - SELECT emp_name FROM employees. This statement specifically selects only the emp_name column, which fulfills the requirement mentioned in the question.
The correct SQL statement to retrieve the names of all employees from the given table structure is option 'B' - SELECT emp_name FROM employees.
Reasoning:
Let's go through each option and understand their purpose:
a) SELECT * FROM employees:
- The asterisk (*) is a wildcard character that represents all columns in a table.
- This statement will retrieve all columns (emp_id, emp_name, emp_salary) for all employees from the employees table.
- However, the question specifically asks for the names of all employees, so this option is not the correct answer.
b) SELECT emp_name FROM employees:
- This statement retrieves only the emp_name column from the employees table.
- Since the question asks for the names of all employees, this option accurately provides the desired result.
- This is the correct answer.
c) SELECT emp_id, emp_name FROM employees:
- This statement retrieves both the emp_id and emp_name columns from the employees table.
- While it includes the emp_name column, it also includes the emp_id column which is not needed for this specific requirement.
- Therefore, this option is not the correct answer.
d) SELECT emp_salary FROM employees:
- This statement retrieves only the emp_salary column from the employees table.
- It does not include the emp_name column which is required to retrieve the names of all employees.
- Therefore, this option is not the correct answer.
Conclusion:
The SQL statement that will retrieve the names of all employees from the given table structure is option 'B' - SELECT emp_name FROM employees. This statement specifically selects only the emp_name column, which fulfills the requirement mentioned in the question.
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Consider the following table structure:CREATE TABLE employees ( emp_id NUMBER, emp_name VARCHAR2(50), emp_salary NUMBER);Which of the following SQL statements will retrieve the names of all employees?a)SELECT * FROM employees;b)SELECT emp_name FROM employees;c)SELECT emp_id, emp_name FROM employees;d)SELECT emp_salary FROM employees;Correct answer is option 'B'. Can you explain this answer?
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Consider the following table structure:CREATE TABLE employees ( emp_id NUMBER, emp_name VARCHAR2(50), emp_salary NUMBER);Which of the following SQL statements will retrieve the names of all employees?a)SELECT * FROM employees;b)SELECT emp_name FROM employees;c)SELECT emp_id, emp_name FROM employees;d)SELECT emp_salary FROM employees;Correct answer is option 'B'. Can you explain this answer? for Software Development 2025 is part of Software Development preparation. The Question and answers have been prepared according to the Software Development exam syllabus. Information about Consider the following table structure:CREATE TABLE employees ( emp_id NUMBER, emp_name VARCHAR2(50), emp_salary NUMBER);Which of the following SQL statements will retrieve the names of all employees?a)SELECT * FROM employees;b)SELECT emp_name FROM employees;c)SELECT emp_id, emp_name FROM employees;d)SELECT emp_salary FROM employees;Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Software Development 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following table structure:CREATE TABLE employees ( emp_id NUMBER, emp_name VARCHAR2(50), emp_salary NUMBER);Which of the following SQL statements will retrieve the names of all employees?a)SELECT * FROM employees;b)SELECT emp_name FROM employees;c)SELECT emp_id, emp_name FROM employees;d)SELECT emp_salary FROM employees;Correct answer is option 'B'. Can you explain this answer?.
Consider the following table structure:CREATE TABLE employees ( emp_id NUMBER, emp_name VARCHAR2(50), emp_salary NUMBER);Which of the following SQL statements will retrieve the names of all employees?a)SELECT * FROM employees;b)SELECT emp_name FROM employees;c)SELECT emp_id, emp_name FROM employees;d)SELECT emp_salary FROM employees;Correct answer is option 'B'. Can you explain this answer? for Software Development 2025 is part of Software Development preparation. The Question and answers have been prepared according to the Software Development exam syllabus. Information about Consider the following table structure:CREATE TABLE employees ( emp_id NUMBER, emp_name VARCHAR2(50), emp_salary NUMBER);Which of the following SQL statements will retrieve the names of all employees?a)SELECT * FROM employees;b)SELECT emp_name FROM employees;c)SELECT emp_id, emp_name FROM employees;d)SELECT emp_salary FROM employees;Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Software Development 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following table structure:CREATE TABLE employees ( emp_id NUMBER, emp_name VARCHAR2(50), emp_salary NUMBER);Which of the following SQL statements will retrieve the names of all employees?a)SELECT * FROM employees;b)SELECT emp_name FROM employees;c)SELECT emp_id, emp_name FROM employees;d)SELECT emp_salary FROM employees;Correct answer is option 'B'. Can you explain this answer?.
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