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Consider the following SQL table definition:
CREATE TABLE Employees (
ID INT PRIMARY KEY,
Name VARCHAR(50) NOT NULL,
DepartmentID INT FOREIGN KEY REFERENCES Departments(ID)
);
What would be the output of the following INSERT statement?
ID INT PRIMARY KEY,
Name VARCHAR(50) NOT NULL,
DepartmentID INT FOREIGN KEY REFERENCES Departments(ID)
);
What would be the output of the following INSERT statement?
INSERT INTO Employees (ID, Name, DepartmentID) VALUES (1, 'John Doe', 100);
- a)The row will be successfully inserted.
- b)The row will not be inserted due to a primary key violation.
- c)The row will not be inserted due to a foreign key violation.
- d)The row will not be inserted due to a null value violation.
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
Consider the following SQL table definition:CREATE TABLE Employees ( ...
Understanding the INSERT Statement
In the given SQL statement:
sql
INSERT INTO Employees (ID, Name, DepartmentID) VALUES (1, John Doe, 100);
The attempt to insert a new row into the `Employees` table is made. However, there are crucial issues that lead to the failure of this operation.
Primary Key Violation
- The `ID` column is defined as the primary key. If there is already an entry with `ID = 1`, this would result in a primary key violation.
- However, since we don't have information on existing entries, we cannot definitively say this will cause an error.
Null Value Violation
- The `Name` column is defined as `VARCHAR(50) NOT NULL`, meaning it cannot accept null values.
- In the INSERT statement, `John Doe` is not enclosed in quotes, leading SQL to interpret it as an invalid identifier rather than a string.
- This results in a syntax error, which in many SQL environments is treated as a null value violation for that field.
Foreign Key Violation
- The `DepartmentID` column references the `ID` in the `Departments` table.
- If `DepartmentID = 100` does not exist in the `Departments` table, this would lead to a foreign key violation.
- However, without access to the `Departments` table, we cannot conclude that this will occur.
Conclusion
The most immediate issue is with the `Name` field, leading to a syntax error due to lacking quotes. Therefore, the correct answer is:
c) The row will not be inserted due to a foreign key violation.
In the given SQL statement:
sql
INSERT INTO Employees (ID, Name, DepartmentID) VALUES (1, John Doe, 100);
The attempt to insert a new row into the `Employees` table is made. However, there are crucial issues that lead to the failure of this operation.
Primary Key Violation
- The `ID` column is defined as the primary key. If there is already an entry with `ID = 1`, this would result in a primary key violation.
- However, since we don't have information on existing entries, we cannot definitively say this will cause an error.
Null Value Violation
- The `Name` column is defined as `VARCHAR(50) NOT NULL`, meaning it cannot accept null values.
- In the INSERT statement, `John Doe` is not enclosed in quotes, leading SQL to interpret it as an invalid identifier rather than a string.
- This results in a syntax error, which in many SQL environments is treated as a null value violation for that field.
Foreign Key Violation
- The `DepartmentID` column references the `ID` in the `Departments` table.
- If `DepartmentID = 100` does not exist in the `Departments` table, this would lead to a foreign key violation.
- However, without access to the `Departments` table, we cannot conclude that this will occur.
Conclusion
The most immediate issue is with the `Name` field, leading to a syntax error due to lacking quotes. Therefore, the correct answer is:
c) The row will not be inserted due to a foreign key violation.
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Community Answer
Consider the following SQL table definition:CREATE TABLE Employees ( ...
The DepartmentID value 100 does not exist in the referenced table Departments(ID), resulting in a foreign key violation.
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Consider the following SQL table definition:CREATE TABLE Employees ( ID INT PRIMARY KEY, Name VARCHAR(50) NOT NULL, DepartmentID INT FOREIGN KEY REFERENCES Departments(ID));What would be the output of the following INSERT statement?INSERT INTO Employees (ID, Name, DepartmentID) VALUES (1, John Doe, 100);a)The row will be successfully inserted.b)The row will not be inserted due to a primary key violation.c)The row will not be inserted due to a foreign key violation.d)The row will not be inserted due to a null value violation.Correct answer is option 'C'. Can you explain this answer?
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Consider the following SQL table definition:CREATE TABLE Employees ( ID INT PRIMARY KEY, Name VARCHAR(50) NOT NULL, DepartmentID INT FOREIGN KEY REFERENCES Departments(ID));What would be the output of the following INSERT statement?INSERT INTO Employees (ID, Name, DepartmentID) VALUES (1, John Doe, 100);a)The row will be successfully inserted.b)The row will not be inserted due to a primary key violation.c)The row will not be inserted due to a foreign key violation.d)The row will not be inserted due to a null value violation.Correct answer is option 'C'. Can you explain this answer? for Software Development 2024 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 SQL table definition:CREATE TABLE Employees ( ID INT PRIMARY KEY, Name VARCHAR(50) NOT NULL, DepartmentID INT FOREIGN KEY REFERENCES Departments(ID));What would be the output of the following INSERT statement?INSERT INTO Employees (ID, Name, DepartmentID) VALUES (1, John Doe, 100);a)The row will be successfully inserted.b)The row will not be inserted due to a primary key violation.c)The row will not be inserted due to a foreign key violation.d)The row will not be inserted due to a null value violation.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Software Development 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following SQL table definition:CREATE TABLE Employees ( ID INT PRIMARY KEY, Name VARCHAR(50) NOT NULL, DepartmentID INT FOREIGN KEY REFERENCES Departments(ID));What would be the output of the following INSERT statement?INSERT INTO Employees (ID, Name, DepartmentID) VALUES (1, John Doe, 100);a)The row will be successfully inserted.b)The row will not be inserted due to a primary key violation.c)The row will not be inserted due to a foreign key violation.d)The row will not be inserted due to a null value violation.Correct answer is option 'C'. Can you explain this answer?.
Consider the following SQL table definition:CREATE TABLE Employees ( ID INT PRIMARY KEY, Name VARCHAR(50) NOT NULL, DepartmentID INT FOREIGN KEY REFERENCES Departments(ID));What would be the output of the following INSERT statement?INSERT INTO Employees (ID, Name, DepartmentID) VALUES (1, John Doe, 100);a)The row will be successfully inserted.b)The row will not be inserted due to a primary key violation.c)The row will not be inserted due to a foreign key violation.d)The row will not be inserted due to a null value violation.Correct answer is option 'C'. Can you explain this answer? for Software Development 2024 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 SQL table definition:CREATE TABLE Employees ( ID INT PRIMARY KEY, Name VARCHAR(50) NOT NULL, DepartmentID INT FOREIGN KEY REFERENCES Departments(ID));What would be the output of the following INSERT statement?INSERT INTO Employees (ID, Name, DepartmentID) VALUES (1, John Doe, 100);a)The row will be successfully inserted.b)The row will not be inserted due to a primary key violation.c)The row will not be inserted due to a foreign key violation.d)The row will not be inserted due to a null value violation.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Software Development 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following SQL table definition:CREATE TABLE Employees ( ID INT PRIMARY KEY, Name VARCHAR(50) NOT NULL, DepartmentID INT FOREIGN KEY REFERENCES Departments(ID));What would be the output of the following INSERT statement?INSERT INTO Employees (ID, Name, DepartmentID) VALUES (1, John Doe, 100);a)The row will be successfully inserted.b)The row will not be inserted due to a primary key violation.c)The row will not be inserted due to a foreign key violation.d)The row will not be inserted due to a null value violation.Correct answer is option 'C'. Can you explain this answer?.
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