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SQL Basics in MySQL

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Questions and Answers

What does SQL stand for?

Structured Query List

Simple Query Line

Structured Query Language (correct)

Standard Question Language

What is the primary purpose of the Update statement in SQL?

To insert records into a table

To modify existing records in a table (correct)

To display all records in a table

To remove records from a table

Which of the following correctly describes the Insert statement?

It can only insert multiple records at once.

It allows the insertion of rows into a newly created table only.

It deletes records from the table.

It is used to insert one row into an existing table. (correct)

In the Delete statement, what will be the result of using 'Delete From TableName Where criteria'?

It deletes records that meet specific criteria. Signup and view all the answers

When updating the value of a column in an SQL table, what keyword is used to specify which records to update?

WHERE Signup and view all the answers

What type of database management system is MySQL based on?

Relational Database Management System Signup and view all the answers

Which SQL statement performs the function of modifying the 'FirstName' in an existing User record?

UPDATE Users SET FirstName='NewValue' WHERE Id='X1' Signup and view all the answers

What must be included in an Insert statement to properly add a new record into a table?

Column names and corresponding values Signup and view all the answers

What is the effect of executing the command 'DELETE FROM TableName'?

It deletes all records in the table, leaving it empty. Signup and view all the answers

Which SQL statement correctly deletes all users whose city is 'Stavanger'?

DELETE FROM Users WHERE City = 'Stavanger'; Signup and view all the answers

What is the result of the query 'SELECT * FROM Group.Users WHERE Id = 3 OR Id = 5'?

It returns the records where Id is 3 and 5. Signup and view all the answers

Which of the following SQL statements correctly retrieves only the first and last names from the Users table?

SELECT FName, LName FROM Group.Users; Signup and view all the answers

What is the outcome of the query 'SELECT Id, FName, Address FROM Group.Users WHERE City = 'Q';'?

It returns only the user(s) residing in City 'Q' with their Id, FName, and Address. Signup and view all the answers

Study Notes

MySQL

SQL: Stands for Structured Query Language, a standard sublanguage for database systems.
MySQL: Is a relational database management system (RDBMS) developed by Oracle, built on SQL.

Insert Statement

Used to insert one row (one record) into an existing table.
General form: Insert Into TableName (col1, col2, col3,...) Values (value1, value2, value3, ...);

Update Statement

Used to update existing record(s) in a table.
General form: UPDATE Table_Name SET column1=value1, column2=value2,... WHERE criteria;

Delete Statement

Used to delete record(s) from an existing table.
Two forms:
- Delete From TableName Where criteria: Deletes all records that satisfy the given criteria.
- Delete From TableName: Deletes all records in the table (leaving it empty).

Select Statement

Used to select data from a table, storing the result in a result table called a result-set.
General forms:
- Select * From TableName: Selects all columns from the specified table.
- Select * From TableName Where Criteria: Selects all columns, but only records that meet the specified criteria.
- Select col1, col2, ... From TableName: Selects only the specified columns from the table.
- Select col1, col2, ... From TableName Where Criteria: Selects only the specified columns, but only records that meet the specified criteria.

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Description

This quiz covers the fundamental concepts of SQL as applied within MySQL, including Insert, Update, Delete, and Select statements. Test your knowledge on how to manipulate data in relational databases with these essential commands.