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Questions and Answers
What does SQL stand for?
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?
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?
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'?
In the Delete statement, what will be the result of using 'Delete From TableName Where criteria'?
When updating the value of a column in an SQL table, what keyword is used to specify which records to update?
When updating the value of a column in an SQL table, what keyword is used to specify which records to update?
What type of database management system is MySQL based on?
What type of database management system is MySQL based on?
Which SQL statement performs the function of modifying the 'FirstName' in an existing User record?
Which SQL statement performs the function of modifying the 'FirstName' in an existing User record?
What must be included in an Insert statement to properly add a new record into a table?
What must be included in an Insert statement to properly add a new record into a table?
What is the effect of executing the command 'DELETE FROM TableName'?
What is the effect of executing the command 'DELETE FROM TableName'?
Which SQL statement correctly deletes all users whose city is 'Stavanger'?
Which SQL statement correctly deletes all users whose city is 'Stavanger'?
What is the result of the query 'SELECT * FROM Group.Users WHERE Id = 3 OR Id = 5'?
What is the result of the query 'SELECT * FROM Group.Users WHERE Id = 3 OR Id = 5'?
Which of the following SQL statements correctly retrieves only the first and last names from the Users table?
Which of the following SQL statements correctly retrieves only the first and last names from the Users table?
What is the outcome of the query 'SELECT Id, FName, Address FROM Group.Users WHERE City = 'Q';'?
What is the outcome of the query 'SELECT Id, FName, Address FROM Group.Users WHERE City = 'Q';'?
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.