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SQL Basics

1/25 With SQL, how do you select all the columns from a table named "Products"?
- SELECT [all] FROM Products
- SELECT All Products
- SELECT *.Products
- SELECT * FROM Products
2/25 The OR operator shows a record if any conditions listed are true. The AND operator shows a record if all of the conditions listed are true.
- True
- False
3/25 Which SQL statement is applied for updating data in a database?
- UPDATE
- SAVE AS
- MODIFY
- SAVE
4/25 What SQL statement is used for inserting new data in a database?
- ADD RECORD
- ADD INTO
- INSERT INTO
- ADD NEW
5/25 Which SQL statement is used to delete data from a table?
- TRUNCATE
- DELETE
- REMOVE
6/25 The primary - foreign key relations are implemented to
- cross-reference database tables.
- clean-up the database.
- to index the database.
7/25 Which of the following is true about CASE SQL statement?
- A way to establish an IF-THEN-ELSE in SQL.
- A way to establish a loop in SQL.
- A way to establish a data definition in SQL.
- All of the above.
8/25 Which of the following statements is true about systems information in an RDBMS?
- RDBMS stores database definition information in system-created tables.
- Such information can be accessed with SQL.
- Often, such information cannot be updated by a user.
- All of the above.
9/25 Can the SELECT clause list have a computed value like in the example below? SELECT CustomerName, UnitPrice * NumberofUnits FROM Sale.
- No
- Yes
10/25 What is the purpose of constraints in SQL?
- To limit the type of data that can be stored in a column.
- To join tables together based on a condition.
- To sort the data in ascending or descending order.
- To group data based on column values.
11/25 What is the purpose of a view in SQL?
- To create a virtual table based on the result-set of an SQL statement.
- To insert new rows into a table.
- To define new data types.
- To permanently store data.
12/25 How do you update the 'Salary' column in the 'Employees' table for an employee with 'EmployeeID' 123 to 50000?
- UPDATE Employees SET Salary = 50000 WHERE EmployeeID = 123
- CHANGE Employees SET Salary = 50000 WHERE EmployeeID = 123
- MODIFY Employees SET Salary = 50000 WHERE EmployeeID = 123
- EDIT Employees SET Salary = 50000 FOR EmployeeID = 123
13/25 What is the purpose of the 'LIKE' operator in SQL?
- To compare a value to similar values using wildcard operators.
- To check for exact matches in a column.
- To perform mathematical operations.
- To limit the number of rows returned in a query.
14/25 Which of the following is a valid SQL aggregate function?
- COLLECT()
- COMBINE()
- SUM()
- CONNECT()
15/25 In SQL, what does the 'BETWEEN' operator do?
- Checks whether a value lies within a specified range.
- Compares two values for equality.
- Sorts the result set between two columns.
- Divides the result set into two parts.
16/25 Which of the following is NOT a valid aggregate function in SQL?
- SUM()
- AVERAGE()
- MAX()
- COUNT()
17/25 What is the primary purpose of the SQL 'INNER JOIN' clause?
- To combine rows from two or more tables based on a related column between them
- To retrieve rows that exist in one table but not in another
- To select all rows from both tables regardless of the match between columns
- To update records in one table based on values in another table
18/25 Which SQL clause is used to specify a condition while fetching data from a single table or joining multiple tables?
- HAVING
- WHERE
- ON
- AND
19/25 Which statement correctly shows the use of an alias in SQL?
- SELECT EmployeeID AS ID FROM Employees
- SELECT EmployeeID RENAME ID FROM Employees
- SELECT EmployeeID -> ID FROM Employees
- SELECT EmployeeID NAME ID FROM Employees
20/25 In SQL, which command is used to change the structure of a table such as adding a column or changing a column type?
- MODIFY TABLE
- CHANGE TABLE
- ALTER TABLE
- UPDATE TABLE
21/25 How can you retrieve unique values from the column 'EmployeeName' of the 'Employees' table?
- SELECT DISTINCT EmployeeName FROM Employees
- SELECT UNIQUE EmployeeName FROM Employees
- GET ALL UNIQUE EmployeeName FROM Employees
- SELECT EmployeeName FROM Employees DISTINCT
22/25 Which SQL clause is used to sort the result set in ascending or descending order?
- SORT BY
- ORDER BY
- ARRANGE BY
- SEQUENCE BY
23/25 In SQL, which command is used to add a new column to an existing table?
- ADD COLUMN column_name TO table_name
- INSERT COLUMN column_name INTO table_name
- ALTER TABLE table_name ADD column_name column_type
- UPDATE TABLE table_name SET ADD column_name column_type
24/25 How do you find the minimum value in a column named 'Price' from the 'Products' table?
- SELECT MIN(Price) FROM Products
- FIND MINIMUM(Price) IN Products
- SELECT LOWEST(Price) FROM Products
- GET MIN(Price) FROM Products
25/25 What does the SQL 'CROSS JOIN' clause do?
- Joins two tables in such a way that each row of the first table is combined with each row of the second table
- Joins only the matching rows between two tables
- Creates a join that can be filtered using a WHERE clause
- Combines rows from two tables based on a related column
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