1. What is the purpose of the SQL AVG() function?
Explanation: The AVG() function is used to calculate the average value of a numeric column.
Report for correction2. What is the purpose of the SQL MIN() function?
Explanation: The MIN() function is used to find the minimum value of a numeric column in a database table.
Report for correction3. Which SQL statement is used to remove a table from a database?
Explanation: The DROP TABLE statement is used to remove a table from a database.
Report for correction4. What is the purpose of the SQL COUNT() function?
Explanation: The COUNT() function is used to count the number of records in a result set.
Report for correction5. Which SQL statement is used to add a primary key to an existing table?
Explanation: The ADD PRIMARY KEY statement is used to add a primary key to an existing table.
Report for correction6. What is the purpose of the SQL MAX() function?
Explanation: The MAX() function is used to calculate the maximum value of a numeric column.
Report for correction7. Which SQL statement is used to create a new table?
Explanation: The CREATE TABLE statement is used to create a new table in a database.
Report for correction8. What is the purpose of the SQL WHERE clause?
Explanation: The WHERE clause is used to filter rows in the result set based on a specified condition.
Report for correction9. What does the SQL DISTINCT keyword do?
Explanation: The DISTINCT keyword is used to retrieve unique values from a column in a SELECT query.
Report for correction10. Which SQL statement is used to add a new column to an existing table?
Explanation: The ALTER TABLE statement is used to add a new column to an existing table.
Report for correction11. What is the purpose of the SQL HAVING clause?
Explanation: The HAVING clause is used to filter grouped rows based on specified conditions.
Report for correction12. Which SQL statement is used to delete all records from a table without deleting the table structure?
Explanation: The TRUNCATE TABLE statement is used to delete all records from a table without deleting the table structure.
Report for correction13. What does DML stand for in SQL?
Explanation: DML stands for Data Manipulation Language, which is used to manipulate data stored in a database.
Report for correction14. Which SQL statement is used to change data in an existing table?
Explanation: The UPDATE statement is used to change data in an existing table.
Report for correction15. What is the purpose of the SQL SUM() function?
Explanation: The SUM() function is used to calculate the total sum of a numeric column.
Report for correction16. What is the result of the following SQL query SELECT COUNT(*) FROM Customers;?
Explanation: The COUNT(*) function counts the total number of records in the Customers table.
Report for correction17. Which SQL statement is used to join two or more tables based on a related column?
Explanation: The JOIN statement is used to combine data from two or more tables based on a related column.
Report for correction18. What is the purpose of the SQL GROUP BY clause?
Explanation: The GROUP BY clause is used to group rows into sets based on specified columns.
Report for correction19. What does the SQL ORDER BY clause do?
Explanation: The ORDER BY clause is used to sort the query results based on one or more columns.
Report for correction20. Which SQL statement is used to retrieve unique values from a column?
Explanation: The DISTINCT keyword is used to retrieve unique values from a column in a SELECT query.
Report for correction21. Which SQL statement is used to insert new records into a table?
Explanation: The INSERT statement is used to insert new records into a table in a database.
Report for correction22. What is the purpose of the SQL DELETE statement?
Explanation: The DELETE statement is used to remove records from a table in a database.
Report for correction23. Which SQL statement is used to update existing records in a database?
Explanation: The UPDATE statement is used to update existing records in a database.
Report for correction24. Which SQL statement is used to retrieve data from a database?
Explanation: The SELECT statement is used to retrieve data from a database.
Report for correction