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Questions and Answers
Which statement is true about using SELECT * in SQL queries?
Which statement is true about using SELECT * in SQL queries?
- It is a shorthand for querying specific fields
- It is more efficient than using the SELECT statement
- It queries only the necessary data from a table
- It queries all available data from a table (correct)
Why is it recommended to use the SELECT statement instead of SELECT * in SQL queries?
Why is it recommended to use the SELECT statement instead of SELECT * in SQL queries?
- It is easier to write and understand
- It is a best practice in SQL development
- It allows for faster query execution
- It saves database resources by querying only the necessary data (correct)
Which of the following is an example of an inefficient SQL query?
Which of the following is an example of an inefficient SQL query?
- SELECT ProductName, Price FROM Products
- SELECT * FROM Orders
- SELECT * FROM Customers (correct)
- SELECT FirstName, LastName, Address, City, State, Zip FROM Customers
What kind of information does the efficient SQL query SELECT FirstName, LastName, Address, City, State, Zip FROM Customers retrieve?
What kind of information does the efficient SQL query SELECT FirstName, LastName, Address, City, State, Zip FROM Customers retrieve?
To keep an index of all tables and field names, which system table can be queried?
To keep an index of all tables and field names, which system table can be queried?
Which statement is true about using SELECT * in SQL queries?
Which statement is true about using SELECT * in SQL queries?
What is the purpose of using the SELECT statement in SQL queries?
What is the purpose of using the SELECT statement in SQL queries?
Which of the following is an example of an inefficient SQL query?
Which of the following is an example of an inefficient SQL query?
What additional information may be retrieved by the inefficient SQL query SELECT * FROM Customers?
What additional information may be retrieved by the inefficient SQL query SELECT * FROM Customers?
To keep an index of all tables and field names, which system table can be queried?
To keep an index of all tables and field names, which system table can be queried?
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