Staten Solar Interview Questions and Answers

Joins are used to combine data from two or more tables based on a related column.

• Use JOIN keyword followed by the name of the table to join

• Specify the columns to join on using ON keyword

• Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL OUTER JOIN

• Example: SELECT * FROM table1 JOIN table2 ON table1.column = table2.column

• Use aliases to simplify the query

Managing multiple stakeholders requires clear communication, prioritization, and active listening.

• Identify key stakeholders and their interests

• Establish clear communication channels and expectations

• Prioritize stakeholder needs and manage expectations

• Actively listen to feedback and adjust accordingly

• Maintain transparency and keep stakeholders informed

• Address conflicts and concerns proactively

American Express earns money primarily through fees charged to merchants and cardholders, interest on outstanding balances, and investment income.

• Merchant fees: Amex charges merchants a fee for accepting their cards as payment, typically higher than other credit card companies.

• Cardholder fees: Amex charges annual fees, late fees, and foreign transaction fees to cardholders.

• Interest income: Amex earns interest on outstanding balances from cardholders who carry a balance from m...read more

Concatenate in SQL is done using the CONCAT function or the + operator.

• Use the CONCAT function to concatenate strings in SQL, for example: SELECT CONCAT(first_name, ' ', last_name) AS full_name FROM employees;

• Alternatively, you can use the + operator to concatenate strings, for example: SELECT first_name + ' ' + last_name AS full_name FROM employees;

American Express generates revenue from various sources including card fees, interest income, and merchant fees.

• Card fees from annual fees, late fees, and foreign transaction fees

• Interest income from carrying balances on credit cards

• Merchant fees from transactions made with American Express cards