When utilizing spreadsheets, cell references are vital. They allow you to explicitly indicate specific cells, making it more convenient to carry out calculations and modify data. There are two main types of cell references: absolute and relative. Fixed cell references remain the same, even when a formula is duplicated to another cell. They are in

SQL's GROUP BY clause|grouping function|aggregation statement} is a powerful tool for summarizing data. It allows you to aggregate rows with the same value in one or more columns into a single row, making it easier to analyze trends and patterns. Consider you have a table of sales transactions. Using GROUP BY, you could determine the total revenue