When dealing with spreadsheets, cell references are crucial. They permit you to directly point to specific cells, making it simpler to perform calculations and modify data. There are two main types of cell references: absolute and relative. Fixed cell references persist the same, even when a formula is transferred to another cell. They are shown

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