When you have kidney disease, your kidneys are no longer able to remove waste effectively from your body or to balance your fluids. The build up of wastes can change the chemistry of your body causing some symptoms that you can feel, and others that you don't.
Reference to a range of cells is typically of the form (A1:A6), which specifies all the cells in the range A1 through to A6. A formula such as =SUM(A1:A6) would add all the cells specified and put the result in the cell containing the formula itself.
The leap from formulas to queries. The most common way to manipulate data in Excel is by using formulas. A formula consists of one or more functions that tell Excel what to do with the data in a cell. For instance, you can add numerical values together using SUM(A1:A5) or average them using AVERAGE(A1:A5). The SQL equivalent of a formula is a query.