R count rows with multiple conditions
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Jan 31, 2003 · Each row in the result contains summary data related to the specific value in its grouping columns. If the statement includes a WHERE clause, the DBMS groups values after it applies search_condition to the rows in table. If the statement includes an ORDER BY clause, the columns in sort_columns must be drawn from those in columns.
ORDER BY – This is the specified order of the row number that you would like. If you wanted the order of the row number to increment by an employee name (alphabetically), you do that here. With this function I think examples will help paint the full picture. In the following query, the results will show a row number with each record.