Oracle RANK() Function: A Comprehensive Guide - Assign Ranks to Rows

In Oracle, the RANK() function is used to assign a rank to each row within the result set based on the values in one or more columns. The rank is determined by the ORDER BY clause specified in the query.\n\nHere is the syntax for using the RANK() function in Oracle:\n\nRANK() OVER (PARTITION BY column1, column2, ... ORDER BY column3, column4, ...)\n\nThe PARTITION BY clause is optional and is used to divide the result set into partitions based on the specified columns. The ORDER BY clause is used to determine the order in which the rows are ranked within each partition.\n\nThe RANK() function returns a unique rank for each distinct value in the ORDER BY clause. If two or more rows have the same values in the ORDER BY columns, they will receive the same rank, and the next rank value will be skipped. For example, if two rows have the same values and rank 1, the next row will receive rank 3.\n\nHere is an example of how to use the RANK() function in Oracle:\n\nSELECT column1, column2, column3, RANK() OVER (ORDER BY column4 DESC) AS rank\nFROM table_name;\n\nThis query will return the columns column1, column2, column3, and the rank assigned to each row based on the descending order of column4. The rank will be a sequential number starting from 1 for the highest value in column4.