The PERCENT_RANK() function is used to calculate the relative rank of a row within a result set as a fraction between 0 and 1. It gives the percentage of rows that are ranked lower than the current row. This function is often used to determine the percentile of a particular value within a dataset. The…

The CUME_DIST() function is used to calculate the cumulative distribution of values within a result set. This function gives you the proportion of values that are less than or equal to the current value in the ordered result set. It’s often used to analyze the relative position of a value within a dataset, especially in…

The NTILE() function is used to distribute the rows of a result set into a specified number of roughly equal-sized “tiles” or groups. Each row is assigned a tile number based on the distribution. This function is often used for data segmentation and percentile calculations, especially when you want to divide your data into quantiles…

The NTH_VALUE() function is used to access the value of a column from the nth row within a result set based on a specified order. This function allows you to retrieve values from rows at a specific position relative to the current row. It’s useful for scenarios where you need to access values from rows…

The LEAD() function is used to access the value of a column in a subsequent row within the same result set. This function is often used to compare values between the current row and the next row, or to retrieve values from “leading” rows relative to the current row based on a specified order. It’s…

The LAG() function is used to access the value of a column in a preceding row within the same result set. This function allows you to compare values between the current row and the previous row or to retrieve values from “lagging” rows relative to the current row based on a specified order. The syntax…

The ROW_NUMBER() function is used to assign a unique integer to each row within a result set. This function is often used to generate consecutive integers based on the specified ordering criteria. It’s useful for scenarios where you need a sequential identifier for each row, such as ranking, pagination, and generating unique row identifiers. The…

The LAST_VALUE() function is used to retrieve the last value in an ordered set of rows within a result set. Similar to the FIRST_VALUE() function, the LAST_VALUE() function operates within a window of rows defined by the OVER clause, and it’s often used to get the latest or last occurrence of a certain value within…

The FIRST_VALUE() function is used to retrieve the first value in an ordered set of rows within a result set. This function is often used in combination with the OVER clause to perform calculations on a window of rows, and then extract the first value from that window. It’s useful for scenarios where you want…

The DENSE_RANK() function is used to assign a unique rank to each row within the result set, similar to the RANK() function. However, unlike the RANK() function, the DENSE_RANK() function doesn’t leave gaps in ranking when there are ties (rows with equal values). Instead, it assigns the same rank to rows with the same values…