https://www.khanacademy.org/computing/in-class-12-computer-science/x3c7f521fe0287d63:structured-query-language-sql/x3c7f521fe0287d63:functions-in-sql/a/sql-round-and-other-core-functions 2021-04-29T07:49:05Z SQL: ROUND and other core functions article https://www.khanacademy.org/computing/in-class-12-computer-science/x3c7f521fe0287d63:structured-query-language-sql/x3c7f521fe0287d63:functions-in-sql/a/sql-select-with-aggregate-functions 2021-04-29T07:54:09Z SQL: SELECT with aggregate functions article https://www.khanacademy.org/computing/computer-programming/sql/sql-basics/pt/aggregating-data 2022-09-10T01:34:41.474092194Z Aggregating data talkthrough https://www.khanacademy.org/computing/computer-programming/sql/more-advanced-sql-queries/pc/challenge-gradebook 2022-09-10T01:34:41.474092194Z Challenge: Gradebook challenge