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MySQL 8.0 is a major release of the MySQL database system. Key differences include improved JSON functionality, better query performance with window functions and Common Table Expressions (CTEs), support for Unicode 9.0, and enhancements to security with improved authentication and encryption.
CTEs are temporary result sets that simplify complex queries by breaking them into manageable parts. They can be recursive or non-recursive and are defined using the WITH keyword.
MySQL 8.0 introduces new JSON functions, such as JSON_TABLE, which allows querying JSON data as if it were a table. It also supports efficient indexing for JSON fields using generated columns.
Window functions allow performing calculations across a set of rows related to the current row without collapsing the result set. Functions like ROW_NUMBER(), RANK(), and LAG() provide advanced analytical capabilities.
TESTED 18 Dec 2024
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