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Applies to ❌ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
Computed columns, sometimes also called "virtual" columns, are columns that are generated from an expression based on other columns of the same row directly in the database. They cannot be written to, but may be used in projections, filters, and even indexes, as a complement or replacement of function based indexes.
See the section about computed columns in CREATE TABLE for more details.