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Overview → Indexes → Strategies → Advanced → Installation → Maintenance
Omnidex indexes come in four flavors. Basic Omnidex indexes are used to optimize criteria, table joins, aggregations and ordering. QuickText indexes are used to index small text fields, such as name and address, product descriptions and general text. FullText indexes are used to index large blocks of text. Custom indexes are advanced indexes that may have specialized options that are appropriate for specific situations.
Basic Omnidex indexes are installed on columns that are involved in Omnidex criteria, table joins, aggregations and ordering.