Desconsiderando maiúsculas, minúsculas e acentos com collations no Oracle

Oracle's default comparison is case and accent-sensitive, leading to issues when comparing text variations. The `COLLATE` clause offers a solution for case-insensitive and accent-insensitive comparisons within queries. Using `COLLATE BINARY_CI` ignores case differences but considers accents. `COLLATE BINARY_AI` ignores both case and accents. This is demonstrated with examples comparing 'JOSÉ' and 'Jose'. The queries using `COLLATE BINARY_AI` successfully return a match, unlike the default comparison. `COLLATE` can be applied at the query, table, or column level for consistent case and accent handling. This simplifies data comparisons, especially when dealing with variations in capitalization and accents. Table and column-level collation provides broader application of the case and accent-insensitive comparisons. The provided links offer further information on Oracle's collation options.