2.3 Unicode Collation Algorithm

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2 Database Administration : 2.3 Unicode Collation Algorithm

The Unicode Collation Algorithm (UCA) is a specification (Unicode Technical Report #10) that defines a customizable method of collating and comparing Unicode data. Collation means how data is sorted as with a SELECT … ORDER BY clause. Comparison is relevant for searches that use ranges with less than, greater than, or equal to operators.
Note: In addition, another advantage for using ICU collations (the implementation of the Unicode Collation Algorithm) is for performance. Sorting tasks, including B-tree index creation, can complete in less than half the time it takes with a non-ICU collation. The exact performance gain depends on your operating system version, the language of your text data, and other factors.

2 Database Administration : 2.3 Unicode Collation Algorithm

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