


Binary vs. Case-Insensitive Collations: Which is Right for Your MySQL Database?
Comparing Binary and Case-Insensitive Collations: Practical Implications
While exploring the differences between binary and case-insensitive collations in MySQL, the following practical implications emerge:
Sorting Order:
- Binary collations use a byte-by-byte comparison, which may result in umlauts being placed at the end of the alphabet.
- Case-insensitive collations consider the ASCII code points for letters, ignoring letter casing.
Case Sensitivity:
- Binary collations conduct case-sensitive searches, treating 'A' and 'a' as distinct characters.
- Case-insensitive collations disregard letter casing, considering 'A' and 'a' as equivalent.
Character Equality:
- Binary collations do not allow equality between characters with different character codes. For example, 'A' and 'Ä' are not considered equal.
- Case-insensitive collations extend equality to characters with different character codes but the same ASCII code point.
Additional Considerations:
- Binary collations provide faster string comparisons but may produce unnatural sort orders.
- Indexes with binary collations may not always produce expected sorting results but can enhance performance for exact matches.
- For natural sorting and handling of accented characters, case-insensitive collations are preferred.
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