What is MySQL collation types?

A MySQL collation is a set of rules used to compare characters in a particular character set. Each character set in MySQL has at least one default collation. … By convention, a collation for a character set begins with the character set name and ends with _ci (case insensitive) _cs (case sensitive) or _bin (binary).

What is default collation in MySQL?

The default MySQL server character set and collation are latin1 and latin1_swedish_ci , but you can specify character sets at the server, database, table, column, and string literal levels.

What is MySQL UTF-8 collation?

Overview. The default character set for MySQL at (mt) Media Temple is latin1, with a default collation of latin1_swedish_ci. This is a common type of encoding for Latin characters. You can also change the encoding. utf8 is a common character set for non-Latin characters.

What is utf8mb4_0900_ai_ci collation?

What is the meaning of the MySQL collation utf8mb4_0900_ai_ci? uft8mb4 means that each character is stored as a maximum of 4 bytes in the UTF-8 encoding scheme. … (The Unicode Collation Algorithm is the method used to compare two Unicode strings that conforms to the requirements of the Unicode Standard).

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What is charset and collation in MySQL?

A character set is a set of symbols and encodings. A collation is a set of rules for comparing characters in a character set. … The collation is a set of rules (only one rule in this case): “compare the encodings.” We call this simplest of all possible collations a binary collation.

What is table collation?

Collation is a set of rules that tell database engine how to compare and sort the character data in SQL Server. Collation can be set at different levels in SQL Server.

Which is the best collation for MySQL?

It is best to use character set utf8mb4 with the collation utf8mb4_unicode_ci . The character set, utf8 , only supports a small amount of UTF-8 code points, about 6% of possible characters. utf8 only supports the Basic Multilingual Plane (BMP).

What is the difference between utf8mb4_general_ci and utf8_general_ci?

utf8mb4_unicode_ci is based on the official Unicode rules for universal sorting and comparison, which sorts accurately in a wide range of languages. utf8mb4_general_ci is a simplified set of sorting rules which aims to do as well as it can while taking many short-cuts designed to improve speed.

What is the difference between UTF-8 and latin1?

They are different encodings (with some characters mapped to common byte sequences, e.g. the ASCII characters and many accented letters). UTF-8 is one encoding of Unicode with all its codepoints; Latin1 encodes less than 256 characters.

What is charset utf8mb4?

utf8mb4 : A UTF-8 encoding of the Unicode character set using one to four bytes per character. utf8mb3 : A UTF-8 encoding of the Unicode character set using one to three bytes per character.

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What is collation name?

A collation name starts with the name of the character set with which it is associated, generally followed by one or more suffixes indicating other collation characteristics. For example, utf8mb4_0900_ai_ci and latin1_swedish_ci are collations for the utf8mb4 and latin1 character sets, respectively.

What is character set give example?

A defined list of characters recognized by the computer hardware and software. Each character is represented by a number. The ASCII character set, for example, uses the numbers 0 through 127 to represent all English characters as well as special control characters.

What is Cyrillic characters for collation?

The Cyrillic character sets and collations are for use with Belarusian, Bulgarian, Russian, Ukrainian, and Serbian (Cyrillic) languages.

  • cp1251 (Windows Cyrillic) collations: cp1251_bin. …
  • cp866 (DOS Russian) collations: cp866_bin. …
  • koi8r (KOI8-R Relcom Russian) collations: koi8r_bin. …
  • koi8u (KOI8-U Ukrainian) collations:

What is the difference between charset and collation?

A character set is a set of characters while a collation is the rules for comparing and sorting a particular character set. For example, a subset of a character set could consist of the letters A , B and C . … Each character set also has one default collation. The latin1 default collation is latin1_swedish_ci .

What is binary collation?

Binary collation compares your string exactly as strcmp() in C would do, if characters are different (be it just case or diacritics difference). The downside of it that the sort order is not natural.

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