MySQL 5.7 Reference Manual :: 10 Globalization :: 10.1 Character Set Support :: 10.1.7 Collation Issues :: 10.1.7.4 Collations Must Be for the Right Character Set

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10.1.7 Collation Issues
10.1.7.1 Collation Names
10.1.7.2 Using COLLATE in SQL Statements
10.1.7.3 COLLATE Clause Precedence
10.1.7.4 Collations Must Be for the Right Character Set
10.1.7.5 Collation of Expressions
10.1.7.6 The _bin and binary Collations
10.1.7.7 The BINARY Operator
10.1.7.8 Examples of the Effect of Collation
10.1.7.9 Collation and INFORMATION_SCHEMA Searches

10.1.7.4 Collations Must Be for the Right Character Set

Each character set has one or more collations, but each collation is associated with one and only one character set. Therefore, the following statement causes an error message because the latin2_bin collation is not legal with the latin1 character set:

mysql> SELECT _latin1 'x' COLLATE latin2_bin;
ERROR 1253 (42000): COLLATION 'latin2_bin' is not valid
for CHARACTER SET 'latin1'

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