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What is the use of collation in MySQL?
A collation is a set of rules that defines how to compare and sort character strings. Each collation in MySQL belongs to a single character set. Every character set has at least one collation, and most have two or more collations. A collation orders characters based on weights.
What encoding does MySQL use?
The UTF-8 character encoding set supports many alphabets and characters for a wide variety of languages. Although MySQL supports the UTF-8 character encoding set, it is often not used as the default character set during database and table creation.
What is collation latin1_swedish_ci in MySQL?
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 cursor in MySQL?
In MySQL, a cursor allows row-by-row processing of the result sets. A cursor is used for the result set and returned from a query. By using a cursor, you can iterate, or step through the results of a query and perform certain operations on each row.
What is coalesce in MySQL?
The MySQL COALESCE() function is used for returning the first non-null value in a list of expressions. The value returned by the MySQL COALESCE() function is the first non-null value in a list of expressions or NULL if all the values in a list are NULL.
What must be declared in MySQL cursor?
When working with MySQL cursor, you must also declare a NOT FOUND handler to handle the situation when the cursor could not find any row. Because each time you call the FETCH statement, the cursor attempts to read the next row in the result set.
How to show all collations in MySQL by default?
By default, the SHOW COLLATION statement displays all available collations. It takes an optional LIKE or WHERE clause that indicates which collation names to display. For example, to see the collations for the default character set, latin1 (cp1252 West European), use this statement:
How to list the display collations for a character set?
It takes an optional LIKE or WHERE clause that indicates which character set names to match. For example: A given character set always has at least one collation, and most character sets have several. To list the display collations for a character set, use the INFORMATION_SCHEMA COLLATIONS table or the SHOW COLLATION statement.
How to display multiple character sets in MySQL?
MySQL Server supports multiple character sets. To display the available character sets, use the INFORMATION_SCHEMA CHARACTER_SETS table or the SHOW CHARACTER SET statement. A partial listing follows. For more complete information, see Section 10.10, “Supported Character Sets and Collations” .
When to use the LIKE clause in MySQL?
The LIKE clause, if present, indicates which collation names to match. The WHERE clause can be given to select rows using more general conditions, as discussed in Section 26.8, “Extensions to SHOW Statements”. For example: