What storage engines are used in MySQL?
Storage engines are called table types and data is stored in files using various techniques. Technique involves: Storage mechanism Locking levels Indexing Capabilities and functions.
How to get current MySQL version?
SELECT VERSION (); is used to get the current version of MySQL.
Give string types available for column?
The string types are: SET BLOB ENUM CHAR TEXT VARCHAR
Difference between CHAR and VARCHAR?
Following are the differences between CHAR and VARCHAR: CHAR and VARCHAR types differ in storage and retrieval CHAR column length is fixed to the length that is declared while creating…
Define REGEXP?
REGEXP is a pattern match in which matches pattern anywhere in the search value.
What is the usage of ENUMs in MySQL?
ENUM is a string object used to specify set of predefined values and that can be used during table creation. Create table size(name ENUM('Small', 'Medium','Large');
How to represent ENUMs and SETs internally?
ENUMs and SETs are used to represent powers of two because of storage optimizations.
Differentiate CHAR_LENGTH and LENGTH?
CHAR_LENGTH is character count whereas the LENGTH is byte count. The numbers are same for Latin characters but they are different for Unicode and other encodings.
Differentiate between FLOAT and DOUBLE?
Following are differences for FLOAT and DOUBLE: • Floating point numbers are stored in FLOAT with eight place accuracy and it has four bytes. • Floating point numbers are stored…
What are the advantages of MySQL when compared with Oracle?
MySQL is open source software which is available at any time and has no cost involved. MySQL is portable GUI with command prompt. Administration is supported using MySQL Query Browser