SELECT VERSION (); is used to get the current version of MySQL.
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.
What are the drivers in MySQL?
Following are the drivers available in MySQL:
- PHP Driver
- JDBC Driver
- ODBC Driver
- C WRAPPER
- PYTHON Driver
- PERL Driver
- RUBY Driver
- CAP11PHP Driver
- Ado.net5.mxj
What does a TIMESTAMP do on UPDATE CURRENT_TIMESTAMP data type?
TIMESTAMP column is updated with Zero when the table is created. UPDATE CURRENT_TIMESTAMP modifier updates the timestamp field to current time whenever there is a change in other fields of the table.
What is the difference between primary key and candidate key?
Every row of a table is identified uniquely by primary key. There is only one primary key for a table.
Primary Key is also a candidate key. By common convention, candidate key can be designated as primary and which can be used for any foreign key references.
How do you login to MySql using Unix shell?
We can login to MySql through this command:
# [mysql dir]/bin/mysql -h hostname -u <UserName> -p <password>
What does myisamchk do?
myisamchk compress the MyISAM tables, which reduces their disk or memory usage.