1 :: What Is MySQL?
MySQL is an open source database management system developed by MySQL AB, http://www.mysql.com. 2 :: What Is mSQL?
Mini SQL (mSQL) is a light weight relational database management system capable of providing rapid access to your data with very little overhead. mSQL is developed by Hughes Technologies Pty Ltd.
MySQL was started from mSQL and shared the same API. 3 :: What Is SQL?
SQL, SEQUEL (Structured English Query Language), is a language for RDBMS (Relational Database Management Systems). SQL was developed by IBM Corporation. 4 :: What Is Table?
A table is a data storage structure with rows and columns. 5 :: What Is Column?
A column defines one piece of data stored in all rows of the table. 6 :: What Is Row?
A row is a unit of data with related data items stored as one item in one column in a table. 7 :: What Is Primary Key?
A primary key is a single column or multiple columns defined to have unique values that can be used as row identifications. 8 :: What Is Foreign Key?
A foreign key is a single column or multiple columns defined to have values that can be mapped to a primary key in another table. 9 :: What Is Index?
An index is a single column or multiple columns defined to have values pre-sorted to speed up data retrieval speed. 10 :: What Is View?
A view is a logical table defined by a query statement.
11 :: What Is Join?
Join is data retrieval operation that combines rows from multiple tables under certain matching conditions to form a single row.
12 :: What Is Union?
Join is data retrieval operation that combines multiple query outputs of the same structure into a single output.
13 :: What Is ISAM?
ISAM (Indexed Sequential Access Method) was developed by IBM to store and retrieve data on secondary storage systems like tapes.
14 :: What Is MyISAM?
MyISAM is a storage engine used as the default storage engine for MySQL database. MyISAM is based on the ISAM (Indexed Sequential Access Method) concept and offers fast data storage and retrieval. But it is not transaction safe.
15 :: What Is InnoDB?
InnoDB is a transaction safe storage engine developed by Innobase Oy (an Oracle company now).
BDB (BerkeleyDB) is transaction safe storage engine originally developed at U.C. Berkeley. It is now developed by Sleepycat Software, Inc. (an Oracle company now).
CSV (Comma Separated Values) is a file format used to store database table contents, where one table row is stored as one line in the file, and each data field is separated with comma.
A transaction is a logical unit of work requested by a user to be applied to the database objects. MySQL server introduces the transaction concept to allow users to group one or more SQL statements into a single transaction, so that the effects of all the SQL statements in a transaction can be either all committed (applied to the database) or all rolled back (undone from the database).
Commit is a way to terminate a transaction with all database changes to be saved permanently to the database server.
Rollback is a way to terminate a transaction with all database changes not saving to the database server.
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