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).
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Ques 27. What Is CSV?
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.
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Ques 28. What Is Transaction?
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).
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Ques 29. What Is Commit?
Commit is a way to terminate a transaction with all database changes to be saved permanently to the database server.
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Ques 30. What Is Rollback?
Rollback is a way to terminate a transaction with all database changes not saving to the database server.