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SQL refers to Structured Query Language, a kind of language used to access, update and manipulate database. In SQL, ROLLBACK is a command that causes all data changes since the last START TRANSACTION or BEGIN to be discarded by the relational database management systems (RDBMS), so that the state of the data is "rolled back" to the way it was before those changes were made.
Issuing the commands ROLLBACK or COMMIT will also discard any savepoints created since the start of the main transaction. Savepoints are defined in the SQL standard and are supported by all established SQL relational databases, including PostgreSQL , Oracle Database , Microsoft SQL Server , MySQL , IBM Db2 , SQLite (since 3.6.8), Firebird , H2 ...
The caretaker is going to do something to the originator, but wants to be able to undo the change. The caretaker first asks the originator for a memento object. Then it does whatever operation (or sequence of operations) it was going to do. To roll back to the state before the operations, it returns the memento object to the originator.
The File Retrieval and Editing System, developed starting in 1968 at Brown University, is reported to be the first computer-based system to have had an "undo" feature. [5] [6] Warren Teitelman developed a Programmer's Assistant as part of BBN-LISP with an Undo function, by 1971. [7] The Xerox PARC Bravo text editor had an Undo command in 1974. [8]
For example, in an adventure game, it may autosave after completing a level or mission, or in fighting games, it might save after winning a match. Such points are called savepoints; sometimes the distinction from a checkpoint is blurred. Some games use autosave as the only method of saving data, and the player must complete a set amount of the ...
A function definition starts with the name of the type of value that it returns or void to indicate that it does not return a value. This is followed by the function name, formal arguments in parentheses, and body lines in braces. In C++, a function declared in a class (as non-static) is called a member function or method.
Transactions have a number of advantages over independent database updates. One of the main advantages is that transactions can be abandoned if a problem occurs during the transaction. This is called rolling back the transaction, or just rollback, and it restores the state of the database records to precisely the state before the transaction began.
I think this is the closest to what you're asking. If you create a separate settings file you can edit the XML in that. I've done it before; prepare the replacement XML code in something that allows a formula like Excel and use that to generate the XML code based on your find and replace field names. The key part of the settings XML is this bit: