Flashback Examples

Flashback Examples 8,1/10 2719 reviews

In screenwriting, at some point you will hear that using flashbacks is considered “bad” or is a sign of an “amateur”. In the screenplays where the writer has completely abused the flashback technique — I agree. However, when used creatively, flashbacks can be a very powerful technique. Just make sure that your use of flashbacks pays off dramatically. Below are twelve good movies where flashbacks are used throughout the story and gets it right.

Tips On How To Write Flashbacks

Flashback triggers may also change as an individual progresses through life. For example, a person who was abused in childhood may experience onset or re-emergence of flashbacks if they have a child who is the same age they were when their own abuse began. Flashback definition: The definition of a flashback is when an earlier moment is portrayed in a story or when a past experience is remembered. (noun) An example of a flashback is suddenly remembering a scene from the war.

There isn’t a right or wrong way to write flashbacks, but depending on how you want the flashback to be shown visually you may want to write it a certain way. For instance, you could insert the word “FLASHBACK” in the same line as your location if you want the flashback to appear like a montage.

FLASHBACK – GRAVEYARD

Sam raises from an unmarked grave and gasps.

A ZOMBIE chokes him from behind.

Sam fights him off — but five more zombies tackle him as he tries to run.

BACK TO PRESENT DAY

Another way to write a flashback is by just inserting it into the location and write the scene as you would normally do. For example:

FLASHBACK – INT. HOTEL SUITE – NIGHT

Flashback story starters

However you decide to write your flashbacks, just make sure it does not interrupt the flow of your story. Often times writers can get so caught up into adding so many flashbacks that it becomes hard to follow the basic plot.

Learn to Write Stronger Story Concepts, Themes & Loglines

There’s a saying that “Concept is King”. I tend to agree with this. Think about it. The concept of your story is the overall idea at its most basic core. It’s what makes us want to read your book, screenplay or see your movie after millions of dollars has been spent on developing it. You‘ve probably read a book or screenplay that was well written with lots of clever wordplay, but when’s the last time you have heard anyone excited about a mediocre concept? For me, concept is king, but execution is just as important. After all, what good is a cool idea if the author can’t tell the story in the best way it could possibly be told? Imagine if the movie “Karate Kid” was just a movie about a boy learning karate and receiving a black belt at the end to make his single mother proud. What if “The Godfather” was just about an old mob boss who ran his organization with an iron fist then just died at the end of the movie. How would that be any different from the thousands of mob flicks we’ve never even heard of with forgettable plots? These are concepts you most likely would forget an hour after watching them on the big screen.

How to Name Your Fictional Characters (Plus More Than 2,500 Names & Meanings To Get Your Creative Juices Flowing)

You know what’s just as bad as hitting a brick wall with the plot of your screenplay or novel? Hitting that same brick wall even harder when it comes time to give your protagonist or any other character that perfect name. Having the right name for your characters not only helps them to become memorable, but can help sell the story as well. Sebastian Dangerfield (“The Ginger Man”), Tony Starks (“Iron Man”), Atticus Finch (“To Kill A Mockingbird”), Luke Skywalker (“Star Wars”), James Bond (“Casino Royale”)…the list goes on. Imagine pitching your screenplay or novel with any of these character names.

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Expert Oracle Database Tips by Donald BurlesonMarch 25, 2015

RMAN - Oracle Flashback Query

Using Oracle flashback query, you can retrieve the committed data as it was at a past point in time. As most of other flashback technologies, this feature retrieves data from the undo tablespace. It is possible to get undo data based on a specific time or scn number. Using the select as of statement with both OF TIMESTAMP and OF SCN clauses, you can use this feature easily. It can even be performed by any application developer without any DBA intervention. Developers can use the dbms_flashback package to perform flashback query directly from their applications, but the execute privilege should be granted on the dbms_flashback package. Now see it in action through the following scenario:

  • Scenario 1: At 12.00, Bob got a call from an application developer who told him that somebody deleted all the rows from one of the tables by omitting the WHERE clause and committing the transaction. He wanted to know which rows were deleted from the table. Bob decided to use flashback query to get the before image of the deleted rows.

To test a case similar to Bob's situation, perform the following steps:

  1. Create a table as it was created by the application developer and query it as follows:

SQL>
create
table tbl_seg_tbs as
2 select
segment_name, tablespace_name
from
dba_segments
3 where
rownum<7
order by
bytes desc;
Table created.
SQL>
select
count(*)
from
tbl_seg_tbs;
COUNT(*)
----------
6
SQL>

  1. In order to return back to this state of the table anytime, get the current scn number and timestamp:

SQL>
select
to_char(sysdate,'dd-mm-yyyy hh24:mi:ss') ddate,
dbms_flashback.get_system_change_number() scn from dual;
DDATE SCN
-------------------- ----------
07-02-2010 15:14:21 460141

This step was not performed by Bob or by the application developer. The developer knows the time when the table was in a correct state and told that time to Bob. Here you get the date and current scn number just for testing purposes.

Retrieved January 6, 2018. Lizard iguana. December 20, 2017. From the original on January 2, 2018. Retrieved January 6, 2018.

  1. Now run the delete command to clear the table and commit the transaction:

SQL>
delete from
tbl_seg_tbs;
6 rows deleted.
SQL>
commit;
Commit complete.
SQL>
select * from
tbl_seg_tbs;
no rows selected

  1. As Bob knows the exact time of the correct state of the table, he uses flashback query and retrieves the before state of deleted rows from the undo tablespace as follows:

SQL>
select
count(*)
from tbl_seg_tbs
2 as of
timestamp to_timestamp('07-02-2010 15:14:21','dd-mm-yyyy hh24:mi:ss');
COUNT(*)
----------
6
SQL>

In case he knows the scn number, he uses the OF SCN clause to view the data of the table at the specified scn as follows:

SQL>
select * from
tbl_seg_tbs
2 as of scn 460135;
COUNT(*)
----------
6
SQL>

To view the data of the table as it was 15 minutes ago, use the following query:

SQL>
select
count(*)
from tbl_seg_tbs
2 as of timestamp (systimestamp -interval '15' minute);
COUNT(*)
----------
6
SQL>

It is possible to convert scn to timestamp and timestamp to scn using scn_to_timestamp and timestamp_to_scn functions:

SQL>
select scn_to_timestamp(460141) ddate,
timestamp_to_scn(to_timestamp('07-02-2010 15:14:21','dd-mm-yyyy
hh24:mi:ss')) scn from dual;
DDATE SCN
------------------------------------ ----------
07-FEB-10 03.14.21.000000000 PM 460141

SQL>

Viewing/Retrieving the Dropped PL/SQL Object codes using Flashback Query

You can retrieve any dropped PL/SQL object using flashback query. How? It is very easy. The source of these objects is stored in an internal table: sys.source$. It means that when you create a trigger, the line that contains its source is added to that table. The same works for dropping the procedure. Please note that recreating the objects relies on the dependencies being valid; thus, any tables/views referenced in the procedure must be present or recreated before recreating the procedure. So see how it works:

  1. Create a simple trigger and get the current scn valueof the database:

SQL>
create or replace
trigger trg_logon
2 after logon on database
3 begin
4 insert into tbl_logons values(sysdate, user);
5 end;
6 /
Trigger created.
SQL>
select
current_scn
from
v$database;
CURRENT_SCN
-----------
528857
SQL>

  1. Now drop the trigger.

SQL>
drop
trigger trg_logon;
Trigger dropped.
SQL>

  1. Using the scn value that has been noted before dropping the trigger, query the dba_source view as follows:

SQL>
select
text
from dba_source
as of
scn 528857
2 where name='trg_logon';
TEXT
---------------------------------------------------
trigger trg_logon
after logon on database
begin
insert into tbl_logons values(sysdate, user);
end;
SQL>

Using the about result text code, you can create or replace the trigger again.

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