mysql - Lot of redundancy in passenger table -


i working on project related ticket booking. can store passenger data i.e. name,age,sex along ticket id in passenger table. problem if ticket booked same passenger have re-enter same passenger data & ticket id differ.

mysql> desc passenger; +-------+-------------+------+-----+---------+-------+ | field | type        | null | key | default | | +-------+-------------+------+-----+---------+-------+ | name  | varchar(32) | no   |     | null    |       | | age   | int(11)     | no   |     | null    |       | | sex   | char(1)     | no   |     | null    |       | | pnr   | varchar(32) | yes  | mul | null    |       | +-------+-------------+------+-----+---------+-------+

can please tell me how can minimize such redundancy?

any link,reference,clue or idea appreciable. thank you

you store passenger entity, consisting of name/age/sex etc. (in passenger entity table) , passenger booking table contain passenger entity ids (integers, guids etc.). form of normalisation.

however may optimisation far. whether depends on how many duplicate entities etc. have, , whether they're real performance/management issue you. e.g. expect store more data passengers (addresses, frequent flyer info etc.).


Comments

Post a Comment

Popular posts from this blog

java.util.scanner - How to read and add only numbers to array from a text file -

i'm learning java , have question regarding reading file want read numbers file contains strings well. here example of file: 66.56 "3 java 3-43 5-42 2.1 1 and here coding: public class test { public static void main (string [] args){ if (0 < args.length) { file x = new file(args[0]); try{ scanner in = new scanner( new fileinputstream(x)); arraylist<double> test = new arraylist<>(); while(in.hasnext()){ if(in.hasnextdouble()){ double f=in.nextdouble(); test.add(f);} else {in.next();} } catch(ioexception e) { system.err.println("exception during reading: " + e); } } my problem add 66.56,2.1 , 1 doesn't add 3 after "3 or ignores 3-43 , 5-42 can tell me how skip strings , add doubles here? thanks all said 3 ie; "3, 3-43 , 4-42 strings either u read string , split , check number @ " , - or put in space between characters , integers. jvm after compilation tre...
Read more

rewrite - Trouble with Wordpress multiple custom querystrings -

i'm working on adding multiple querystring , doesn't seem work. i've found codes seems work others might i'm missing something. i want like: http://mydomain.com/board/?getyear=2013&getsometext2=sometext to http://mydomain.com/board/2013/sometext/ i added code below functions.php file. doesn't seem work should though. this works. echoing querystring gets both variable without problem. http://mydomain.com/board/2013/sometext/ but doesn't. tested querystring vis isset() seems nothing being set/get http://mydomain.com/board/2013/ function add_query_vars($vars) { $vars[] = "getyear"; $vars[] = "getsometext2"; return $vars; } add_filter('query_vars', 'add_query_vars'); function add_rewrite_rules($arules) { $anewrules = array('board/([^/]+)/([^/]+)/?$' => 'index.php?pagename=board&getyear=$matches[1]&getsometext2=$matches[2]'); $arules = $a...
Read more