android - DB communication suggestion for web/mobile apps -

-

i have lot of nice ideas develop web , mobile applications, of them need online db communication. however, don't know nothing how configure fresh db server scratch , start queries , requesting it. db basis acquired during graduation.

what don't know use. if need dbms or build own server scratch (which avoid save time).

so, don't want develop db server (back-end, such php, java, etc...). need ready-to-use back-end send queries , request it.

any suggestion, or tutorial how configure it? deploying on aws...

many thanks, in advance!!!

i've developed card game apps use databases leaderboards , multiplayer data. found using http access php scripts in turn access mysql databases , json encode result works , reliable. need write bit of php , set databases other it's quite straightforward. if keep http access in seperate thread in app can visual , input processing whilst waiting result.


Comments

Post a Comment

Popular posts from this blog

python - Subclassed QStyledItemDelegate ignores Stylesheet -

-
i'm trying subclass qstyleditemdelegate remove focus rectangle in qcombobox . even though i'm calling base implementation of paint function , nothing else, result different. looks if parts of style-sheet influence bounding box of item taken consideration. class pstyleditemdelegate(qstyleditemdelegate): def __init__(self, *args, **kwds): super(pstyleditemdelegate, self).__init__(*args, **kwds) def paint(self, *args, **kwargs): qstyleditemdelegate.paint(*args, **kwargs) what have paint unmodified qstyleditemdelegate ? as suggested tried replacing pyside pyqt4 , works, appears bug. update pyside 1.1.2 1.2.1 result same. unfortunately switch breaks other parts of code, if there no other suggestions i'm going accept answer. edit bug tracked here
Read more

java - HttpClient 3.1 Connection pooling vs HttpClient 4.3.2 -

-
i have used httpclient3.1(java) connection pooling below : import org.apache.commons.httpclient.httpclient; import org.apache.commons.httpclient.multithreadedhttpconnectionmanager; import org.apache.commons.httpclient.params.httpclientparams; import org.apache.commons.httpclient.params.httpmethodparams; import org.apache.log4j.logger; public class httpclientmanager { private static logger logger = logger.getlogger(httpclientmanager.class); private static multithreadedhttpconnectionmanager connectionmanager = new multithreadedhttpconnectionmanager(); private static httpclientparams clientparams = new httpclientparams(); static { try { clientparams.makelenient(); clientparams.setauthenticationpreemptive(false); clientparams.setparameter(httpmethodparams.so_timeout, new integer(30000)); // set so_timeout clientparams.setparameter(httpmethodparams.head_body_check_timeout, new integer(3000)); // head responses
Read more

SQL: Divide the sum of values in one table with the count of rows in another -

-
is possible to, in single query, sum bunch of values in 1 table, , divide count of rows in another? there common id/key in both tables... fyi, win points least info provided in question. answer it's possible...here psuedo code since i'm guessing @ tables , columns select summing / counting whynot (select id, sum(whatever) summing where_ever ) inner join (select id, count(1) counting what_ever)b on a.id = b.id question = 'vague' group a.id
Read more