Managing multiple queries optional queries with statement and resultsets


Neuromaster
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Currently we have a java application which have many different queries and not all are ran at one particular time. Thus for each query we plan to have a new statement and resultset and close them immediately? Below is given the snippet of code for how we run a query now.We have tried to cover each query with try and catch but the problem if the query fails them the rollback is not working on the global level. How best top put them in place to ensure no memory leak too?


try{ //main try outside
//lots of inner queries run based on some logics of if else etc
//sample query of opening and closing both statement and resultsets.

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Related to : Managing multiple queries optional queries with statement and resultsets
Managing multiple queries optional queries with statement and resultsets
Programming Languages

Currently we have a java application which have many different queries and not all are ran at one particular time. Thus for each query we plan to have a new statement and resultset and close them immediately? Below is given the snippet of code for how we run a query now.We have tried to cover each query with try and catch but the problem if the query fails them the rollback is not working on the global level. How best top put them in place to ensure no memory leak too?


try{ //main try outside
//lots of inner queries run based on some logics of if else etc
//sample query of opening and closing both statement and resultsets.

Newb: Managing multiple queries
Programming Languages

I am currently using enterprise manager to run multiple queries on a
single table in a DB. I refresh these queries every few minutes. Due
to the huge number of them I was looking for a better way (or should I
just say "a way") to manage/save these queries so I can recall them
easier/faster for monitoring purposes. Suggestions?
TIA.
Dec 6 07 #1 Post Reply Share this Question 4 Replies (adsbygoogle = window.adsbygoogle || []).push({}); P: n/a
how to join two ResultSets from oracle queries in java
Programming Languages

Is it possible to join two ResultSets like join two tables in Java-oracle programming? I am writing a java program which querys two different oracle databases(the databases are physically in different locations). In the program, sql1 returns ResultSet ret1;sql2 returns ResultSet ret2. Suppose ret1 has the following data:


Id item
------------
1 item1
2 item 2
3 item 3
.........

Ret2 has the following data


Id info
---------
1 info1
2 info2


I need result like this


Id item info
------------
Multiple queries in one statement
15/1/2015 1:10 am Programming Languages

I need to get the following two queries into one statement in PostgreSQL.

select count(*) as REDEEMTOTALUSED 
from voucher 
where campaign_id='123' and redeemcount>0;

select count(*) as REDEEMTOTALUNUSED 
from voucher 
where campaign_id='123' and redeemcount=0;

The result should be the following.

REDEEMTOTALUSED | REDEEMTOTALUNUSED
1               | 9                

Is this possible?




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