Managing multiple queries optional queries with statement and resultsets


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.

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.

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
------------
Java

I am looking for a way to combine multiple SQL queries to save
having to keep calling the database. I have three tables, one with a
clubs details, one with the club facilities and the third combines
them.


Here is a simple version of the tables:

/>

t1


id, name, city
1, curby, London />2, zoo, Birmingham

t2


id,
facility
1, bar
2, function suite
3, VIP room />

t3


id, club_id, facility_id
1,
2, 1
2, 2, 3
3, 1, 2
4, 2, 2

In
all of the above the firs

Coding

Is it possible to execute multiple queries with the same prepared
statement (same OdbcCommand object)?


Below is
the code I have and is throwing the following exception:
System.Data.Odbc.OdbcException was caught
Message=ERROR
[07006] [IBM][CLI Driver] CLI0102E Invalid conversion.
SQLSTATE=07006


...
odbcConnection
= myConnection.getOdbcConnection();

odbcConnection.Open();
odbcCommand =
odbcConnection.CreateCommand();
odbcTrans =
odbcConnection.BeginTransaction(IsolationLevel.ReadCommitted);

odbcCommand.Transaction = odbcTrans;
try{
Programming Languages

To optimize application speed, everyone always advises to minimize
the number of queries an application makes to the database,
consolidating them into fewer queries that retrieve more wherever
possible.


However, this also always comes with the caution
that data transferred is still data transferred, and just because you
are making fewer queries doesn't make the data transferred
free.


I'm in a situation where I can over-include on the
query in order to cut down the number of queries, and simply remove
the unwanted data in the application code.


Is there any
type of a rule of thumb on how much of a cost there is to each query,
to kn

Coding

Hi guys,
I am not sure if this is a SQL or a PHP
problem.
I am trying to create a script which allows the user to
EASILY export data from inventory and related tables on serverX into a
single .sql file. The file is downloaded from serverX, copied to
serverY and then run as an import.
When creating the export,
there are options for which tables to export, as well as options to
append various update statements to the export file.
The export
file is created by selecting one row at a time from each of the
selected tables, each row of data is then written to the fil
Programming Languages

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