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internal MCommand(object command, MConnection connection)
{
try
{
this.m_Connection = connection;
switch (connection.ClientProvider)
{
case MClientProvider.MSSQL:
this.m_ClientCommand = new MSSQLCommand(command as System.Data.SqlClient.SqlCommand);
break;
case MClientProvider.ORACLE:
this.m_ClientCommand = new ORACLECommand(command as System.Data.OracleClient.OracleCommand);
break;
case MClientProvider.MySQL:
break;
case MClientProvider.OleDb:
this.m_ClientCommand = new OLEDBCommand(command as System.Data.OleDb.OleDbCommand);
break;
}
this.m_ClientCommand.Connection = connection;
this.m_CommandText = this.m_ClientCommand.CommandText;
this.m_CommandType = this.m_ClientCommand.CommandType;
this.m_CommandTimeout = this.m_ClientCommand.CommandTimeout;
}
catch (Exception ex)
{
throw ex;
}
Loose the switch, and have the connection create[^] a command;
command = connection.CreateCommand();
It'd also be wise to remove the redunant error-handler. Catching an exception merely to rethrow it doesn't make much sense. If you really feel like it, then make it
catch (Exception ex)
{
throw;
}
Bastard Programmer from Hell 
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Seriously, why do you reinvent the wheel, badly.
It's already been done, by Microsoft.
So read up on DBProviderFactories[^] instead. A little on how to use them here[^].
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hello every body 
i'm preparing my first project on database cuz i've just started studying computer science . So i need some help ; i'll be thinkful if someone explain to me the relation that exists between using php as a web programming langage and Mysql ;
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Most introductory books to PHP contain some chapters on MySQL; and vice versa. So I recommend you hit the books.
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many functions are available in php for how to connect to mysql and be interactive between both of them
These functions allow you to access MySQL database servers. More information about MySQL can be found at » http://www.mysql.com/.
Documentation for MySQL can be found at » http://dev.mysql.com/doc/.
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Hello!
I`m creating an application that using Postgres 9.1, a powerful database, steps on toes of the mighty Oracle.
I can`t use Oracle because of it`s price, while Postgres is free and popular. (Microsoft ones are less powerful...)
My question is quite common: How to connect database and C# application? Is there any other way (besides Npgsql lib?)around it?
I`m using VS2010 to create application now.
Thank you.
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Sometime ago, I connected my application to a postgres database for test purposes. I used Npgsql, it works.
I guess ODBC could also be possible, but ODBC is normally not recommended when you can use a specific connection tool (better performance, specific datatypes).
By the way, there are free versions of Oracle available. And during my tests, I found Microsoft SQL Server and Oracle to provide higher performance than postgres (and postgres had higher performance than MySQL), especially when using JOINs with sub queries.
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Thank you for answer Bernard!
Well, my application is going to be sold, so i don`t want for my employer to ask me "What a ...."
So, because Postgres is free for commercial usage (yes, there is a paid edition too, with minor benefits.) and has a quite a lot of data about it. (Most of the users favour linux for some strange reason...")
Oracle... well, it`s size is far larger than Postgres`s ~100mb and the target database itself is several GB`s, Oracle can handle this, without question, but it`s main role is huge enterprise databases of large companies.
I`ve read article on Oracle vs SQL and author shown two pictures: Oracle - Swiss Army Knife, SQL - pink assault rifle toy for kids.
SQL is bad work of Microsoft, more errors per code then in Oracle and Postgres, lower perfomance as well.
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While I will allow the lower performance in Oracle vs SQL Server I would dispute the Swiss/pink comparison. If you are doing anything less that enterprise level database work SQL Server is by far the best (paid) solution. If you can work under 4gb in database size then SQL Server Express is the best "free" solution for your requirements.
Oracle is without doubt the workhorse of databases whereas SQL server is what I call a departmental database. In that area it is the absolute best solution bar none. It has the widest support base of any database, performance is excellent in anything less than enterprise (multi million row tables). Development tools have any other IDE for breakfast (TOAD is a pile of complex crap b/c is designed to sit over Oracle).
If you are expecting to have less than 4gb of data then I would recommend SQL Server Express, if it is greater then I would look very closely at the support resources for the database you choose to use.
Never underestimate the power of human stupidity
RAH
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Hello Mycroft Holmes!
I agree on Oracle.
SQL Server Express is nice solution, but it`s paid (if DB is larger than 4GB) and this is the main problem (Current DB is 3.96 GB and expanding...). I was tasked to create app that require close to zero cash on any 3rd party components (It was, it is and it`ll be - employer always looking for something that would cost 0$ and be as functional, stable and reliable as hell)
So Postgres is a necessary option because it`s free.
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Aleonis wrote: employer always looking for something that would cost 0$ and be as functional
And yet it may end up costing substantial amounts in down stream support. This is something most organisations do not consider and it is well known that support cost are more than development costs!
Still I would hate to lose all the options like postgres so I hope it works and works well and it does sound like it is the right tool for your job.
Never underestimate the power of human stupidity
RAH
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Yeah, it`s like you work as a lead producer in EA and suddenly someone bestows upon you a free Aston Martin DBS... While car is yours for free, it`s repairs, fuel, taxes and other cash drains will become a great burden & start drain your budget. Free gift becoming surgical strike at the company`s budget.
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How can I use database to get the list of those who give feed back to my WEB SITE?
I have designed a small site using PHP to get NAMES and FEED BACK on how nice or poor my WEBSITE IS and it require that i need to use DATABASE SYSTEM in my WEB DESIGN.Did any one know how I can attach DATABASE Program to this small site .Thanks
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Have you bothered to do any research for yourself? Have you tried anything?
"If you think it's expensive to hire a professional to do the job, wait until you hire an amateur." Red Adair.
nils illegitimus carborundum
me, me, me
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You need to make sure that you have a database installed in the same location as your website
with a simple google I found this!
PHP:MySQL Manual[^]
Lobster Thermidor aux crevettes with a Mornay sauce, served in a Provençale manner with shallots and aubergines, garnished with truffle pate, brandy and a fried egg on top and Spam - Monty Python Spam Sketch
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Hi,
PHP-Mysql combination is like bread and butter. First you need to install Mysql. Or use some packages like Wamp server.
Then ,
1. create a database
2. create a table namely 'feedback', with three fields such as dtTime, name , comment.
Create table feedback(dtTime datetime, name varchar(55), comment text);
Then on website create a page for entering user feedback. Then on serverside
<?php
$date = date('Y-m-d H:i:s');
$name = $_POST['email'];
$comment = $_POST['comment'];
mysql_connect("localhost", "root", "");
mysql_select_db('dbname');
$query = "INSERT INTO feedback VALUES($date, '$name', '$comment')";
$res = mysql_query($query);
if($res)
echo "Successfully posted your comment";
?>
for retrieving these comments, write query according to that..
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Then you'd better introduce OP to Bobby Tables[^]
.. or maybe even discover him yourself.
Peter
Software rusts. Simon Stephenson, ca 1994.
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hi everybody
I want to execute a query in excel using Microsoft.ACE.OLEDB.12.0 since database is in dbase iv
query is
SELECT A.EMPCODE,c.EMPNAME,A.REMCODE,emprem,B.REMSHNA,sum(amt_add*nomnt) as amt ;
from d:\staff\file\fbp11 a, d:\staff\file\reim b, d:\staff\file\empl c where a.remcode = b.remcode and a.empcode = c.empcode ;
and !b.reielg and a.emprem in (select emprem from d:\staff\file\fbp11 where month = '201111') group by emprem
but it says "character found after end of sql statement
"
what could be the problem
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Start with removing the semicolons at the end of each line.
A semicolon denotes the end of a statement.
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thanks u 
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I am new in visual studio and i want to know if it is possible to make
some colunms on a report to be dynamic so as to allow a user input for a example i have created this report called: Sales Report
this is how my Sales Report looks likes.
SalesCountry CurrentMonthSales PriorMonthSales
Australia 592.809 619.855
England 270.132 546.596
China 186.928 154.576
As seen above in this report, i want to make CurrentMonthSales,PriorMonthSales colunms dynamic so to allow user input because these fields changes dynamically according to user's criteria.A user may want to view current monthsales of December instead of November.
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I don't think you need dynamic columns. From your descriptions, the columns are fixed i.e. they are SalesCountry, CurrentMonthSales, and PriorMonthsSales. What you need is a dynamic report i.e. data is provided to the report depending on some input criteria. Assuming you are using SQL Server as the database, you need to create a stored procedure that takes a parameter for the current period, then it returns data to your report using those 3 columns. So, the data is dynamic but the columns are fixed.
Since you don't specify what report engine or database you're using, I can't be more specific.
modified 23-Nov-11 17:00pm.
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Hi . I am designing a query . I want to write a trigger that accepts parameters. Is this possible how?
and if not what should I do to solve this ?
Thanks
modified 22-Nov-11 7:01am.
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The subject and the question are completely unrelated to each other.
yousefshokati wrote: can a trigger have parameters?
NO.
yousefshokati wrote: I am designing a query . I want to write a query that accepts parameters. Is
this possible how?
and if not what should I do to solve this
Write a Stored Procedure.
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In SQL Server the trigger has two tables "inserted" and "deleted". These contain all columns in the table effected. Note for a delete query inserted is empty, for an insert deleted is empty.
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