Database

24-Nov-11 21:58

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.

Bernhard Hiller24-Nov-11 23:51

Bernhard Hiller

24-Nov-11 23:51

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.

Aleonis25-Nov-11 0:12

25-Nov-11 0:12

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.

Mycroft Holmes25-Nov-11 0:52

Mycroft Holmes

25-Nov-11 0:52

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

Aleonis25-Nov-11 1:13

25-Nov-11 1:13

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.

Mycroft Holmes25-Nov-11 12:30

Mycroft Holmes

25-Nov-11 12:30

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

Aleonis25-Nov-11 22:24

25-Nov-11 22:24

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.

Using database

idbee2k322-Nov-11 5:22

idbee2k3

22-Nov-11 5:22

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

R. Giskard Reventlov22-Nov-11 23:11

R. Giskard Reventlov

22-Nov-11 23:11

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

Simon_Whale22-Nov-11 23:49

Simon_Whale

22-Nov-11 23:49

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

Satheesh154623-Nov-11 6:08

Satheesh1546

23-Nov-11 6:08

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..

character found after end of sql statement

Peter_in_278023-Nov-11 13:10

Peter_in_2780

23-Nov-11 13:10

Then you'd better introduce OP to Bobby Tables[^]
.. or maybe even discover him yourself.

Peter

Software rusts. Simon Stephenson, ca 1994.

chandru7021-Nov-11 23:36

chandru70

21-Nov-11 23:36

hi everybody

I want to execute a query in excel using Microsoft.ACE.OLEDB.12.0 since database is in dbase iv

query is

SQL

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

Re: character found after end of sql statement

Jörgen Andersson21-Nov-11 23:49

Jörgen Andersson

21-Nov-11 23:49

Start with removing the semicolons at the end of each line.
A semicolon denotes the end of a statement.

Light moves faster than sound. That is why some people appear bright, until you hear them speak.
List of common misconceptions

Re: character found after end of sql statement

chandru7022-Nov-11 16:52

chandru70

22-Nov-11 16:52

thanks u

How to add Dynamic Colunms in a report

Bonginkoci21-Nov-11 23:21

Bonginkoci

21-Nov-11 23:21

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.

Re: How to add Dynamic Colunms in a report

SilimSayo22-Nov-11 6:16

SilimSayo

22-Nov-11 6:16

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.

can a trigger have parameters

yousefshokati21-Nov-11 19:42

yousefshokati

21-Nov-11 19:42

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.

Re: can a trigger have parameters?

Shameel21-Nov-11 22:51

Shameel

21-Nov-11 22:51

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.

Corporal Agarn22-Nov-11 3:01

Corporal Agarn

22-Nov-11 3:01

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.

yousefshokati22-Nov-11 19:33

yousefshokati

22-Nov-11 19:33

thanks for your attention . I know that we have those tables in triggers . I am not doing dml action to effect them .
I have a query that returns some "Personnel Codes" that these codes should be in the trigger as input . Now I am looking a way to solve this problem .
thanks

SilimSayo23-Nov-11 10:59

SilimSayo

23-Nov-11 10:59

It is difficult to decipher what you really mean but let me take a a guess. You have a query that returns Personnel codes... I am assuming that you want to do something with personnel codes. If you are to use a trigger, then you must be peforming inserts, updates or deletes in a table. You said you're not doing DML, so triggers don't apply!

You don't describe the problem in sufficient detail but I'll make a guess. You're getting some values using a query and you want to do something based on the results returned. I think you need to do everything in a stored procedure.

Your stored procedure would have a section that queries for personnel codes.
It would also have a section that performs some action based on the personnel codes.

If you would describe the problem in sufficient detail, it would be easier to help. I would also suggest tha you avoid describing the problem in terms of the solution i.e. your problem description presupposes that triggers are the answer. Just state the problem in sufficient detail.