The source for this problem can be found http://www.wellytop.com/SQLProblem.zip
This test creates two threads each with a database connection and uses transactions to insert values into the same table.
The objective of this test is to check that a thread cannot read the results from a pending transaction on a different thread.
In effect this checks dirty reads do not happen and transaction locking.
The test runs correctly and displays "PASSED" with MySQL indicating the transaction and threading worked.
When running with MSSQL Express 2005 it reports a deadlock error during a transaction.
It's not really possible to re-run the transaction and I would like MS SQL to operate similar to MySQL, i.e. MySQL waits for the other transaction to finish before the next transaction can operate on those table rows. I'd like to use MSSQL but I am wondering why this error doesn't happen with MySQL and so have, for the moment, chosen to use it as my preferred database solution.
I have experimented with transaction isolation levels and this doesn't seem to solve the problem.
I've tested this with a fresh install of Windows XP SP2 and no firewall turned on.
To run this test with MSSQL Express2005 use the ODBC Data Source Administrator (odbcad32.exe) to create a data source named MyExpressTest and attach this to an empty database that has been created with the default values. Enable the #define MSSQL in the coude otherwise it tests with MySQL.
To run this test with MySQL (to show how this test should work) use the ODBC Data Source Administrator (odbcad32.exe) to create a data source named mySQLNewTest and attach this to an empty database that has been created with the default values. Comment out the #define MSSQL to switch to MySQL mode.
I'm a beginner programmer and databases are still a bit of a mystery to me. I have some basic questions that I can't find direct answers for anywhere but which I think should be fairly simple for someone acquainted with using databases in programming.
1. MySQL & MS SQL Server (or Express)...what's the difference? Are they mutually compatible? Are all SQL files written in the same file format?
2. If I write create a MySQL database on my website to store customer data, can my application which was written with VB 2005 Express (and which uses MS SQL Server Express) read those database files? Vice-versa?
3. If I create a MS SQL database in VB express for my application, is that database on some huge central server somewhere or is my computer used as the server, or what? (yeah, I know that's probably a really stupid question but I can find the answer in any of the three programming books I've bought in recent months or online either.)
4. I've read the MySQL is free unless I use the databases within an actual application from which I'm making money, in which case I need to buy a license. What about MS SQL Server or MS SQL Express? Microsoft can be so withholding about what costs money, what is free, and what is temporarily free.
That's all for now...I hope someone can answer my stupid questions.
Hello all, I spent the last two days trying to find an application that can export a mySQL database into msSQL syntax so that I can then use that to just create my msSQL database. I have had no such luck, though I could find a bunch to do msSQL to mySQL. Please let me know if anyone has one or knows of one that works because I really do not want to hand port my 70 table database from mySQL to msSQL Thanks in advance, Anthony F Greco
i have dumped a mysql database to my my documents folder on my server, how can i convert this to a mssql database.
the database came from a site that was in php and of course using mysql, the database has all the users logon information and other information in there personal profile. i would like to convert this to a mssql database and connect it to the new site i am doing in .net/C#
Hi, I've been coding in C#/ASP.NET for a little while now, but I've only ever used MS SQL.I'm starting a new project at work soon, and our host provides free MySQL databases but charges for MS SQL databases. What are the pros/cons for each of these databases, and how much conversion would be required in an existing C#/ASP.NET application if I wanted to change from MS SQL to MySQL? I assume the syntax/commands to operate a C# app with MS SQL are different to the ones required to communicate with a MySQL database? I'll probably stick with MS SQL because it's what I know, but I'd like to get familiar with MySQL as it might come in handy one day.Thanks, any information is greatly appreciated.
I was asked to program a site in coldfusion using mssql, but i have only used mysql in the past. i heard mssql has all the functions mysql has, but mysql does not have everything mssql does.. so if i programmed it in mysql, it should work? right? is there a free download to test mssql or only a buy version?
hi,all i have a database in MySQL with approximately 1600 records that must be converted into MSSQL. There are too many converters but they are not free to download. What would you recommend me to do among several solutions like first converting to access or excel and then importing them into MSSQL etc..? Thanks all in advance.
i need a simple way to do this since im gonna need to do it every single week most probably so any help would be apreciated. if i dont have anything by monday it start coding one. Btw im using mysql 5 and SQL server express 2005
Hi! How can i convert this code to work with MsSQL 2005? /Tomas Partial Class skaalb Inherits System.Web.UI.Page
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click Dim strConnectionString As String Dim strQuery As String Dim MyConnection As OdbcConnection Dim myCommand As OdbcCommand
Dim path As String = Server.MapPath("~/album") & "/" Dim albName As String = Trim(Replace(txtAlbum.Text, "'", "''")) Dim folderName As String = Trim(Replace(txtAlbum.Text, "'", "''")) folderName = Replace(folderName, " ", "_")
Try If Not My.Computer.FileSystem.DirectoryExists(path & folderName) Then
Hello, I'm trying to use sql to create a db, but the file the guy gave me is MySql. I tried a few things, and then I asked him to try to migrate it to MSSql for me, but it's still giving me this error:
Msg 102, Level 15, State 1, Line 1 Incorrect syntax near 'meteor'.
Hi i have recently developed a perl/mysql application but now i need to migrate all my databases and tables from mysql to mssql can anybody explain the simplest way to do this. I already have used Mysql's migration toolkit to migrate from access to mysql does mssql have any tools like this? Please let me know
I'm converting to mssql. I've been using the following statement in a php query with mysql.
$result = mysql_query ("SELECT * FROM inks i, sample s, customer c, press pr WHERE s.JobNum like '$JobNum%' and c.CustName like '$CustName%' and pr.PressID like '$PressID%' and s.InkID like'$InkID%' and c.CustNum=s.CustNum and pr.PressID=s.PressID and i.InkID=s.InkID and s.Bindery like'%$Bindery%'"); This allowed me to select a press and/or certain paper and/or certain ink, etc. Allowed me to select any combination needed to find.
Now when I use this statement I don't get any results. I have the following which works if I select items in all categories, but that isn't always possible. I need a wildcard selection if we don't know or don't care what press it was run on or what paper was run on a press or what ink was used to print, etc
$result = mssql_query ("SELECT * FROM text t, cover cv, sample s, customer c, press p WHERE (s.PressID like '$PressID' and p.PressID = s.PressID and c.CustNum=s.CustNum and t.TextPaperID=s.PaperTextID and cv.CoverPaperID=s.PaperCoverID) and (s.PaperTextID = '$TextPaperID' and t.TextPaperID=s.PaperTextID and p.PressID = s.PressID and c.CustNum=s.CustNum and cv.CoverPaperID=s.PaperCoverID) and (s.PaperCoverID = '$CoverPaperID' and t.CoverPaperID=s.PaperCoverID and p.PressID = s.PressID and c.CustNum=s.CustNum and cv.TextPaperID=s.PaperTextID) order by CustName");
I'm developing website for online test/assessments and I want to know what database is best for my project between Mysql and MSsql. There will be a lot of users writing concurently/ similtaneously to database.
I am looking for a function in MSSQL that performs similar to the LIMIT function in MySQL. Here is the LIMIT function's definition:
The LIMIT clause can be used to constrain the number of rows returned by the SELECT statement. LIMIT takes one or two numeric arguments, which must be integer constants.
With two arguments, the first argument specifies the offset of the first row to return, and the second specifies the maximum number of rows to return. The offset of the initial row is 0 (not 1):
I have to port a database from MSSQL to MySQL. I'm really a newbie with MSSQL and I need some hints on how to do this task.
I received a .bak file which my boss told me that this a backup of the database I have to port.
Then I installed MSQL 2000 developer edition on my workstation and then started playing with it.
The problem is that I don't know how to connect to the database... and with what application do some queries. In mysql I use phpMyAdmin which is really useful. Is there something similar for SQL server? Or something like sqlplus under Oracle?
Moreover how can I install the .BAK file they sent me on my MSSQL install in order to recreate the db on my workstation??
My goal is to make from time to time a (one way) replication from MSSQL server (Win2K) to MySQL (Linux, i mean no ODBC here).
Is it possible and how ?
The preferable way is to use the MSSQL's replication features, but I have another idea - a simple (php, perl - no matter) program on the linux machine which will be "cron"-ed to run at the requested time intervals.
What are your recommendings ? Thanks in advance for every kind of help.
I have been using MySQL for a long time but because of company policy changes I have started to switch from MySQL to MsSQL
OMG MsSQL is very slow with every thing it does compared to MySQL. I.e updating 300.000+) data in a table with 15 million+ records using 'update' syntax. In MySQL it was done in 4 minutes. In MsSQL it was not done in 20 minutes (and then I stoped it in anger)
I have a script that I have created to give our daily revenue. In MySQL that takes 30 sec to finish. In MsSQL it takes atleast 1.30 minutes.
I have 1,5G of memory and MsSQL uses it all. MySQL uses 200mb at most.
What am I doing wrong. Is it the memory or what can it be? I have indexed the tables in the same way. I really don't know what to do anymore.
Posted this at the tail end of another thread but that one appears to have died. Thought I'd try again since my question was a little distinct from that one anyway, but apologies if I've committed forum sacrilege.
I am having a heck of a time trying to migrate a fairly simple MySQL DB to SQL Server I am using SQL Server 2005 Standard Edition SP1.
I tried following MS' instructions in this article:
hoping that what worked for 2000 would work for 2005, since the principles seem sound. No luck. I can create the ODBC link, but SQL Management Studio, the '.NET provider for ODBC' option doesn't give me the choice to copy tables - only to write a query.
I tried making sense of the on-line help and was able to create the ODBC connection in the 'Business Intelligence Development Studio' but I have no idea what I am looking at with respect to creating control & data flow in an SSIS package. All I know is that I could do what I am trying to do in SQL Server 2000 quite easily - the MySQL database in question is quite simple (but not small). I am pretty amateurish when it comes to SQL administration, but this seems to me unnecessarily difficult.
I tried the MySQL OLE connector from sourceforge and was able to properly set up a test connection and get the 'copy tables' option, but then when I hit 'next' I get:
MYSqlProv 3.9 failed with no error message available, result code E_ABORT(0x80004004) (System.Data)
Am I missing some stupendously easy way around this, or did I torpedo this client when I promoted moving them from MySQL to MS SQL Server on account of my not being a full-time SQL Server DBA who knows how to use the Business Intelligence Development Studio?
I have a mobile application written in vb.net using MsSQL and I want to use disconnected datasets to sync up to a remote MySQL database. is this possible? Its a two way sync, i.e I download and upload info.
I'm on a team that is developing a site in PHP / MySQL. We've been asked by the client to convert the database over to MSSQL. I've never used MSSQL, but after looking at the syntax available on php.net, there really isn't all that much difference in doing basic queries. I was wondering if any of you MSSQL gurus knew of some major differences between MySQL and MSSQL that I may be overlooking.
Anything, however basic or complex, would be helpful.
Is there any way where I can add the MySQL Server as a Linked server to MS SQL server? Is there any way where I can update a table in MySQL server based because a row was updated in MS SQL server using a trigger?
Hi all! I'm trying importing a MySQL database to my MSSQL server. I've donwloaded the MySQL ODBC drivers and I can connect succesfully throught a DSN to my MySQL server. Everything works fine EXEPT my BLOB field. I'm using a BLOB field for storing a binary file.
When I choose preview while importing my bob field is empty.
Hi all.I need to set a oneway replication of some data from MSSQL (running underWindows 2000 server) to MYSQL (running under Linux).Do you have some ideas to solve the problem?Thank youLuca
Can't seem to find a similar data type in MSSQL like the one very handy ENUM type existing in e.g MySQL:
... Enum('on','off','standby') ...
It's also a convinient way to check for true/false. I'd appreciate any suggestions on possible "workarounds" or sources that might point me in the right direction.
