IT Answers » MySQL Database

GROUP BY mysql

LewisT — Thu, 07 Jun 2012 08:10:15 +0000

Hi

I have started working with a mySQL databse.

I need a query that will either make use of “DISTINCT” or “GROUP BY” but that selectes the record that has the highest ‘VersionNumber’

Can anybody suggest how I would achieve this?

Thanks in advance.

Pass table name to procedure including fields

Sonyadba — Mon, 14 May 2012 05:55:09 +0000

I want to do the following with a procedure:

I have per user that has the same structure. The only difference is the table name. I need to be able to pass the table name to a procedure and retrieve data for that table. At the moment I have this:

sp_getdata(id, givendate datetime,tablename varchar(200))

BEGIN

SELECT column1, column2, column3

FROM ‘tablename’, table2

WHERE ‘tablename’.id = id

AND
‘tablename’.date = givendate;

AND ‘tablename’.uniqueid=table2.uniqueid

END;

table2 never change but tablename yes. Any idea how can I do this? thanks

SQL TAGS

Abcdefg0715415 — Fri, 11 May 2012 06:54:41 +0000

Why am failling when am using mysql to create database and am using the exactly tags?

Creating Views in MYSQL via Sysdate

Help123 — Mon, 26 Mar 2012 20:58:49 +0000

Hello Guys,
I can create simple views for MYSQL Database tables but I am unsure on how to create a view for the following requirement:

I want to create a view which restricts staff user access to a specific table between working hours of 13:00 – 14:00.

I have been told that this can be implemented via the sysdate function. Any ideas on how I would do this?
All help is well appreciated!
Thank You!

MYSQL DATABASE!!!

Shagy — Sat, 28 Jan 2012 10:09:27 +0000

Hello everyone!

please help me about transfering MYSQL DATABASE from one computer to another…..

I am a student and got to show a project on JDBC.

I am using Windows 7 os and Mysql server 5.1..

Thank you.

MYSQL database high availability

Chetanm — Tue, 04 Oct 2011 08:45:58 +0000

I have cent os based LAMP system. My question is that, what is the best way to make mysql database high availability. As per me database clustering is a good option can you please suggest me.

Security issues for mysql in a cloud environment?

MillyT — Mon, 29 Aug 2011 15:54:59 +0000

Hi everyone, in general, I’ve been asked by my manager to find out about running a mysql db on a cloud (like this one) — has anyone done this, and what do you think are the security issues that can come up when doing so? More specifically, IT has questioned me about how auditing would work on a cloud, and what issues need to be taken account with such a move. I’d be glad to hear about anyone’s experience with this issue, . Thanks, M

How to Join MySQL database box to a Windows Server 2008 DNS

Jasonjlewis — Sun, 10 Apr 2011 06:47:20 +0000

How do I add a Mysql database server to my win 2008 r2 domain. Firstly do I install the Mysql on another Win 2008 box then join to DNS. I also need to add a Apache web server which will be in the DMZ.

I need to install the following
MySql database on a seperate server from my DNS server then join that to my domain. Can anyone point me in the right direction.
Also I require an Apache web server, this will be on a seperate box also living in my DMZ. I have a little experience DNS,AD,DHCP, Addressing, Exchange.

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How to import simple spreadsheet into mysql database?

Ingram87 — Fri, 11 Feb 2011 02:49:22 +0000

I have a simple spreadsheet (only 2 columns) that I need imported into a mysql database. I can convert the spreadsheet into whatever format I need to (comma delimited), but I need the mysql commands that will import it. Does anybody know how to do this?

Upgrading for database structure

Mshafie — Tue, 25 Jan 2011 07:42:41 +0000

hello everyone

Maybe my previous question was not the correct question to ask.

I am in the middle of making an application upgrade which includes DB structure upgrade with keeping Data “data loss is not accepted here”.

I have a complex DB structure in my application which depends “in some cases heavily depending” on database specific features.

I use SQL Server “2005/2008″ , Oracle “10g” mainly, but MySql is also used.

current modifications include:

* new IDs created and modified, some of these IDs have foreign keys ,related to specific Field names that are new created …

* modifications of Field types, lengths , charsets …

here are notes about my case:

* some tables are partitioned. and some of them include LOB data.

* some tables are used as archived data “almost 100M records in some tables”

* data has to be moved as smooth as possible with NO LOSS.

My Questions are:

- Is there a best practice scenario to do this upgrade?

- as mentioned before , my application is depending on a lot of database specific features , how can migration plan be optimized to work with major 2 DB engines “SQLSERVER / Oracle”?

- Is upgrading better or creating new DB Schema and applying new structure modified? then migrate this data? in such case how can i handle sequences , … to make sure no errors occur in runtime?

thanks in advance

sorry for the stray ,,,

have a good day all.