Recently, one of my requirements have been to modify multiple dbs at one go and i have been using SOURCE command to execute the file (.sql file)
However, i wanted to know if there is an online way to do it because that way i can use nohup to let it run even if i log out or any network issues come along and my session ends. By online mode, i meant not having to go to mysql command line ( mysql> )
Wanted to know if this is possible at all? Please note that SQL file is targeted to modify multiple DBs at one go.
I don't know about an "online mode", but if you want to let your mysql run even if you log out if a network issue come along, I suggest you use GNU screen. If your session ends, anything runned inside screen will continue to run in the background, and you'll be able to reattach your session with screen -r when you'll signin again.
Related
I'm learning SQL / MySQL using WAMPSERVER and the MySql extension for vsCode, so that I can write, comment and keep the code in the vsCode editor, instead of sending volatile queries with the command line.
This morning I created a database by right-clicking a database / New Query:
After creating it this way, I was able to create code that I run without having to write USE DBaseName before the selected lines, as in the selected three lines you can see below:
Yet, after restarting my laptop at home, the same code will not run. It returns the usual
undefined
Error: ER_NO_DB_ERROR: No database selected
unless I write the USE statement, as in the last group (4 lines) of code. So I have to write that every time I want to try a query...
Why did it work this morning and not now? How can one run queries without having to constantly write USE DBaseName?
(links to explanations to further understand the underlying mechanism are also very welcome...)
EDIT: posting image of server in vsCode to answer comment:
I'm using a local server (pic below) which hasn't changed since this morning...
I apologise in advance for I know that this question has been asked several times already, but being a complete beginner at wordpress coding and database handling, I am still not sure about what those answers really meant.
So having just coded a website and converted it into WordPress, I now find myself having to change all of the localhost strings to the accurate ones, but with hundreds to go through, I just wanted to know if any of you were able to recommend a program or technique within PHPMyAdmin (that I may not be aware of) to avoid having to change them one at a time.
Thank you all in advance for your time and attention.
First, let me start by saying this is very dangerous, especially for an absolute beginner such as yourself. Please use this with extreme caution as you can potentially bring the entire site down by replacing values in your database with the wrong data.
With that said, there is a script specifically designed for doing search and replace on the WordPress MySQL database. http://interconnectit.com/products/search-and-replace-for-wordpress-databases/
Here's the direct download link: https://github.com/interconnectit/Search-Replace-DB/archive/master.zip
You will extract the folder from the donwloaded zip, then upload the folder to the root of your WordPress install. Once its uploaded just reference the folder in the browser. I always rename the folder to sr (shorthand for search and replace) so its easier to write out the full URL. So as an example, once its in the root of the WordPress install you'd access it like www.example.com/sr/.
After you access the script in the browser, you'll have a GUI with two boxes at the top. The first you'll enter the string you're searching for, and the replace string goes in the second box. Your MySQL details/login should already be populated. After entering your S&R terms scroll down and click "Update Details", then do the "Dry Run" option first. It'll run through the database and show you the values that will be changed. If you are satisfied with the changes, click "Live Run".
Depending on the database size it'll take just a short time to complete. This is the easiest way to S&R the WordPress database.
Important: for security reasons you'll want to delete this folder from your server after you have finished using it. You don't want a database S&R utility just lingering around for no reason.
Another possible option if you're familiar with WP-CLI is to use the wp search-replace command: https://developer.wordpress.org/cli/commands/search-replace/ This would be done through Terminal or another command line utility.
In phpMyAdmin open your table, choose Search > Find and replace. Then specify in which column you want to find and replace, and the original and replacement texts.
Without any doubt I would use http://interconnectit.com/products/search-and-replace-for-wordpress-databases/
This tool is especially designed for the situation you describe.
You upload the code to your server and then enter the "find" and "replace"
You can then do a dry run and the system will show you all the replaces that will be made across every single table in your Wordpress database.
Once you're happy then you can do a live run and the changes are made.
I have used this on probably one hundred Wordpress sites and it works a charm.
I'm working on a project right now that required me to use a CMS that makes multiple changes to a database, I'll need those changes later in order to create a post install configuration file to reuse those changes. I know that there are lots of Windows based programs that will show you MySQL Diffs, but what about Linux? I would like the ability to keep an appending log of my changes so I know what exactly is going on under the hood.
The ideal scenario would be that I can capture a post and current state, compare them, and aggregate the output. Does anyone know a way to do this?
If these are the only changes made to your database then one way to do this is to enable the binary log, and use that as your change log. You can convert it to a SQL script using the mysqlbinlog tool.
I just deleted two days of work because I though I had a backup, but I didn't. Now I need to create the database from scratch and I just wonder, isn't there a built-in backup system, just in case of someone being stupid? It's running on localhost and I haven't exported it out before.
If you've had binary logging enabled, then you might be lucky enough to use it to restore your database.
Note: If you ask me 'how do I know if I had binary logging enabled?' this pretty much means you didn't, because it's disabled by default.
There are several options. They're covered in detail at http://dev.mysql.com/doc/refman/5.1/en/backup-and-recovery.html
If you are developing some kind of app, I'd also recommend to store your DB structure in your version control system together with your source code.
No.
Computers will do anything you command them to - but it is your responsibility to know what you're doing.
In this way, "if you wanted backups, you would have made them" - power-user tools (such as databases) are optimized for performance, not for being user-proof.
Install the MySQL Workbench:-
On left side panel (i.e. under the Administration section), you will find the option to "Data Import/Restore".
On click, you will land on the Data Import. Select the option "Import from Dump Project Folder" and then select the file based on TimeStamp of that duration when the database was deleted.
Click on "Load Folder Content"
Select database object to import, check whether the deleted database is visible or not.
If visible then select all the tables and click on start import button.
If not visible then start with step 2 again and one by one select all the dump files.
At least I was able to recover all my database which accidentally got deleted during the database restore (i.e. initialization process).
This has saved my weeks of effort.
For some security issues I'm in an envorinment where third party apps can't access my DB. For this reason I should have some service/tool/script (dunno what yet... i'm open to the best option, still reading to see what I'm gonna do...)
which enables me to generate on a regular basis(daily, weekly, monthly) some csv file with all new/modified records for a certain application.
I should be able to automate this process and also export at any time a new file.
So it should keep track for each application which records he still needs.
Each application will need some data in some other format (csv/xls/sql), also some fields will be needed for some application and some aren't... It should be fairly flexible...
What is the best option for me? Creating some custom tables for each application? Based on that extracting modified data?
I think you best thing here, assuming you have access to the server to let you set this up is to make a small command line program that can do the relativley simple task you need. Languages like pearl are good for this sort of thing I do believe.
once you have that 'tool' made you can schedule it through the OS of the server to run ever set amount of time. Either schedule task for a windows server or a cronjob for a linux server.
You can also (with out having to set up the scheduled task if you don't / can't want to) enable this small command line application to be called via 'CGI' this is a special way of letting applications on the server be executed at will by a web user. If you do enable this though, I suggest you add some sort of locking system so that it can only be run every so often and to stop it being run five times at once.
EDIT
You might also want to just look into database replication or adding read only users. This saves a hole lot of arseing around. Try to find a solution that dose not split or duplicate data. You can set up users to only be able to access certain parts of the database system in certain ways, such as SELECT data