How to Connect and Update WordPress Database [Beginner’s Guide]

WordPress is a common platform for aspiring writers. It has millions of such prolific users, and the numbers are only going high. However, sometimes, there arises a need to connect to the database of WordPress. Occasional glitches are sudden and common. Many such functions are effective in establishing communication with the database, but they may not be that convenient. If you were looking for an easy way out, you have landed on the right page. This article will help you in interacting with the database in the most convenient as well as effective manner.

How to Connect and Update WordPress Database

Say Hi to $wpdb

You can now interact with the database with $wpdb class form. The functionality of $wpdb is based on the ezSQL class developed by Justin Vincent. ezSQL is a class of PHP database, which has an open source. At present is the backbone of multiple websites, including the most popular WordPress. Using this class, you can directly and securely connect to the database without involving further complication. This function gives you the utility to directly address your concern, without opening any additional database connection. Also, you don’t have to alter the set result after it has been answered. All in all, it is without any twisted and lengthy steps. All the facility is just because of one simple fact; the $wpdb is inbuilt in WordPress.

How to start $wpdb?

Retrieving data from WordPress will no more seem difficult after you learn the process. This section of the article will explicitly focus on that part. Apart from the query mentioned above, you may confront situations like how to update or remove data in the database, etc. You need to be aware of the techniques and free yourself from the so-called constraints that you come across with codes such as get_post (), wp_list_categories (), etc. However, if you use this method, you would only get the information that you want, and nothing extra. Sounds relieving? Of course, it has to be so. More such advantages are waiting to be explored. And, do not worry; everything will be discussed here in details.

Before you start, you must brush your knowledge of any Structured Query Language, preferably MySQL. Following the MySQL, the operation becomes much easy as that involves only a few functions.

Take a look at this example

To understand the working of this class, analyze this example. Here you should inquire your database for the IDs and titles of the four latest posts, demanded by comment count. This is how it goes.

WP-Database

The above query is simply a SQL one with some elements of PHP. The $wpdb class has a special method. In case, you have forgotten, a ‘method’ is the specific name for those functions that are used inside any class. The method that is part of the above example is get_results(), which won't just get the outcomes yet will place them conveniently. You may have seen that rather than utilizing wp_posts the $wpdb->posts are used here. This will act as an aid to get to the core of WordPress tables.

Show the $result!

Following the $wpdb, things become easier. This is how the $results object will be displayed.

Array

WP-Database

WP-Database

How to retrieve results?

Now, that you know the advantages of $wpdb class, it is going to be much easier to retrieve data from the WordPress database. To your surprise and happiness, you have four helper functions that you can use to structure your data. Hence, next time when you have to extract any information from the database, you have four functions to choose from.

1. GET_RESULTS ()
2. GET_ROW
3. GET_COL
4. GET_VAR

Let’s take a closer look at each one of them.

GET_RESULTS ()

This function has already been discussed in the previous example discussed above. It is the right one when you are working with two-dimensional information. Two-dimensional data usually contains a number of rows and columns. It alters the information to that of an array. This array has separate items for each line.

GET_ROW

There might be occasions when you just have to discover a specific row; then this is the helper function that you should use. Get_row() maneuvers the information into a one-dimensional item. Well, that undoubtedly makes thing much easy.

GET_COL

This helper function is equivalent to Get_Row(). However, as opposed to snatching an individual row of results, it gets an individual column. This is useful in the event that you might want to recover the IDs of just the best ten most remarked posts. Also, similar to the command of get_row(), it stores the outcomes in a one-dimensional item.

GET_VAR

Much of the time, you may require just a single value from the WordPress database. For instance, you may require the email address of one of your clients. Therefore, in this situation, you can utilize get_VAR to recover it as a basic value. The value's information type will be equivalent to its sort in the database. In other words, it means that the whole numbers, strings, etc. will remain unchanged.

How to Update the Database of WordPress?

There might arise connection issues while you try to interact with the database. Sometimes this may be a result of an outdated version. In such situations, you have to update the database of your WordPress. To do so, you just have to follow four steps. Here is what you have to do.

1. Go to the Control Panel of one.com and select File Manager.
2. Find out the wp-config.php file and run it in the editor.
3. Your login credentials are there around line twenty in that file.
4. Lastly, replace the option of update_here with your own login details.

The last step will lead you to the place where you can view the details of your connections. You are just one step away from the update. Press Save which is present at the top left corner. And, you are done.

Hopefully, you can avail some help from this article. In case, you need more information, visit RemoteDBA. You can share all your queries there and sort out the confusions you have altogether. For more such write-ups stay tuned. Good luck and may you successfully be able to interact with a database of WordPress.

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