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mysqld Is a daemon server program, also known as MySQL server. It is used to manage the MySQL data directory with tables and databases. This tutorial guides you through the various methods you can use to start, stop, or restart a MySQL serv...

This tutorial discusses how to check for duplicates in a MySQL table and retrieve the number of duplicates using the SELECT DISTINCT and statements, respectively. SELECT COUNT SELECT DISTINCT Check for duplicates in a MySQL table using The...

Traditional SQL INSERT statements do not perform input validation of their parameters/values ​​against existing database tables, which sometimes results in errors when duplicate keys are found during the insert process. This is handled...

This tutorial aims to understand unsigned in MySQL. unsigned Using keywords in MySQL Businesses and organizations have to assign data type as unsigned for certain columns. However, it is important to understand when and where to use this da...

Summary: in this tutorial, we will learn how to shuffle or sort the values ​​or records of a table in MySQL. Most businesses and organizations that use MySQL for data analysis or visualization need to sort different table values ​​o...

In this tutorial article, we will explain how to declare variables in SQL code for MySQL database. In SQL scripts, you can use variables to store values ​​and use them in place of literals during the execution of a series of commands. U...

Getting the distinct values ​​in a field is an important query. This article discusses how to get the distinct count of values ​​in a field. Get distinct count of field values ​​in PostgreSQL Consider a quiz_score table that rec...

This tutorial discusses how to convert an integer to a string in PostgreSQL. Convert integer to string in PostgreSQL Consider a quiz_score table that records the score of each participant in a quiz game. The scores are stored in this table...

This article discusses how to escape single quotes in PostgreSQL queries. Escaping single quotes in PostgreSQL Consider a comment table that records user comments. The table has 5 fields: id , userid , postid , comments , commentdate , as s...

JSONB is a decomposed binary format for storing JSON data. If you follow Google Trends or do some research, you'll see that JSON is becoming increasingly popular in the development world. Nowadays, NoSQL can store JSON data by default. It i...

This article will discuss how to find the disk size of a PostgreSQL table and its indexes. Find the disk size of PostgreSQL tables and databases using PSQL You can use \l+ to view the database size and use to \d+ show table size. But before...

When developing an application, developers must understand the different ways they can use to interact with the database. This knowledge will help improve development efficiency because they will know the best way to solve a specific proble...

When we try to connect to the database, Postgres uses SSL to verify the security of the connection. It is disabled by default in HTTP, but in HTTPS, we need the SSL mode of the connection to perform any operation in the Postgres database. I...

This short article shows how to restart PostgreSQL in Ubuntu. Restart PostgreSQL Server in Ubuntu You can restart Postgres server in Ubuntu using the following command. Order: sudo service postgres restart Sometimes the above command does n...

When we develop applications, we end up hosting them with the desired cloud providers under specific monthly or annual subscriptions. Depending on your plan, these subscriptions provide us with different services like data stored in databas...