Then, we have written the “WHERE NOT EXISTS” statement that will check whether the specified database exists on the PostgreSQL server or not. ![]() After that, we have mentioned the name of our new database to be created. The “SELECT” statement in this query is followed by the “CREATE DATABASE statement”. With this query, we will create a database named “myNewDB” that was not already present on our PostgreSQL server on our Windows 10 system. # SELECT ‘CREATE DATABASE myNewDB’ WHERE NOT EXISTS (SELECT FROM pg_database WHERE datname = ‘myNewDB’)\gexec To display the names of all the existing PostgreSQL databases, you need to execute the following PostgreSQL query in your psql console: Therefore, we will first try to find out the names of all of our existing PostgreSQL databases to know if such a database already exists on our server or not. The database that we want to be created in this particular case is “myNewDB”. We all know that we only wish to create a specific database in PostgreSQL if it already exists on our server. Step # 1: Viewing the Existing PostgreSQL Databases in Windows 10: Note: Do not forget to log into your PostgreSQL server before following these steps. To understand this variation, you will have to follow through the steps explained below: For this workaround, you will need to execute a slightly different variation of this notation in the form of a PostgreSQL query in Windows 10. Since the “Create Database if not Exists” notation cannot be used as it is within the PostgreSQL environment, therefore, we decided to share with you a workaround with which you can achieve the very same functionality. If not, then which Workaround can we use to achieve the Same Goal? To explore more about these workarounds, you will have to continue reading this article. Nevertheless, there are still some ways that can allow you to achieve the very same functionality as you can achieve with this particular notation. PostgreSQL does not support this notation, or in other words, you can say that we cannot use this notation directly in PostgreSQL in Windows 10. However, let’s specifically talk about PostgreSQL. With the help of this notation, you can check if a specified database exists on your database server or not, and if it does not exist, then this notation will simply create that database on your server. The “Create Database if not Exists” notation is supported by some of the programming languages. Can we use the “Create Database if not Exists” Notation in PostgreSQL in Windows 10? After that, we will share with you a PostgreSQL-supported alternative for this notation. This guide aims to introduce you to the usage of this notation with a brief discussion on whether PostgreSQL supports this notation or not. In that case, the “Create Database if not Exists” notation comes into play. Moreover, there are some situations in which we want a database to be created once we run a query if it does not already exist on our database server. What we mean to say is that we need a mechanism to check if a database exists on our PostgreSQL server or not. However, at times, we want to run a query on an existing database, but for that, the existence of such a database is mandatory. After creating a database of your choice, you can create multiple tables within it to store your data, and then you can perform different calculations on that data. You can create as many databases of your choice on your PostgreSQL server as you want. Whenever we talk about PostgreSQL, we always think about databases because it is a database management system.
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