In PostgreSQL, theSELECT INTOstatement performs various functionalities in one go. The stated command creates a new table, copies data from the original table, and pastes it into the newly created table. The newly created table will have the same structure as the original/selected table. Using ...
TheALTER TABLEcommand in PostgreSQL is used to alter/update the existing tables. Users can easily modify the table’s structure using this command, such as adding columns, renaming columns/table, dropping columns, modifying constraints, etc. This blog post demonstrated the usage of the ALTER TABLE...
Databases are at the heart of most modern web applications, and PostgreSQL is one of the most popular relational database systems out there. One powerful feature of PostgreSQL—and SQL in general—is the CASE expression. It brings an element of conditional logic to the world of querying, allow...
In this article, we will discuss aboutPostgreSQL Create Databasestatement to create a new database in PostgreSQL database cluster. PostgreSQL server consists of multiple database which is called a database cluster. In other words, a database cluster is a collection of multiple databases that is ...
In this tutorial, you will learn how to use the PostgreSQL ROW_NUMBER function to assign a unique integer value to each row in a result set.
In this example, we are using a SimpleConnectionPool class to create a connection pool. Before creating a connection pool, let’s see the necessary arguments required to create a connection pool. username: the username that you use to work with PostgreSQL. ...
For example: @workspace What does this project do? @workspace What does the .devcontainer folder do? Having issues? Check the Troubleshooting section. 2. Create App Service and PostgreSQL In this step, you create the Azure resources. The steps used in this tutorial create a set of secure-by...
In this post, I am sharing a simple example of UPDATE JOIN statement in PostgreSQL. Many of the database developers are exploring the PostgreSQL so UPDATE a table from another table which is a very common requirement so I am sharing a simple example. Create two sample tables with data:...
Example 4: How to Use BIT_LENGTH() and CHAR_LENGTH() Functions in PostgreSQL? We can also use the BIT_LENGTH() and CHAR_LENGTH() methods to compute the string length. The BIT_LENGTH() retrieves the total bits of the given string while the CHAR_LENGTH() method retrieves the total ch...
Azure can serve as the backing data store for your application, but the validity of your application’s data rests in your hands. This is where JPA validations come in – for example, for an entityUser: Copy @EntitypublicclassUser{@Id@GeneratedValue(strategy = GenerationType.IDENTITY)privateLo...