I’ve been usingPostgreSQLinstead ofMySQLfor a while now. When I first migrated, one problem I had was related to how string columns work.In PostgreSQL they’recase-sensitive. To demonstrate how PostgreSQL works let’s create a table with a unique index. -- create the tableCREATETABLEusers(...
Conditional expressions are one of the most fundamental elements of any programming paradigm. Common conditional expressions includeif-elseblocks andswitchcases. You can formulate conditional expressions in PostgreSQL usingWHEN-THENcase which is very similar toif-elseblocks. In this tutorial, you will le...
First install the PostgreSQL server: sudoapt-getinstall-ypostgresql postgresql-client libpq-dev The next step is to create a user, so sign in to PostgreSQL: sudo-upostgres psql-dtemplate1 Then create a user (in our caserunner) which is used by your application. Change$passwordin the command...
you should use the PostgreSQL CAST option. Maybe you want to achieve a given agenda, but the current data type in your table doesn’t support it. Using the CAST feature allows you to convert the data types easily.
PostgreSQLCopyHelper Custom Type Maps One can always define a custom map function for any property to anyNpgsqltype. For example: .Map("geo",x=>x.geo,NpgsqlDbType.Point) Mapping Composite Types Imagine you have a composite type calledperson_typein a schema of your database: ...
With an Aurora PostgreSQL–based global database, you can manage the recovery point objective (RPO) for your Aurora global database by using the rds.global_db_rpo parameter. RPO represents the maximum amount of data that can be lost in the event of an outage. ...
It also serves as a solid foundation for your more complex NFT analysis projects in the future. The NFT Starter Kit and accompanying tutorial will help you use PostgreSQL and TimescaleDB to unearth insights from NFT data. It includes: A database schema to efficiently store and query data. ...
Use your existing PostgreSQL database as a vector database by generating embeddings from text stored in the database. Translation SQL query SELECT pgml.transform( 'translation_en_to_fr', inputs => ARRAY[ 'Welcome to the future!', 'Where have you been all this time?' ] ) AS french; ...
In this post, initially, we will discuss the creation of the pg_partman extension following partitioning for newly created tables. First, we will need to install the OS with the necessary control files for the appropriate PostgreSQL version for installing pg_partman on the database. Installation ...
we'll be writing some queries against theSakila Sample DatabaseusingNavicat Premium. It's a powerful database development and administration tool that can simultaneously connect to most popular databases, including MySQL, MariaDB, MongoDB, SQL Server, Oracle, PostgreSQL, and SQLite databases. It's...