postgres nextval primary key

1. Prepare Create a base table first: CREATE TABLE mytb1 (ID serial,name character varying,age integer);To create an index on the name field: Create INDEX Mytb1_name_index on MYTB1 (name); To view the MYTB1 table structure: postgres=# \d mytb1;

In PostgreSQL, the WITH clause provides a way to write the auxiliary reports and queries used in a large query. It helps break down complex and large queries in a simple and easy-to-read form.1. Build a table[SQL]View PlainCopy postgres=#

I have a lazy idea. How should this good idea begin? Well, this is an appropriate little madness: Why not build our own MongoDB version directly on the basis of postgres? It sounds far-fetched, but it's simple and real. When the NoSQL movement was

PureftpdIt is an open source code software that is used on multiple types of Unix and complies with the GPL protocol. The following describes how he and PostgreSQL are used in combination. First, we should know what PostgreSQL is? PostgreSQL is an

Tutorial on creating a MongoDB copy based on PostgreSQL, postgresqlmongodb I have an idea of laziness. How can I start with this idea? Well, this is an appropriate little crazy: Why don't we build our own MongoDB version on the basis of ipvs? It

E-commerce This paper demonstrates the application of PHP and Postgressql in e-commerce through a simple Web application. Not long ago, if a serious web application was to be structured, it meant buying expensive cold Fusion licenses and a

1.createdb database nameGenerate Database2.DROPDB database nameDeleting a database3.CREATE User NameCreate user4.drop User NameDelete User5.SELECT usename from Pg_user;View System User Information\du7.SELECT version ();View version Information8.psql

ObjectiveWhen data is partitioned, it is typical for a sub-database to have a global ID generated problem. Simply generating a global ID is not a challenge, but the generated ID usually satisfies some of the requirements of the Shard:There can be no

PostgreSQL e-commerce This paper demonstrates the application of PHP and Postgressql in e-commerce through a simple Web application. Not long ago, if you were to architect a serious web application, it would mean buying a costly cold Fusion

  Hasura graphql-engine v1.0.0-alpha26 has been released, and there are many new changes. The docker environment is tested and the PostgreSQL database uses citus. Citus is a convenient PostgreSQL database extension solution. Environment