powerdesigner will only show the database menu when the physical model PDM is selected. You need to double-click pdm to show the database
Category: Database
The database is a warehouse that organizes, stores and manages data according to the data structure. It was created more than 60 years ago. With the development of information technology and the market, especially after the 1990s, data management is no longer just It is to store and manage data, and transform it into various data management methods required by users. There are many types of databases, from the simplest tables that store various data to large-scale database systems that can store massive amounts of data. They have been widely used in all aspects.
Dynamic data perspective query using PostgreSQL 9.3
I have a table called Product:
create table product (
ProductNumber varchar(10) ,
ProductName varchar(10),
SalesQuantity int,
Salescountry varchar(10)
); Sample value:
insert into p
PostgreSQL – How to specify different column types according to the database type of Haskell GROUNDHOG?
Using the Groundhog library in Haskell, I want to implement a column type that uses “uuid” when the backend is Postgresql, otherwise just use “varchar” for any other backends. Although this should
PostgreSQL – Docker Postgres is not running the init file in docker-entrypoint-initdb.d
Based on Docker’s Postgres documentation, I can create any *.sql file in /docker-entrypoint-initdb.d and let it run automatically.
I have init.sql contains CREATE DATABASE ronda;
In my
NOSQL – Cassandra file structure – How is the file used?
When trying to use Cassandra, I found that Cassandra will write the following files:
/…/cassandra/ commitlog/CommitLog-.log
/…/cassandra/data/Keyspace1/Standard1-1-Data.db
/…/cassandra/
Liu Wei: TIDB tool chain and ecology
This article is the content of “TiDB Tool Chain and Ecology” shared by Liu Yin, the head of PingCAP’s commercial product team, at TiDB DevCon2018 at the beginning of this year. It introduces the pe
PostgreSQL Install and create users and create a database
One. Installation You can refer to the postgresql official website installation tutorial: https://www.postgresql.org/download/linux/redhat/
Centos 6 install postgresql 10
Add RPM:
PostgreSQL – PGADMIN 4 (or DB VisualiSer) Entity Relationship
How to use pgAdmin v4 or DB Visualizer or any other open source tools to make entity relationship diagrams?
PG Administrator
pgadmin III has many interpreters, but they suggest that there sho
PostgreSQL-9.1 – PgAdmin III does not respond when trying to recover the database
I am trying to restore the database (via a backup file), I am using PgAdmin III (Postgresql 9.1).
After selecting the backup file, a window indicates that pg_restore.exe is running, and then PgAdm
NOSQL – How to build a real world relationship in a chart database (such as NEO4J)?
I have a general question about modeling in a graph database, and I can’t seem to surround my head.
How do you model this type of relationship: “Newton invented calculus”?
In simple gra