I am developing a PHP platform that will use images, documents and any file format extensively, which will be in my mind, so I want to know if Cassandra is a good one for my needs The choice.
Author: Simo
PostgreSQL Update Self-Grocence
— Updating the automation sequence often requires Used
select setval(‘dm_table_column_id_seq’,(select max(id) from dm_table_column));
select setval(‘dm_table_id_seq’,(select max(id) from d
PostgreSQL – How to use node-postgres for bulk insertion
I am using express and node-pg to import excel files into the postgres database
Currently I loop through the excel rows and perform inserts for each row, but I I think this is not the right w
PowerDesigner can’t do database conversion
You need to select the database before creating a table with the powerDesinger tool. After determining the database type and version, you can’t Do database conversion again, unless you re-create a
PowerDesigner generates an HTML document
Using PowerDesinger to produce HTML documents, it is convenient to query the detailed information of the data table
The steps are as follows:
< p>Using PowerDesinger to produce HTML doc
PowerDesigner does not have a Database menu
powerdesigner will only show the database menu when the physical model PDM is selected. You need to double-click pdm to show the database
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/