The original text is from: http://www.voidcn.com/article/p-vudrzoeb-oy.html
Physical Data Model (PDM): After the logical structure of the database is designed, its physical design needs to be
Tag: data
Monotouch’s mono.data.sqlite: How to get the value of the auto increment field after inserting a line?
Well, this may be very basic stuff, but it took me a long time to figure it out. I think there are more .NET programmers like me, Monotouch and SQLite Newbies don’t know this.
I use Ado.NET (
How many data have each node in the NOSQL – Cassandra cluster?
When do the boundaries of SSTables compression (primary and secondary) become invalid?
If I have the main compression of 500G SSTables and my final SSTable will exceed 1TB-is this effective f
PostgreSQL – AWS Redshift loading data from S3
So I am trying to load data from an S3 bucket into my Redshift database. I have a table’Example’ with the field’timestamp’ in the format of’YY-MM’ -DD HH: MM: SS’.
Use copy query to load da
Nosql – Cassandra Time Series Data
We are considering using Cassandra to store information streams from various sources.
One of the problems we face is the best way to query between two dates.
For example, we will need t
For structured data on a machine, NOSQL does the actual advantage for RDBMS?
So I have been trying to find out whether NoSQL really brings a lot of value beyond automatic sharding, and processed UNSTRUCTURED data.
Assuming I can install my STRUCTURED data on a single
PostgreSQL – Returning data from the update view does not work?
I have two simple tables of person and address, inserted through the updatable view person_details.
Relations and triggers
CREATE TABLE address (
id serial PRIMARY KEY,
street varchar
PostgreSQL copies the data into the table
I use the copy command in Postgresql, I have a line of data in a text file, it is the separator, I want to copy it to the db table. I received an error saying:
Error: Invalid byte sequence encodin
What type of NOSQL database is best suited to store hierarchical data?
What type of NoSQL database is best for storing hierarchical data?
For example, I want to store a forum post with a tree structure:
original post
+ re: original post< br /> + re: origi
PowerDesigner collaboration with SQL Server () data model and database of database
Data model conversion into database Generate database script according to DB design, “Database”-“Generate Database…”;
< /span>
Set the script storage path and name, select “Direct generati