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
Month: September 2021
PostgreSQL function card in the For loop
The function was stuck before the loop.
select * from scm_main.fn_connection_stations(1219646) Print the message “Start…” but not the message “…End”.
CREATE OR REPLACE FUNCTION
scm
In-depth analysis of NOSQL database distributed algorithms
Abstract: Although the NoSQL movement did not bring fundamentals to distributed data processing Technological changes, but still triggered overwhelming research and practice on various protocols an
Question When you create a function in PostgreSQL, “Error: Syntax error is in or near” RowType “
The following is a simple process in PL/SQL
PROCEDURE emp_get_rec (emp_rec IN OUT NOCOPY emp_content%ROWTYPE)< br /> IS
v_cnt NUMBER;
BEGIN
SELECT COUNT(*)
INTO v_cnt
FROM emp_content
W
NOSQL modeling technology for big data architects
1. Preface
In order to adapt to the requirements of big data application scenarios, emerging architectures such as Hadoop and NoSQL, which are completely different from traditional enterprise
NOSQL – How to deal with multiple to more DynamoDB
I am new to NoSql and DynamoDb, but from RDBMS..
My table is moving from MySql to DynamoDb. I have a table:
Customers (column: cid [ PK], name, contact information)
Hardware (column: hid [PK], n
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
Does NOSQL – CASSANDRA suitable for storage files?
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.
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