We are evaluating the upcoming projects of NoSQL. I tend to think about things in an RDBMS way and have difficulties in conceptualization and lack of standardization.
I know that copying data
Tag: data
NOSQL – Use the relational database to carry out countless data – best practice
After reading the article written by Bret Taylor (Co-founder of FriendFeed, current CTO of Facebook) How FriendFeed uses MySQL to store schema-less data After the shocking article, I began to doubt
PostgreSQL big data query Adex sumcore and non-Caocau
1. Create a test table
CREATE TABLE big_data
(
id character varying(50) NOT NULL,
name character varying(50),
datetime timestamp with time zone,
CONSTRAINT big_data_pkey PRIMARY KEY (id)
PostgreSQL – Postgres – Calculation of cumulative data
I collect data from some API sources through Python and add it to 2 tables in Postgres.
Then, I use this data To generate reports, join and group/filter data. I add thousands of rows every da
PostgreSQL – the inconsistency between the month, Japanese and seconds of the interval data type
I understand why postgresql uses month, day and second fields to represent the sql interval data type. If it involves daylight saving time adjustments, the length of a month is not always the same.
RDBMS – Relationship between reasonable export and non-relational data
For various reasons, we have different products that rely on relational databases, which are basically the transactional nature of operations (atomicity, consistency, etc.). This will not change so
Add a missing monthly date in the time series data in PostgreSQL
I have monthly time series data in the table, where the date is the last day of the month. Some dates are missing in the data. I want to insert these dates and add zero values for other attribute
Bluetooth-Lowenergy – Ibeacon can have data load
I know that the definition of iBeacon is the fixed specification of the advertising packet it is transmitting:
> 9-byte iBeacon prefix
> 16-byte UUID
> 2 bytes primary
> 2 bytes secondary
> 1
Design and Implementation of Data Structure of EOCS Cross Chain Contract Zone
Core data structure analysis 1
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< span class="line">4
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struct {
block_timestamp_type timestamp;
account_name producer;
static uint32_t num_from_id(const block_id_type& id);
}
.NET – A strange thing when using the inline initialization anti-sequence
When serializing a type with a boolean member initialized to true inline – I always get the value true when the object is deserialized (obviously, the problem is in the serialization The actual val