説明: QuestDB is the fastest open source time series database designed from the ground up to offer breakthrough performance for time series data applications with fast event ingestion, real-time queries and a tiny footprint.
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name: description content: QuestDB is the fastest open source time series database designed from the ground up to offer breakthrough performance for time series data applications with fast event ingestion, real-time queries and a tiny footprint.
property: og:title content: The Fastest Time-Series Database | QuestDB
property: og:description content: QuestDB is the fastest open source time series database designed from the ground up to offer breakthrough performance for time series data applications with fast event ingestion, real-time queries and a tiny footprint.
property: og:image:alt content: The Fastest Time-Series Database
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name: twitter:title content: The Fastest Time-Series Database | QuestDB
name: twitter:description content: QuestDB is the fastest open source time series database designed from the ground up to offer breakthrough performance for time series data applications with fast event ingestion, real-time queries and a tiny footprint.
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4
/glossary/event-time...
Event time refers to the moment when a data point was actually created or when an event occurred, as opposed to when it was processed or received by a system.
5
/docs/query/datatype...
QuestDB supports N-dimensional arrays , modeled after NumPy's NDArray type. Arrays are useful for storing vectors, matrices, and higher-dimensional data directly ...
6
/glossary/fill-proba...
Fill probability is a statistical measure that estimates the likelihood of an order being executed at a specified price level in financial markets.
7
/glossary/read-after...
Read-after-write consistency , also known as read-your-writes consistency, is a database guarantee that ensures a client can immediately read the data it has ...
9
/docs/troubleshootin...
The following document contains a partial list of Operating System (OS) error codes that can be reported when running QuestDB and brief descriptions for them.
17
/docs/concept/ttl/
You can configure a time-to-live (TTL) for the table data . Both the CREATE TABLE and ALTER TABLE commands support the TTL clause.
18
/docs/reference/sql/...
DECLARE specifies a series of variable bindings used throughout your query. This syntax is supported within SELECT queries.
21
/glossary/financial-...
Financial risk modeling is the quantitative process of analyzing and measuring potential losses in financial positions or portfolios .
28
/docs/reference/sql/...
CREATE TABLE reference . To create a new table in the database, the CREATE TABLE keywords followed by column definitions are used.
29
/docs/reference/api/...
QuestDB supports the Postgres Wire Protocol (PGWire ) for data-in. For querying and data-out, QuestDB is compatible with PostgreSQL protocol.