ClickHouse是俄罗斯的Yandex于2016年开源的列式存储数据库(DBMS),使用C++语言编写,主要用于在线分析处理查询(OLAP),能够使用SQL查询实时生成分析数据报告。 OLAP(On-Line Analytical Processing)翻译为联机分析处理,专注于分析处理,从对数据库操作来看,OLAP是对数据的查询; OLTP(on-line transaction processing)翻译为联机...
More information on the DBMS_XPLAN package can be found in the Oracle® Database PL/SQL Packages and Types Reference guide. 6 THE ORACLE OPTIMIZER EXPLAIN THE EXPLAIN PLAN What is Cost? The Oracle Optimizer is a cost-based optimizer. The execution plan selected for a SQL statement is just...
ClickHouse是一个用于"联机分析"(OLAP)的列式数据库管理系统(DBMS:Database Managerment System),简称CH ,主要用于 “在线分析处理查询”(OLAP:Online Analytical Processing),能够使用SQL查询"实时生成分析"数据报告 . ClickHouse clickhouse数据库 aes加密 大数据 数据库 数据 服务器 clickhouse 导入mysql 连不上 clic...
Data Information Knowledge Data Information Knowledge in IS Answer and Explanation: Value of Knowledge in IS: In an Information system, the components Data, Information, and knowledge are connected with each other. Data represents... Learn more about this topic: ...
The EXPLAIN PLAN statement allows you to submit a SQL statement to Oracle and have the database prepare the execution plan for the statement without actually executing it. The execution plan is made available to you in the form of rows inserted into a special table called a plan table. You...
A Study on NoSQL Database Related to Large of Amount of Data in Distributed Environment. Digital apple is growing actual fast and become added circuitous in the terabyte to petabyte, structured and un-structured and hybrid, top acceleration in ... MK Singh,M Kemal,F Ahmed 被引量: 0发表:...
If you do not specify INTO table_name, the execution plan is stored in the PLAN_TABLE table by default. SET statement_id The statement ID of the explained SQL statement, which can be used to query the execution plan of the statement later. If you do not specify SET statement_id, an ...
DISTSQLReturn the statement plan and performance statistics as well as a generated link to a graphical distributed SQL physical statement plan tree. SeeDISTSQLoption. DEBUGGenerate a ZIP file containing files with detailed information about the query and the database objects referenced in the query....
More information on the DBMS_XPLAN package can be found in the Oracle® Database PL/SQL Packages and Types Reference guide. 6 THE ORACLE OPTIMIZER EXPLAIN THE EXPLAIN PLAN What is Cost? The Oracle Optimizer is a cost-based optimizer. The execution plan selected for a SQL statement is just...
More information on the DBMS_XPLAN package can be found in the Oracle® Database PL/SQL Packages and Types Reference guide. 6 THE ORACLE OPTIMIZER EXPLAIN THE EXPLAIN PLAN What is Cost? The Oracle Optimizer is a cost-based optimizer. The execution plan selected for a SQL statement is ...