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Getting started

Overview

DQL architecture

A quick guide
Defining Pseudo Tables

Overview

Generating pseudo table from multizone composite table

Exporting pseudo table to SPL file

Defining pseudo table’s special fields

Converting a pseudo table into an in-memory table/table sequence
DQL

Introduction

DQL definition and basic queries

Query through table association

Semantic layer

Advanced metadata design
Join query syntax

Retrieve F field

Retrieve a field of homo-dimension table/foreign key table

Aggregation

Filter

Sort

Get topN records

Group & aggregate

Join

Filter by dimension
Obtaining Metadata Information

Table

Dimension

General field

Homo-dimension tables

Sub table

Level function

Table field information

Complete metadata of JSON format
DQL Server Deployment and Integration

Deploying DQL Server

Invoking DQL Server in Java applications

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Table

Read（762） Like（0） Label: table,

Functionality:

Obtain names of all tables in metadata.

Syntax:

list table

Example:

1

list table

Get all tables in metadata