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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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This chapter will explain the definition of DQL and how to perform queries using DQL.
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