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Overview
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DQL definition and basic queries
Query through table association
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Join query syntax
Retrieve F field
Retrieve a field of homo-dimension table/foreign key table
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Join
Filter by dimension
Obtaining Metadata Information
Table
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Homo-dimension tables
Sub table
Level function
Table field information
Complete metadata of JSON format
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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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