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Syntax:
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DQL JOIN Syntax:
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<code>
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[[LEFT | INNER] JOIN <component_reference1>] [ON | WITH] <join_condition1> [MAP] <map_condition1>,
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[[LEFT | INNER] JOIN <component_reference2>] [ON | WITH] <join_condition2> [MAP] <map_condition2>,
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[[LEFT | INNER] JOIN <component_reference1>] [ON | WITH] <join_condition1> [INDEXBY] <map_condition1>,
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[[LEFT | INNER] JOIN <component_reference2>] [ON | WITH] <join_condition2> [INDEXBY] <map_condition2>,
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...
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[[LEFT | INNER] JOIN <component_referenceN>] [ON | WITH] <join_conditionN> [MAP] <map_conditionN>
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[[LEFT | INNER] JOIN <component_referenceN>] [ON | WITH] <join_conditionN> [INDEXBY] <map_conditionN>
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</code>
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DQL supports two kinds of joins INNER JOINs and LEFT JOINs. For each joined component, you can optionally specify an alias.
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