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ExtractTableAlias

type ExtractTableAlias<DB, TE> = TE extends `${string} as ${infer TA}` ? TA extends keyof DB ? TA : never : TE extends keyof DB ? TE : never;

§Type Parameters

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TE extends `${string} as ${infer TA}` ? TA extends keyof DB ? TA : never : TE extends keyof DB ? TE : never
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