20 lines
469 B
SQL
20 lines
469 B
SQL
WITH snapshot_rankings AS (
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SELECT
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id,
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url,
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ROW_NUMBER() OVER (
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PARTITION BY url
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ORDER BY
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CASE WHEN (gemtext IS NOT NULL AND gemtext != '') OR data IS NOT NULL
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THEN 0 ELSE 1 END,
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timestamp DESC
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) as rn
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FROM snapshots
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)
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DELETE FROM snapshots
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WHERE id IN (
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SELECT id
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FROM snapshot_rankings
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WHERE rn > 1
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);
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