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table-theme-styling

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动态统计Excel总行数，当数据量过大（≥10000行）时自动转换为Parquet格式加速读取，并对指定目标列进行条件筛选、分类汇总与结果导出，适用于超大体积Excel文件的快速读取与统计分析。

When to use

• Dynamic Excel row counting
• Parquet conversion for large files
• Conditional filtering of target columns
• Grouped aggregation with percentages
• Exporting summary results

When not to use

• Reading or counting small files without Parquet optimization

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