- 🔥【New Feature】Import preview, field mapping and basic configuration: CSV, XLS, XLSX, JSON and SQL imports can be previewed before they run, the mapping between source and target fields can be adjusted, individual fields can be skipped, and unmapped fields can take a default value or `NULL`. CSV supports the file encoding, delimiter, quote and escape characters, header and data row ranges, null handling and date/number formats; Excel/XLS select the worksheet, header row, first and last data row and the column range, treat empty fields as NULL, and set the date, time and decimal formats for text cells; JSON selects the encoding, the data structure (array of objects, single object, JSON Lines) and the data node path, and can skip individual nested fields; SQL supports a file encoding (detected automatically or given explicitly, such as GBK). The preview and the import run use the same options, so the mapping shows what is imported.
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