$rawSql='SELECT supplier_code,create_time FROM (SELECT supplier_code,max(create_time) AS create_time FROM lie_sku_upload_log GROUP BY supplier_code) AS temp WHERE supplier_code = ?';
}else{
$rawSql='SELECT supplier_code,create_time FROM (SELECT supplier_code,min(create_time) AS create_time FROM lie_sku_upload_log GROUP BY supplier_code) AS temp WHERE supplier_code = ?';