First off the column definitions can be seen in the table creation scripts as something like this
INSERT INTO `pages` (`pageid`, `createDate`, `archive`, `label`, `crawlid`, `wptid`, `wptrun`, `url`, `urlShort`, `urlhash`, `cdn`, `startedDateTime`, `TTFB`, `renderStart`, `onContentLoaded`, `onLoad`, `fullyLoaded`, `visualComplete`, `PageSpeed`, `SpeedIndex`, `rank`, `reqTotal`, `reqHtml`, `reqJS`, `reqCSS`, `reqImg`, `reqGif`, `reqJpg`, `reqPng`, `reqFont`, `reqFlash`, `reqJson`, `reqOther`, `bytesTotal`, `bytesHtml`, `bytesJS`, `bytesCSS`, `bytesImg`, `bytesGif`, `bytesJpg`, `bytesPng`, `bytesFont`, `bytesFlash`, `bytesJson`, `bytesOther`, `bytesHtmlDoc`, `numDomains`, `maxDomainReqs`, `numRedirects`, `numErrors`, `numGlibs`, `numHttps`, `numCompressed`, `numDomElements`, `maxageNull`, `maxage0`, `maxage1`, `maxage30`, `maxage365`, `maxageMore`, `gzipTotal`, `gzipSavings`, `_connections`, `_adult_site`, `avg_dom_depth`, `document_height`, `document_width`, `localstorage_size`, `sessionstorage_size`, `num_iframes`, `num_scripts`, `doctype`, `meta_viewport`, `reqAudio`, `reqVideo`, `reqText`, `reqXml`, `reqWebp`, `reqSvg`, `bytesAudio`, `bytesVideo`, `bytesText`, `bytesXml`, `bytesWebp`, `bytesSvg`, `num_scripts_async`, `num_scripts_sync`, `usertiming`)
INSERT INTO `pagesmobile` (`pageid`, `createDate`, `archive`, `label`, `crawlid`, `wptid`, `wptrun`, `url`, `urlShort`, `urlhash`, `cdn`, `startedDateTime`, `TTFB`, `renderStart`, `onContentLoaded`, `onLoad`, `fullyLoaded`, `visualComplete`, `PageSpeed`, `SpeedIndex`, `rank`, `reqTotal`, `reqHtml`, `reqJS`, `reqCSS`, `reqImg`, `reqGif`, `reqJpg`, `reqPng`, `reqFont`, `reqFlash`, `reqJson`, `reqOther`, `bytesTotal`, `bytesHtml`, `bytesJS`, `bytesCSS`, `bytesImg`, `bytesGif`, `bytesJpg`, `bytesPng`, `bytesFont`, `bytesFlash`, `bytesJson`, `bytesOther`, `bytesHtmlDoc`, `numDomains`, `maxDomainReqs`, `numRedirects`, `numErrors`, `numGlibs`, `numHttps`, `numCompressed`, `numDomElements`, `maxageNull`, `maxage0`, `maxage1`, `maxage30`, `maxage365`, `maxageMore`, `gzipTotal`, `gzipSavings`, `_connections`, `_adult_site`, `avg_dom_depth`, `document_height`, `document_width`, `localstorage_size`, `sessionstorage_size`, `num_iframes`, `num_scripts`, `doctype`, `meta_viewport`, `reqAudio`, `reqVideo`, `reqText`, `reqXml`, `reqWebp`, `reqSvg`, `bytesAudio`, `bytesVideo`, `bytesText`, `bytesXml`, `bytesWebp`, `bytesSvg`, `num_scripts_async`, `num_scripts_sync`, `usertiming`)
INSERT INTO `requests` (`requestid`, `pageid`, `startedDateTime`, `time`, `method`, `url`, `urlShort`, `redirectUrl`, `firstReq`, `firstHtml`, `reqHttpVersion`, `reqHeadersSize`, `reqBodySize`, `reqCookieLen`, `reqOtherHeaders`, `status`, `respHttpVersion`, `respHeadersSize`, `respBodySize`, `respSize`, `respCookieLen`, `expAge`, `mimeType`, `respOtherHeaders`, `req_accept`, `req_accept_charset`, `req_accept_encoding`, `req_accept_language`, `req_connection`, `req_host`, `req_if_modified_since`, `req_if_none_match`, `req_referer`, `req_user_agent`, `resp_accept_ranges`, `resp_age`, `resp_cache_control`, `resp_connection`, `resp_content_encoding`, `resp_content_language`, `resp_content_length`, `resp_content_location`, `resp_content_type`, `resp_date`, `resp_etag`, `resp_expires`, `resp_keep_alive`, `resp_last_modified`, `resp_location`, `resp_pragma`, `resp_server`, `resp_transfer_encoding`, `resp_vary`, `resp_via`, `resp_x_powered_by`, `_cdn_provider`, `_gzip_save`, `crawlid`, `type`, `ext`, `format`)
INSERT INTO `requestsmobile` (`requestid`, `pageid`, `startedDateTime`, `time`, `method`, `url`, `urlShort`, `redirectUrl`, `firstReq`, `firstHtml`, `reqHttpVersion`, `reqHeadersSize`, `reqBodySize`, `reqCookieLen`, `reqOtherHeaders`, `status`, `respHttpVersion`, `respHeadersSize`, `respBodySize`, `respSize`, `respCookieLen`, `expAge`, `mimeType`, `respOtherHeaders`, `req_accept`, `req_accept_charset`, `req_accept_encoding`, `req_accept_language`, `req_connection`, `req_host`, `req_if_modified_since`, `req_if_none_match`, `req_referer`, `req_user_agent`, `resp_accept_ranges`, `resp_age`, `resp_cache_control`, `resp_connection`, `resp_content_encoding`, `resp_content_language`, `resp_content_length`, `resp_content_location`, `resp_content_type`, `resp_date`, `resp_etag`, `resp_expires`, `resp_keep_alive`, `resp_last_modified`, `resp_location`, `resp_pragma`, `resp_server`, `resp_transfer_encoding`, `resp_vary`, `resp_via`, `resp_x_powered_by`, `_cdn_provider`, `_gzip_save`, `crawlid`, `type`, `ext`, `format`)
However the number of fields can be 73 or 88 depending on the time of the crawl as one year back we had slightly different data than now.
Hope this helps. LMK which specific month and table you want to analyse and I can help you further