Tech Detections dashboard

definitions/output/scratchspace/meta_technologies.js

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+const pastMonth = constants.fnPastMonth(constants.currentMonth)
+
+publish('meta_technologies', {
+  type: 'table',
+  description: 'Used in dashboard: https://lookerstudio.google.com/u/7/reporting/1jh_ScPlCIbSYTf2r2Y6EftqmX9SQy4Gn/page/p_an38lbzywc/edit',
+  schema: 'scratchspace',
+  tags: ['crawl_results']
+}).query(ctx => `
+WITH source AS (
+  SELECT DISTINCT
+    date,
+    root_page AS page,
+    tech.technology
+  FROM ${ctx.ref('crawl', 'pages')},
+    UNNEST(technologies) AS tech
+  WHERE date >= "${pastMonth}" ${constants.devRankFilter}
+),
+-- Technology in the previous month (August)
+tech_before AS (
+  SELECT
+    page,
+    technology
+  FROM source
+  WHERE date = "${pastMonth}"
+),
+-- Technology in the current month (September)
+tech_current AS (
+  SELECT
+    page,
+    technology
+  FROM source
+  WHERE date = "${constants.currentMonth}"
+),
+-- Summary of technology and categories per page in the previous month
+tech_before_summary AS (
+  SELECT
+    technology,
+    COUNT(DISTINCT page) AS total_pages_before
+  FROM tech_before
+  GROUP BY technology
+),
+-- Pages that existed last month but introduced the technology in the current month
+tech_introduced_existing_pages AS (
+  SELECT
+    tech_current.technology,
+    COUNT(DISTINCT tech_current.page) AS total_pages_introduced_existing,
+    STRING_AGG(DISTINCT tech_current.page LIMIT 5) AS sample_pages_introduced_existing
+  FROM tech_current
+  JOIN tech_before
+  USING (page)
+  LEFT JOIN tech_before AS tb
+  ON tech_current.page = tb.page AND tech_current.technology = tb.technology
+  WHERE tb.page IS NULL  -- Technology was not detected last month
+  GROUP BY tech_current.technology
+),
+-- Pages that were not in the dataset last month but appeared this month with the technology
+tech_introduced_new_pages AS (
+  SELECT
+    tech_current.technology,
+    COUNT(DISTINCT tech_current.page) AS total_pages_introduced_new,
+    STRING_AGG(DISTINCT tech_current.page LIMIT 5) AS sample_pages_introduced_new
+  FROM tech_current
+  LEFT JOIN tech_before
+  USING (page)
+  WHERE tech_before.page IS NULL  -- Page was not present last month
+  GROUP BY tech_current.technology
+),
+-- Pages that existed this month but no longer have the technology
+tech_deprecated_existing_pages AS (
+  SELECT
+    tech_before.technology,
+    COUNT(DISTINCT tech_before.page) AS total_pages_deprecated_existing,
+    STRING_AGG(DISTINCT tech_before.page LIMIT 5) AS sample_pages_deprecated_existing
+  FROM tech_before
+  JOIN tech_current
+  USING (page)
+  LEFT JOIN tech_current AS tc
+  ON tech_before.page = tc.page AND tech_before.technology = tc.technology
+  WHERE tc.page IS NULL  -- Technology is not detected in the current month
+  GROUP BY tech_before.technology
+),
+-- Pages that no longer exist in the current dataset
+tech_deprecated_gone_pages AS (
+  SELECT
+    tech_before.technology,
+    COUNT(DISTINCT tech_before.page) AS total_pages_deprecated_gone,
+    STRING_AGG(DISTINCT tech_before.page LIMIT 5) AS sample_pages_deprecated_gone
+  FROM tech_before
+  LEFT JOIN tech_current
+  USING (page)
+  WHERE tech_current.page IS NULL  -- Page no longer exists in current dataset
+  GROUP BY tech_before.technology
+)
+
+-- Final aggregation and comparison of technology adoption/deprecation metrics
+SELECT
+  COALESCE(before_summary.technology, tech_introduced_existing_pages.technology, tech_introduced_new_pages.technology) AS technology,
+
+  -- Pages summary
+  0-COALESCE(total_pages_deprecated_existing, 0) AS total_pages_deprecated_existing,
+  0-COALESCE(total_pages_deprecated_gone, 0) AS total_pages_deprecated_gone,
+
+  COALESCE(total_pages_before, 0) - COALESCE(total_pages_deprecated_existing, 0) - COALESCE(total_pages_deprecated_gone, 0) AS total_pages_persisted,
+
+  COALESCE(total_pages_introduced_existing, 0) AS total_pages_introduced_existing,
+  COALESCE(total_pages_introduced_new, 0) AS total_pages_introduced_new,
+
+  -- Sample pages
+  COALESCE(sample_pages_deprecated_existing, "") AS sample_pages_deprecated_existing,
+  COALESCE(sample_pages_deprecated_gone, "") AS sample_pages_deprecated_gone,
+
+  COALESCE(tech_introduced_existing_pages.sample_pages_introduced_existing, "") AS sample_pages_introduced_existing,
+  COALESCE(tech_introduced_new_pages.sample_pages_introduced_new, "") AS sample_pages_introduced_new
+
+FROM tech_before_summary before_summary
+FULL OUTER JOIN tech_introduced_existing_pages
+  ON before_summary.technology = tech_introduced_existing_pages.technology
+FULL OUTER JOIN tech_introduced_new_pages
+  ON before_summary.technology = tech_introduced_new_pages.technology
+LEFT JOIN tech_deprecated_existing_pages
+  ON before_summary.technology = tech_deprecated_existing_pages.technology
+LEFT JOIN tech_deprecated_gone_pages
+  ON before_summary.technology = tech_deprecated_gone_pages.technology
+ORDER BY total_pages_persisted DESC
+`)