Linux OS Breakdown (DEV and PROD)
Nice capture of your Linux Estate
You will need two SQL Databases (one called LinuxDEV and one called LinuxPROD).   the Tables in each DB will need all OS Information (ex. Kernel, OS Versions. Hostname) to it can be pulled from SQL and put into PIE. 
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          "rawSql": "SELECT\n  NOW() as time_sec,\n  pie.cnt as value,\n  CONVERT(pie.category, char) as metric\nFROM (\n  SELECT \n    `OS Kernel` as category, \n    count(*) AS cnt\n  FROM `LinuxDEV`\n  GROUP BY `OS Kernel`\n) as pie\nGROUP BY pie.category\n",
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          "rawSql": "SELECT\n  NOW() as time_sec,\n  pie.cnt as value,\n  CONVERT(pie.category, char) as metric\nFROM (\n  SELECT \n    `OS Version` as category, \n    count(*) AS cnt\n  FROM `LinuxPROD`\n  GROUP BY `OS Version`\n) as pie\nGROUP BY pie.category\n",
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              "params": [
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              "type": "fill"
            }
          ],
          "metricColumn": "OS Version",
          "orderByTime": "ASC",
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          "rawQuery": true,
          "rawSql": "SELECT\n  NOW() as time_sec,\n  pie.cnt as value,\n  CONVERT(pie.category, char) as metric\nFROM (\n  SELECT \n    `Hostname` as category, \n    count(*) AS cnt\n  FROM `LinuxPROD`\n  GROUP BY `Hostname`\n) as pie\nGROUP BY pie.category\n",
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              "params": [
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          "rawSql": "select * from LinuxDEV group by `Hostname`",
          "refId": "A",
          "resultFormat": "time_series",
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      "title": "Full Listing DEV",
      "transform": "table",
      "type": "table"
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        "x": 0,
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          "rawSql": "select * from LinuxPROD",
          "refId": "A",
          "resultFormat": "time_series",
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                "type": "field"
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  "style": "dark",
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  "timezone": "",
  "title": "Linux OS Breakdown (DEV and PROD)",
  "uid": "mNtXmGRWk",
  "version": 47,
  "description": "Nice capture of your Linux Estate"
}