Sql h_tool，tfacet.estfa_tool，但是查询会为每个工具返回2行章节和方面匹配，而我需要为每个工具返回一行章节和方面匹配的总计数。想法？那么，你就得调试你的查询了。也许您在某个地方加入了一个表，该表将结果集扩展为2（在这种情况下，您应该缺少W

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h_tool，tfacet.estfa_tool，但是查询会为每个工具返回2行章节和方面匹配，而我需要为每个工具返回一行章节和方面匹配的总计数。想法？那么，你就得调试你的查询了。也许您在某个地方加入了一个表，该表将结果集扩展为2（在这种情况下，您应该缺少WHERE子句）？啊，调试和调优SQL的乐趣。。。

SELECT *
FROM ES_TOOL
  INNER JOIN ES_HARDWARE ON ES_HARDWARE.eshw_ID = ES_TOOL.ESTOOL_HARDWARE 
  INNER JOIN ES_PAYMENT  on ES_payment.espay_id = es_TOOL.estool_payment 

  LEFT JOIN (
    SELECT
      tchap.estch_tool, tfacet.estfa_tool,
      count(marks.esmrk_value) AmtMarks 
    FROM ES_MARK marks 
      left Join ES_TOOL_FACET tfacet ON marks.esmark_tool_facet = tfacet.estfa_id --line added
      left Join ES_TOOL_CHAPTER tchap ON marks.esmark_tool_chapter = tchap.estch_id 
    GROUP BY tchap.estch_tool 
  ) h  ON ES_TOOL.estool_id = h.estch_tool

SELECT  tchap.estch_tool, tfacet.estfa_tool,  count(marks.esmrk_value) AmtMarks 
FROM ES_MARK marks 
  left Join ES_TOOL_FACET tfacet ON marks.esmark_tool_facet = tfacet.estfa_id --line added
  left Join ES_TOOL_CHAPTER tchap ON marks.esmark_tool_chapter = tchap.estch_id 
GROUP BY tchap.estch_tool 

SELECT  
            tchap.estch_tool, 
            tfacet.estfa_tool,  
            count(marks.esmrk_value) AmtMarks 
        FROM ES_MARK marks   
            left Join ES_TOOL_FACET tfacet ON 
                marks.esmark_tool_facet = tfacet.estfa_id --line added  
            left Join ES_TOOL_CHAPTER tchap ON 
                marks.esmark_tool_chapter = tchap.estch_id  
        GROUP BY tchap.estch_tool  

SELECT *
FROM ES_TOOL
  INNER JOIN ES_HARDWARE ON ES_HARDWARE.eshw_ID = ES_TOOL.ESTOOL_HARDWARE 
  INNER JOIN ES_PAYMENT  on ES_payment.espay_id = es_TOOL.estool_payment 

  LEFT JOIN (
    SELECT
      tools.tool,
      COUNT(*) AS AmtMarks
    FROM (
      SELECT 'tchap'  AS tbl, estch_id AS id, estch_tool AS tool
      FROM ES_TOOL_CHAPTER

      UNION ALL

      SELECT 'tfacet' AS tbl, estfa_id AS id, estfa_tool AS tool
      FROM ES_TOOL_FACET
    ) tools
      INNER JOIN ES_MARK marks
        ON tools.tbl = 'tchap'  AND tools.id = marks.esmark_tool_chapter
        OR tools.tbl = 'tfacet' AND tools.id = marks.esmark_tool_facet
    GROUP BY tools.tool
  ) h ON ES_TOOL.estool_id = h.tool

SELECT *
FROM ES_TOOL
  INNER JOIN ES_HARDWARE ON ES_HARDWARE.eshw_ID = ES_TOOL.ESTOOL_HARDWARE 
  INNER JOIN ES_PAYMENT  on ES_payment.espay_id = es_TOOL.estool_payment 

  LEFT JOIN (
    SELECT
      tools.tool,
      COUNT(*) AS AmtMarks
    FROM (
      SELECT estch_tool AS tool
      FROM ES_TOOL_CHAPTER tools
        INNER JOIN ES_MARK marks ON tools.estch_id = marks.esmark_tool_chapter

      UNION ALL

      SELECT estfa_tool AS tool
      FROM ES_TOOL_FACET tools
        INNER JOIN ES_MARK marks ON tools.estfa_id = marks.esmark_tool_facet
    ) tools
    GROUP BY tools.tool
  ) h ON ES_TOOL.estool_id = h.tool