通过表d数据使用sql计算每个老师的连续上课天数

好的，我明白了您的问题。您可以使用以下SQL语句来计算每个老师的连续上课天数：

SELECT 
    TeacherName, 
    COUNT(*) AS ConsecutiveDays 
FROM (
    SELECT 
        *,
        ROW_NUMBER() OVER (PARTITION BY TeacherName ORDER BY ClassDate) AS RowNum,
        ROW_NUMBER() OVER (PARTITION BY TeacherName, IsTaught ORDER BY ClassDate) AS GrpNum
    FROM YourTable
) t
GROUP BY TeacherName, GrpNum - RowNum
HAVING COUNT(*) >= 1 AND IsTaught = 'Yes'

这里的`YourTable`是包含老师名称、课程日期以及是否上课的表格。该查询使用了`ROW_NUMBER()`窗口函数和分组运算来对老师和课程日期进行分组，并计算每个老师连续上课天数的数量。