Question

我有以下查询，这些查询计算按周创建的SELECT w.week, COUNT(doctor_profiles.*) AS total FROM (SELECT generate_series(min(DATE_TRUNC('week', created_at)), max(DATE_TRUNC('week', created_at)), interval '7 day' ) as week FROM doctor_profiles ) w LEFT JOIN "doctor_profiles" ON DATE_TRUNC('week', created_at) = w.week GROUP BY w.week ORDER BY w.week;条记录数

approved

我还有一个专栏COUNT(doctor_profiles.approved) as approved，我希望每周添加一笔总和。我尝试添加doctor_profiles（布尔字段），但计数返回与doctor_profiles相同的数字。如何查询在该时间段结束前已批准的所有grep "this is a test" * | wc -l的总和？

Answer 1

你可以这样做：

SELECT w.week, COUNT(*) AS total, SUM(approved::int) as approved
FROM (SELECT generate_series(min(DATE_TRUNC('week', created_at)),
                             max(DATE_TRUNC('week', created_at)),
                             interval '7 day'
                            ) as week
      FROM doctor_profiles
     ) w LEFT JOIN
     "doctor_profiles" dp
     ON DATE_TRUNC('week', created_at) = w.week
GROUP BY w.week
ORDER BY w.week;

在多列上生成系列计数

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