いくつかの同一のフィールド値を持つ4つのレコードのうちの1つだけを選択します

Question

私はMySQLクエリ（以下参照）を使ってスクリプトを実行していますが、これは期待どおりに機能します。

この問い合わせを行う電話システムでは、同じ通話に対して3つまたは4つのレコードが挿入されることがありますが、その理由はわかりませんが、実行時には電話ごとに1つのレコードしか必要ありません。私はこれが別のCalling_number, Start_Time, End_time, and Talk_Time_Secondsを見ることによって行われる必要があることを決めました。複製/同一の行は、これらの3つのフィールドの値が同じです。

クエリ自体は私たちが望むものであり、できるだけ再構成する必要はありませんが、これについてはいくつかの助けが必要です。

発信番号、開始時刻、終了時刻、通話時間が上記の値とまったく同じ値の場合、どのように区別する必要がありますか？

 SELECT 
      FirstN 
      , LastN 
      , Extension 
      , Recieved 
      , Recieved_Known 
      , Outbound 
      , Outbound_Known 
      , Missed_No_VM 
      , Missed_VM 
      , Missed_Known 
      , Calling_Number 
      , Called_Number 
      , Start_Time 
      , End_Time 
     , Talk_Time_Seconds 
      , Hold_Time_Seconds 

     FROM (
      SELECT 
      firstn 
      , lastn 
      , c.extension 
      , CASE WHEN LEGTYPE1 = 2 AND ANSWERED = 1 THEN 'x' ELSE '' END AS Recieved 
      , case when LEGTYPE1 = 2 and answered = 1 and CALLINGPARTYNO = k.phone_number then 'x' ELSE '' end as Recieved_Known 
      , CASE WHEN ANSWERED = 1 AND LEGTYPE1 = 1 then 'x' ELSE '' end AS Outbound 
      , case when LEGTYPE1 = 1 and FINALLYCALLEDPARTYNO = k.phone_number then 'x' ELSE '' end as Outbound_Known 
      , case when legtype1 = 2 and answered = 0 and finallycalledpartyno not like '%oice%' then 'x' ELSE '' end as Missed_No_VM 
      , case when finallycalledpartyno like '%oice%' then 'x' ELSE '' end as Missed_VM 
      , case when ANSWERED = 0 and CALLINGPARTYNO = k.phone_number then 'x' ELSE '' end as Missed_Known 
      , a.CALLINGPARTYNO AS Calling_Number 
      , a.FINALLYCALLEDPARTYNO AS Called_Number 
      , b.starttime as Start_Time 
      , b.endtime as End_Time 
      , b.duration as Talk_Time_Seconds 
      , a.holdtimesecs as Hold_Time_Seconds 

      FROM ambition.session a 
      INNER JOIN ambition.callsummary b ON a.NOTABLECALLID = b.NOTABLECALLID 
      right join jackson_id.users c on a.callingpartyno = c.extension or a.finallycalledpartyno = c.extension 
      LEFT JOIN ambition.known_numbers k ON a.callingpartyno = k.phone_number 
       WHERE a.ts >= curdate() 
       and(a.CALLINGPARTYNO in (select extension from ambition.ambition_users) OR a.finallycalledpartyno IN (select extension from ambition.ambition_users)) 
      ) x 
      order by extension; 

Answer 1

4列の上でROW_NUMBERパーティションを使用してみてください：

SELECT 
      FirstN 
      , LastN 
      , Extension 
      , Recieved 
      , Recieved_Known 
      , Outbound 
      , Outbound_Known 
      , Missed_No_VM 
      , Missed_VM 
      , Missed_Known 
      , Calling_Number 
      , Called_Number 
      , Start_Time 
      , End_Time 
     , Talk_Time_Seconds 
      , Hold_Time_Seconds 

     FROM (
      SELECT 
      firstn 
      , lastn 
      , c.extension 
      , CASE WHEN LEGTYPE1 = 2 AND ANSWERED = 1 THEN 'x' ELSE '' END AS Recieved 
      , case when LEGTYPE1 = 2 and answered = 1 and CALLINGPARTYNO = k.phone_number then 'x' ELSE '' end as Recieved_Known 
      , CASE WHEN ANSWERED = 1 AND LEGTYPE1 = 1 then 'x' ELSE '' end AS Outbound 
      , case when LEGTYPE1 = 1 and FINALLYCALLEDPARTYNO = k.phone_number then 'x' ELSE '' end as Outbound_Known 
      , case when legtype1 = 2 and answered = 0 and finallycalledpartyno not like '%oice%' then 'x' ELSE '' end as Missed_No_VM 
      , case when finallycalledpartyno like '%oice%' then 'x' ELSE '' end as Missed_VM 
      , case when ANSWERED = 0 and CALLINGPARTYNO = k.phone_number then 'x' ELSE '' end as Missed_Known 
      , a.CALLINGPARTYNO AS Calling_Number 
      , a.FINALLYCALLEDPARTYNO AS Called_Number 
      , b.starttime as Start_Time 
      , b.endtime as End_Time 
      , b.duration as Talk_Time_Seconds 
      , a.holdtimesecs as Hold_Time_Seconds 
      row_number() over (partition by a.CALLINGPARTYNO,b.starttime,b.endtime,b.duration order by 1) rn 
      FROM ambition.session a 
      INNER JOIN ambition.callsummary b ON a.NOTABLECALLID = b.NOTABLECALLID 
      right join jackson_id.users c on a.callingpartyno = c.extension or a.finallycalledpartyno = c.extension 
      LEFT JOIN ambition.known_numbers k ON a.callingpartyno = k.phone_number 
       WHERE a.ts >= curdate() 
       and(a.CALLINGPARTYNO in (select extension from ambition.ambition_users) OR a.finallycalledpartyno IN (select extension from ambition.ambition_users)) 
      ) x 
      where rn = 1 
      order by extension;