私はこのようなSQLクエリでテーブルを表示するSQLクエリ

Question

で毎日数：

私は私のクエリを実行している：

select 
    tb_r_orderdata.finishtime as date , 
    count(*)sum all, 
    sum(when status = 'SUCCESS' and issync = '1' then 1 else 0 end) sumpaid, 
    sum(when status = 'SUCCESS' and issync in ('3', '4') then 1 else 0 end) sumfail, 
    sum(when status = 'CLOSED' then 1 else 0 end) sumclose, 
    sum(when status = 'Null' then 1 else 0 end) sumunflag 
from 
    tb_r_orderdata; 

しかし、ときに私はそれを実行し、結果は私が予想したものとは異なります。

あなたがGROUP BYとCASEが欠落している任意のヘルプ

Answer 1

いただきありがとうございます：：

select tb_r_orderdata.finishtime as date , 
     COUNT(*) as sumall, 
     SUM(CASE WHEN status='SUCCESS' AND issync='1' then 1 ELSE 0 END) as sumpaid, 
     SUM(CASE WHEN status='SUCCESS' AND issync in ('3','4') then 1 ELSE 0 END) as sumfail, 
     SUM(CASE WHEN status='CLOSED' then 1 ELSE 0 END) as sumclose, 
     SUM(CASE WHEN status is null then 1 ELSE 0 END) as sumunflag 
from tb_r_orderdata 
group by tb_r_orderdata.finishtime ; 

MySQLは、数値コンテキストで整数としてブール値を扱う結果はこのようなものですtrueの場合は「1」、falseの場合は「0」となります。クエリを簡略化すると、

select o.finishtime as date , 
     COUNT(*) as sumall, 
     SUM(status = 'SUCCESS' AND issync = '1') as sumpaid, 
     SUM(status = 'SUCCESS' AND issync in ('3', '4')) as sumfail, 
     SUM(status = 'CLOSED') as sumclose, 
     SUM(status is null) as sumunflag 
from tb_r_orderdata o 
where tb_r_orderdata.finishtime is not NULL 
group by o.finishtime ; 

完了時刻はNULLになります。

Answer 2

私はあなたの答えをしようと持っていますが、レコードNULLがテーブルの上にあったゴードン・リノフ

にコメントで説明、私はあなたが少しでそれを

を説明することができ、なぜ知りませんゴードンリノフの回答からのビットの変更

select tb_r_orderdata.finishtime as date , 
     SUM(CASE WHEN status='SUCCESS' AND issync='1' then 1 ELSE 0 END) as sumpaid, 
     SUM(CASE WHEN status='SUCCESS' AND issync in ('3','4') then 1 ELSE 0 END) as sumfail, 
     SUM(CASE WHEN status='CLOSED' then 1 ELSE 0 END) as sumclose, 
     SUM(CASE WHEN status='NULL' then 1 ELSE 0 END) as sumunflag 
from tb_r_orderdata 
group by tb_r_orderdata.finishtime