sql - SQL (Oracle) - 2 つのカウント ステートメントから比率を取得する方法は?

Question

準拠率を示す count1 / count2 の比率を取得したいと考えて
います。これは私の指先のすぐ下にあります...
助けてもらえますか?

Select 
 (
 Select Count (*) from tso_skf_nomeas_in60days_v 
 ) as count1, 
 (
 Select Count (*) from tso_skf_recent_meas
 ) as count2
 (
 from dual

Answer 1

あなたはかなり近いです：

Select 
    (Select Count (*) from tso_skf_nomeas_in60days_v) 
    / 
    (Select Count (*) from tso_skf_recent_meas) as perc
from dual

SQLフィドルデモ

Answer 2

SELECT
(SELECT cast(COUNT(*) as float) FROM tso_skf_nomeas_in60days_v)
/
(SELECT cast(COUNT(*) as float) FROM tso_skf_recent_meas) as perc
FROM dual

Answer 3

更新された回答:

Select Count1/Count2
FROM (Select Count(*) Count1 From tso_skf_nomeas_in60days_v) tso_skf_nomeas_in60days_v,
(Select Count(*) Count2 From tso_skf_recent_meas) tso_skf_recent_meas;

SQL Fiddleを参照してください。

最終結果: