在 SQL Server 中替代 COUNTIF

Question

我在 SQL Server 上使用

COUNTIF

来

COUNT

具有条件的特定值，但它出现了错误。

SELECT 
    total rounds, total member, total customer,
    ROUND(total rounds/total member, 2) * 100 AS memberper
FROM 
    (SELECT 
         COUNT(rideid) total rounds
         COUNTIF(member_customer = 'member') AS total member,
         COUNTIF(member_customer = 'customer') AS total customer
     FROM 
         Data)