mysql查询中单个列中的条件

我有一个表名“social_user”，下面是一个名为“return”的列的屏幕截图-

我想从social_user表中计算用户数，其中返回等于0的用户为新_用户，返回大于0的用户为返回_用户，并且总用户输出应如以下屏幕截图所示：

我尝试了下面的查询，但不起作用-

select count(`return` = 0) as new, count(`return` > 0) as returning from social_user

---

我想你需要条件和而不是计数

select
sum(`return` = 0) as `new`,
sum(`return` > 0) as returning,
count(*) as total_user
from social_user

您可以这样做：

SELECT
    SUM(CASE WHEN `return` = 0 THEN 1 ELSE 0 END) AS new_user,
    SUM(CASE WHEN `return` > 0 THEN 1 ELSE 0 END) AS returning_user,
    SUM(CASE WHEN `return` >= 0 THEN 1 ELSE 0 END AS total_user
FROM
    social_user