查询Oracle时出错：不是单组组功能

Question

我对 Oracle ：

进行了查询

SELECT count(*),SUM(price) as total_price,
  (SELECT count(*) as total_card_success FROM Card_trans WHERE status = 4)
FROM Card_trans;

执行时，显示错误：

ORA-00937: not a single-group group function
00937. 00000 -  "not a single-group group function"

如何解决这个问题。感谢

Answer 1

如果您只想计算Unicode

的行数

status = 4