Mysql 如何将具有不同列的两个查询合并为一个查询？

如何将这两个查询合并到一个表中。它们是两个不同的结果，所以我需要它们是两个不同的列。我试过联合，但那使他们成为一个专栏

SELECT COUNT(*) AS Number_Customers FROM customer
Where cus_balance > 0;
Select SUM(cus_balance) AS Total_Balances
FROM customer;

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将它们重写为子查询，并使用

DUAL

作为伪表

SELECT
   (SELECT COUNT(*) FROM customer WHERE cus_balance > 0) AS Number_Customers,
   (SELECT SUM(cus_balance) FROM customer) AS Total_Balances
FROM DUAL;

如果

WHERE

子句可能是相同的，那么您可以这样编写：

SELECT COUNT(*) AS Number_Customers,
       SUM(cus_balance) AS Total_Balances
FROM Cusomers
WHERE cus_balance > 0;