我怎样才能使用 postgresql 对这个查询的结果求和?:
SELECT SUM(value) FROM credit_balance
SELECT SUM(value) FROM debit_balance
我试过了,但是没用:
SELECT SUM(SELECT SUM(value) FROM credit_balance UNION ALL SELECT SUM(value) FROM debit_balance)
最佳答案
SELECT
(SELECT SUM(value) FROM credit_balance) + (SELECT SUM(value) FROM debit_balance)
关于sql - 将两个 SUM 函数相加,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/26045957/