The state column is an enum of type ["approved", "declined"]. Transaction Table Description Table: Transaction 二、题目信息 查询每个月和每个国家/地区的交易次数及其总金额,批准的交易次数及其总金额。 Write an SQL query to find for each month and country, the number of transactions and their tot...
The state column is an enum of type ["approved", "declined"]. Transaction Table Description Table: Transaction 表二:Chargebacks Table 该表包含“Transaction”表中的某些退款情况。 trans_id 是“Transaction”表 id 列的外键。 即使未获批准,每个退款都对应于先前进行的交易。 Chargebacks contains basic ...