[英]Gracefully sum multiple columns in AWS Athena excluding nulls
我必须通过在 AWS Athena 中添加一些其他列来创建total_costs
、 total_proceeds
和total_net_loss
列。 我还必须用zeros
替换nulls
,否则结果将为 null。 我尝试使用sum()
函数,但它仅适用于单列。 以下查询完成了我想做的事情,但看起来很不雅观。 有没有其他更优雅的方法来对Athena
列求和?
SELECT loan_identifier,
monthly_reporting_period,
current_actual_upb,
current_loan_delinquency_status,
(COALESCE(foreclosure_costs,0) + COALESCE(property_preservation_and_repair_costs,0) + COALESCE(asset_recovery_costs,0) + COALESCE(miscellaneous_holding_expenses_and_credits,0) + COALESCE(associated_taxes_for_holding_property,0)) AS total_costs,
(COALESCE(net_sale_proceeds,0) + COALESCE(credit_enhancement_proceeds,0) + COALESCE(repurchase_make_whole_proceeds,0) + COALESCE(other_foreclosure_proceeds,0)) AS total_proceeds,
current_actual_upb + (current_actual_upb * ((current_interest_rate/100 - 0.0035)/12)*DATE_DIFF('day', last_paid_installement_date, disposition_date)/30) + (COALESCE(foreclosure_costs,0) + COALESCE(property_preservation_and_repair_costs,0) + COALESCE(asset_recovery_costs,0) + COALESCE(miscellaneous_holding_expenses_and_credits,0) + COALESCE(associated_taxes_for_holding_property,0)) - (COALESCE(net_sale_proceeds,0) + COALESCE(credit_enhancement_proceeds,0) + COALESCE(repurchase_make_whole_proceeds,0) + COALESCE(other_foreclosure_proceeds,0)) AS total_net_loss
FROM performance_data;
结合使用SUM
和COALESCE
,如下所示:
SELECT SUM(COALESCE(y, 0) + COALESCE(z, 0)) AS aggregate_sum_of_y_and_z
FROM (
VALUES (1, 2),
(NULL, 3),
(2, 1)) AS x (y, z)
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