将IF函数从Excel转换为SQL

Question

名为＆＃34; DED_LAYER_BENCHMARK_LP＆＃34;的新列是从Excel IF函数创建的，如下所示。

DED_LAYER_BENCHMARK_LP =  =if(_DataCell_ULFBL<=_InputCell_Deductible,

_DataCell_Original_Bench_LP_r0000_c0000,0) + 
if(_DataCell_ULFBL + _InputCell_Layer_r0000_c0000 <= _InputCell_Deductible,
    _DataCell_Original_Bench_LP_r0001_c0000, 0)

我想在SQL代码中编写上面的excel代码

Answer 1

使用CASE表达式：

CASE WHEN _DataCell_ULFBL <= _InputCell_Deductible
     THEN _DataCell_Original_Bench_LP_r0000_c0000
     ELSE 0 END +
CASE WHEN _DataCell_ULFBL + _InputCell_Layer_r0000_c0000 <= _InputCell_Deductible
     THEN _DataCell_Original_Bench_LP_r0001_c0000 ELSE 0 END AS DED_LAYER_BENCHMARK_LP

Answer 2

使用CASE 语句表达式。

CASE 
 WHEN _DataCell_ULFBL <= _InputCell_Deductible THEN _DataCell_Original_Bench_LP_r0000_c0000 
 ELSE 0 
END + 
CASE 
 WHEN _DataCell_ULFBL + _InputCell_Layer_r0000_c0000 <= _InputCell_Deductible THEN _DataCell_Original_Bench_LP_r0001_c0000
 ELSE 0
END AS DED_LAYER_BENCHMARK_LP

文档链接：https://docs.microsoft.com/en-us/sql/t-sql/language-elements/case-transact-sql