Sql Teradata返回零除错误-如何寻址？

下面的查询使用带有一些除法的case语句。然而，它被零除错误所困扰。任何关于如何处理错误异常的想法都将不胜感激

CASE 
    WHEN Channel = 'DA' THEN  CAST (CASE_QTY AS DECIMAL(38,0))/SUM(CAST(CASE_QTY AS DECIMAL(38,2))) OVER (PARTITION BY ld.LOAD_ID) 
    WHEN Channel = 'SS' THEN  CAST (CASE_QTY AS DECIMAL(38,0))/SUM(CAST(CASE_QTY AS DECIMAL(38,2))) OVER (PARTITION BY ld.LOAD_ID) 
    WHEN Channel = 'XDOCK' THEN  CAST (CASE_QTY AS DECIMAL(38,0))/SUM(CAST(CASE_QTY AS DECIMAL(38,2))) OVER (PARTITION BY ld.LOAD_ID)
    WHEN Channel = '?' THEN  CAST (CASE_QTY AS DECIMAL(38,0))/SUM(CAST(CASE_QTY AS DECIMAL(38,2))) OVER (PARTITION BY ld.LOAD_ID) 
    ELSE 0
    END AS Percentage

---

你可以用另一个箱子检查一下

  CASE  WHEN SUM(CAST(CASE_QTY AS DECIMAL(38,2)) <> 0 THEN
              WHEN Channel = 'DA' THEN  CAST (CASE_QTY AS DECIMAL(38,0))/SUM(CAST(CASE_QTY AS DECIMAL(38,2))) OVER (PARTITION BY ld.LOAD_ID)
        THEN -1 /*  or the value you prefer for zero value */
        END
   ....  

CASE WHEN SUM（CAST_数量为十进制（38,2））0然后
当通道='DA'时，则在（按ld.LOAD\U ID分区）上进行转换（以十进制（38,0）表示大小写数量）/求和（以十进制（38,2）表示大小写数量）
然后是-1/*或您喜欢的零值*/
结束
....  

您可以使用另一个案例进行检查

  CASE  WHEN SUM(CAST(CASE_QTY AS DECIMAL(38,2)) <> 0 THEN
              WHEN Channel = 'DA' THEN  CAST (CASE_QTY AS DECIMAL(38,0))/SUM(CAST(CASE_QTY AS DECIMAL(38,2))) OVER (PARTITION BY ld.LOAD_ID)
        THEN -1 /*  or the value you prefer for zero value */
        END
   ....  

CASE WHEN SUM（CAST_数量为十进制（38,2））0然后
当通道='DA'时，则在（按ld.LOAD\U ID分区）上进行转换（以十进制（38,0）表示大小写数量）/求和（以十进制（38,2）表示大小写数量）
然后是-1/*或您喜欢的零值*/
结束
....  

只需使用

NULLIF

。此外，您可以将查询简化为：

CASE 
    WHEN Channel IN ('DA','SS','XDOCK','?') 
      THEN Cast(CASE_QTY AS DECIMAL(38,0))/NullIf(Sum(Cast(CASE_QTY AS DECIMAL(38,2))) Over (PARTITION BY ld.LOAD_ID),0) 
    ELSE 0
END AS Percentage

---

只需使用

NULLIF

。此外，您可以将查询简化为：

CASE 
    WHEN Channel IN ('DA','SS','XDOCK','?') 
      THEN Cast(CASE_QTY AS DECIMAL(38,0))/NullIf(Sum(Cast(CASE_QTY AS DECIMAL(38,2))) Over (PARTITION BY ld.LOAD_ID),0) 
    ELSE 0
END AS Percentage

---

这给了我一个语法错误“预期介于''和'”@Jeremy:Ops，忘记了

，0

，已修复。这给了我一个语法错误“预期介于''和'”@Jeremy:Ops，忘记了

，0

，已修复。