Question

尝试在SQL 2008R2中创建存储过程。我有两个参数输入，根据它们的输入，理想情况下将另一个参数的值设置为四个值中的一个。试图确定是否可以这样做，如果可以，那么将它放在SP中的最佳位置在哪里。这是我的代码的精简版。

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希望用@Wear替换所有w.WearRate，并根据两个参数的组合将@Wear设置为视图中四个可能字段之一。

类似于：

{
  "ids": [
    84280,
    2334,
    235,
    32554,
    3663,
    346,
    344643,
    ....,
    n
  ]
}

由于我有150多行处理此速率的代码，我宁愿不必编写此代码4次以获得所需的值。任何帮助我如何写这个并保持干净/简单将不胜感激。

Answer 1

您可以将所有代码缩减为此类内容。

SELECT w.EMCo, w.Component,w.CompType, CASE 
WHEN @FW = 'Y' AND @NEW = 'Y' THEN w.FwIdleWearRate
WHEN @FW = 'Y' AND @NEW = 'N' THEN w.FwWearRate
WHEN @FW = 'N' AND @NEW = 'Y' THEN w.IdleWearRate
ELSE w.StdWearRate
END AS WearRate
FROM bcvEMCompWearAdj w

Answer 2

我的问题的解决方案最终是创建一个临时表并插入我想要使用的WearRate。

If OBJECT_ID('tempdb.dbo.#TempWear','U') IS NOT NULL 
Drop Table #TempWear;

Create Table #TempWear 
    EMCo tinyint Null,
    Component varchar(10) NULL,
    CompType varchar(10) NULL,
    WearRate decimal(38,5) NULL
    );

if @FW = 'Y' and @New = 'Y'
Begin
    Insert into #TempWear
    (EMCo, Component, CompType, WearRate)
    select w.EMCo, w.Component,w.CompType, w.FwIdleWearRate 
    from bcvEMCompWearAdj w
END
else 
if @FW = 'Y' and @New = 'N'
Begin
    Insert into #TempWear
    (EMCo, Component, CompType, WearRate)
    select w.EMCo, w.Component,w.CompType, w.FwWearRate 
    from bcvEMCompWearAdj w
END
else
if @FW = 'N' and @New = 'Y'
Begin
    Insert into #TempWear
    (EMCo, Component, CompType, WearRate)
    sselect w.EMCo, w.Component,w.CompType, w.IdleWearRate
    from bcvEMCompWearAdj w
END
else
--if @FW = 'N' and @New = 'N'
Begin
    Insert into #TempWear
    (EMCo, Component, CompType, WearRate)
    select w.EMCo, w.Component,w.CompType, w.StdWearRate    
    from bcvEMCompWearAdj w
END

存储过程设置参数基于其他参数输入

2 个答案: