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请任何人都可以提出一种压缩此代码的方法，以减少其重复性。非常感谢

    select case
    when c=1 and cs=1 and f=0 and fs=0 then 'FPL02'
    when c=0 and cs=0 and f=1 and fs=1 then 'FPL03'
    when c=1 and cs=0 and f=0 and fs=0 then 'FPL04'
    when c=0 and cs=0 and f=1 and fs=0 then 'FPL05'
    when c=1 and cs=1 and f=1 and fs=1 then 'FPL06'
    when c=1 and cs=1 and f=1 and fs=0 then 'FPL07'
    when c=1 and cs=0 and f=1 and fs=1 then 'FPL08'
    when c=1 and cs=0 and f=1 and fs=0 then 'FPL09'
    when Ab=1 then 'FPL10'
    when cpc=1 and plo=0 then 'FPC01'
    when cpc=0 and plo=1 then 'FPC02'
    when cpc=1 and plo=1 then 'FPC03'
    else 'FPL01' end

    from (select ptmatter, BillLHAbsolute as Ab, BillLHChildren as C, BillLHChildrenSettle as CS, BillLHFinances as F, BillLHFinancesSettle as FS, BillLHCPC as CPC, BillLHPLO as PLO from MatterDataDef) as mmd
    where ptmatter=$matter$
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1 回答 1

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在不同的列上有这么多不同的条件语句，我真诚地怀疑您是否可以压缩该代码，同时让其他人仍然可以维护它。

例如，你需要这个：

select case
    when c IN (0, 1) AND cs IN (0, 1) AND f IN (0, 1) AND fs IN (0, 1) then
        case     
            when c=1 and cs=1 and f=1 and fs=0 then 'FPL07'     
            when c=1 and cs=0 and f=1 and fs=0 then 'FPL09'     
            else 'FPL0' + cast(c * 5 + f * 6 - cs * 2 - fs * 2 - 1 as char(1))
        end
    when Ab = 1 then 
        'FPL10'
    when cpc IN (0, 1) AND plo IN (0, 1) then
        'FPC0' + cast(cpc * 1 + plo * 2 as char(1))
    else 
        'FPL01' 
    end

它是浓缩的（有点），但是你用更少的行来换取更少的可读性。

总而言之，真的没有那么多WHEN说法。

于 2012-07-30T15:30:56.750 回答