Sql server 2005 SQL计数问题

我正在制作一份工作报告，其中包括5列，都包含v1aa、v1ab和v1ac

我想做的是计算5列中的所有v1aa并显示结果（v1ab和v1ac也是如此）

下面是我希望显示的示例：-

Amber = 3 (v1aa code)
Blue =  2 (v1ab code)
Red  = 1 (v1ac code)

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有谁能给我一些如何开始的建议吗？

我需要查看数据才能确定，但听起来像是一个问题。

这就是你要找的吗

SELECT
    SUM((CASE WHEN Column1 = 'v1aa' THEN 1 ELSE 0 END)
        + (CASE WHEN Column2 = 'v1aa' THEN 1 ELSE 0 END)
        + (CASE WHEN Column3 = 'v1aa' THEN 1 ELSE 0 END)
        + (CASE WHEN Column4 = 'v1aa' THEN 1 ELSE 0 END)
        + (CASE WHEN Column5 = 'v1aa' THEN 1 ELSE 0 END))
    AS Amber,
    SUM((CASE WHEN Column1 = 'v1ab' THEN 1 ELSE 0 END)
        + (CASE WHEN Column2 = 'v1ab' THEN 1 ELSE 0 END)
        + (CASE WHEN Column3 = 'v1ab' THEN 1 ELSE 0 END)
        + (CASE WHEN Column4 = 'v1ab' THEN 1 ELSE 0 END)
        + (CASE WHEN Column5 = 'v1ab' THEN 1 ELSE 0 END))
    AS Blue,
    SUM((CASE WHEN Column1 = 'v1ac' THEN 1 ELSE 0 END)
        + (CASE WHEN Column2 = 'v1ac' THEN 1 ELSE 0 END)
        + (CASE WHEN Column3 = 'v1ac' THEN 1 ELSE 0 END)
        + (CASE WHEN Column4 = 'v1ac' THEN 1 ELSE 0 END)
        + (CASE WHEN Column5 = 'v1ac' THEN 1 ELSE 0 END))
    AS Red
FROM
    dbo.MyTable

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我想这会让你开始的。如果可能为空，或者数据中可能存在不希望在报表中显示的其他代码，则可能需要添加WHERE子句

SELECT CASE i.code
    WHEN 'v1aa' THEN 'Amber'
    WHEN 'v1ab' THEN 'Blue'
    WHEN 'v1ac' THEN 'Red' END,
    COUNT(*)
FROM
(
    SELECT Col1 AS Code FROM Test
    UNION ALL SELECT Col2 FROM Test
    UNION ALL SELECT Col3 FROM Test
    UNION ALL SELECT Col4 FROM Test
    UNION ALL SELECT Col5 FROM Test
) i
GROUP BY i.Code

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如果要为每条记录计算这些计数，请尝试：

Select
    Case When Col1 Like '%v1aa%' Then 1 Else 0 End +
    Case When Col2 Like '%v1aa%' Then 1 Else 0 End +
    Case When Col3 Like '%v1aa%' Then 1 Else 0 End +
    Case When Col4 Like '%v1aa%' Then 1 Else 0 End +
    Case When Col5 Like '%v1aa%' Then 1 Else 0 End As AmberCount,
    Case When Col1 Like '%v1ab%' Then 1 Else 0 End +
    Case When Col2 Like '%v1ab%' Then 1 Else 0 End +
    Case When Col3 Like '%v1ab%' Then 1 Else 0 End +
    Case When Col4 Like '%v1ab%' Then 1 Else 0 End +
    Case When Col5 Like '%v1ab%' Then 1 Else 0 End As BlueCount,
    Case When Col1 Like '%v1ac%' Then 1 Else 0 End +
    Case When Col2 Like '%v1ac%' Then 1 Else 0 End +
    Case When Col3 Like '%v1ac%' Then 1 Else 0 End +
    Case When Col4 Like '%v1ac%' Then 1 Else 0 End +
    Case When Col5 Like '%v1ac%' Then 1 Else 0 End As RedCount
From MyTable

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如果您想要整个表的计数，那么添加一个Sum（）聚合函数，正如Timothy Khouri在他的回答中所建议的那样

您可以发布一些示例数据吗？