Question

我的表格模式是ID，年份，城市，人口

数据如下所示

ID  |Year    |Chennai   |Salem    
--- |------- |------    | ----
1   | 2016   | 1200000  | 120000
2   | 2015   | 1100000  | 200000

我希望输出如下

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    font-size: 0.75em;
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    background-color: #333;
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    .l {
            color: #ae81ff;
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    .n {
            color: #f8f8f2;
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    /* Name */
    .o {
            color: #f92672;
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    /* Operator */
    .p {
            color: #f8f8f2;
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    /* Punctuation */
    .cm {
            color: #75715e;
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    /* Comment.Multiline */
    .cp {
            color: #75715e;
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    /* Comment.Preproc */
    .c1 {
            color: #75715e;
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    .cs {
            color: #75715e;
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            font-style: italic;
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            font-weight: bold;
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    .nc {
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    /* Name.Class */
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    .ni {
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    .ne {
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            color: #a6e22e;
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    /* Name.Function */
    .nl {
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    /* Name.Label */
    .nn {
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    .nx {
            color: #a6e22e;
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            color: #ae81ff;
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    .mo {
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    /* Literal.String.Interpol */
    .sx {
            color: #e6db74;
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    /* Literal.String.Other */
    .sr {
            color: #e6db74;
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    /* Literal.String.Regex */
    .s1 {
            color: #e6db74;
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    /* Literal.String.Single */
    .ss {
            color: #e6db74;
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    /* Literal.String.Symbol */
    .bp {
            color: #f8f8f2;
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    /* Name.Builtin.Pseudo */
    .vc {
            color: #f8f8f2;
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    /* Name.Variable.Class */
    .vg {
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    /* Name.Variable.Global */
    .vi {
            color: #f8f8f2;
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    /* Name.Variable.Instance */
    .il {
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    /* Literal.Number.Integer.Long */
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    /* Generic Heading & Diff Header */
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}

是否可以获得如上所述的输出

Answer 1

如果您只需要查询这两个城镇，可以使用：

SELECT *
FROM 
(
  SELECT ROW_NUMBER() OVER (partition by City Order by City) As [ID], [Year], [City], [Population]
  FROM YourTable
) src
PIVOT
(
  SUM([Population])
  for [City] in (Chennai, Salem)
) piv
ORDER BY ID

如果您需要它是动态的，您可以将其转换为表格值函数，并用字符串参数替换城镇。

如果你需要它是动态的并且总是显示所有城市，那么你可以这样做：

DECLARE @City nvarchar(255), @Cities nvarchar(max), @SQL nvarchar(max)

SET @Cities = ''

DECLARE cursor1 CURSOR FOR
SELECT DISTINCT City
FROM YourTable
OPEN cursor1
FETCH NEXT FROM cursor1 INTO @City

WHILE @@FETCH_STATUS = 0 BEGIN

    SET @Cities += @City + ', '

    FETCH NEXT FROM cursor1 INTO @City
END
CLOSE cursor1
DEALLOCATE cursor1

SET @Cities = SUBSTRING(@Cities, 0, LEN(@Cities))

SET @SQL = 'SELECT *
FROM 
(
  SELECT ROW_NUMBER() OVER (partition by City Order by City) As [ID], [Year], [City], [Population]
  FROM YourTable
) src
PIVOT
(
  SUM([Population])
  for [City] in ('+@Cities+')
) piv
ORDER BY ID'

EXEC(@SQL)

（之前没有使用过Pivot所以我认为解决这个问题很有意思:)）

如何使用SQL Server 2012获取以下输出

1 个答案: