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在比尔特创造不均的海图间隔
原标题:Create uneven chart intervals in Birt

我在书刊中有一个图表,大约80个数据点。 I m 期望将其分为三个编目;17-20和20。 更具体地说,Im试图制作红色黄色绿色图。

我如何能够这样做。 我尝试了分组职能,但只允许我可以找到的间隔时间。

Thanks, Buzkie

最佳回答

在您的问询中使用化学文摘社国际协会的表述,以形成一个衍生的栏目:

SELECT someval, CASE WHEN (someval < 17) THEN  Red 
    WHEN (someval >= 17 AND someval <= 20) THEN  Yellow 
    ELSE  Green  END AS wedgeColor
FROM sometable

然后,可以将书记簿中的表格与衍生栏而不是实际数据点数值挂钩。

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