SQL - 最大日期

Question

基本上我想为数据集中的每个[typecode]提取最高[生效日期] ...

HIC         CODE PROVIDER DATE                   TYPECODE EFFECTIVE DATE
028207696D  10   347330  2014-09-15 00:00:00.000    0     2014-10-10 00:00:00.000
028207696D  10   347330  2014-09-15 00:00:00.000    0     2015-01-30 00:00:00.000
028207696D  10   347330  2014-09-15 00:00:00.000    1     2015-01-23 00:00:00.000
028207696D  10   347330  2014-09-15 00:00:00.000    1     2015-02-06 00:00:00.000
028207696D  10   347330  2014-09-15 00:00:00.000    2     2015-02-06 00:00:00.000

看起来像这样：

HIC         CODE PROVIDER DATE                   TYPECODE EFFECTIVE DATE
028207696D  10   347330  2014-09-15 00:00:00.000    0     2015-01-30 00:00:00.000
028207696D  10   347330  2014-09-15 00:00:00.000    1     2015-02-06 00:00:00.000
028207696D  10   347330  2014-09-15 00:00:00.000    2     2015-02-06 00:00:00.000

Answer 1

SELECT HIC,CODE,PROVIDER DATE,TypeCode,MAX([Effective Date])[Effective Date]
FROM <TABLE>
GROUP BY HIC,CODE,PROVIDER DATE,TypeCode