Question

我有一个用户表及其日期范围，采用INT格式（yyyymmdd），如下所示：

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我需要为每个用户找到连续的唯一日期范围（没有任何重复）。输出应该是这样的

Id  Name    StartDate   EndDate
1   abc     20160216    20160217
1   abc     20160228    20160228
1   abc     20160301    20160301
1   abc     20160301    20160302
1   abc     20160301    20170401
1   abc     20160302    20160302
1   abc     20160303    20160303
1   abc     20160303    20170401
3   def     20160217    20160217
3   def     20160218    20160229
3   def     20160218    20160229
3   def     20160225    20160225
3   def     20160229    20160229
3   def     20160302    20160302

使用此脚本，您可以创建表格：

 Id Name    StartDate   EndDate
1   abc     20160216    20160217
1   abc     20160228    20160228
1   abc     20160301    20170401
3   def     20160217    20160229
3   def     20160302    20160302

编辑：简而言之，如果我有这样的数据

CREATE TABLE #data
(
 Id INT,
 Name VARCHAR(50),
 StartDate INT,
 EndDate INT,
)
INSERT INTO #data VALUES(1,'abc',20160216,20160217)
INSERT INTO #data VALUES(1,'abc',20160228,20160228)
INSERT INTO #data VALUES(1,'abc',20160301,20160301)
INSERT INTO #data VALUES(1,'abc',20160301,20160302)
INSERT INTO #data VALUES(1,'abc',20160301,20170401)
INSERT INTO #data VALUES(1,'abc',20160302,20160302)
INSERT INTO #data VALUES(1,'abc',20160303,20160303)
INSERT INTO #data VALUES(1,'abc',20160303,20170401)
INSERT INTO #data VALUES(3,'def',20160217,20160217)
INSERT INTO #data VALUES(3,'def',20160218,20160229)
INSERT INTO #data VALUES(3,'def',20160218,20160229)
INSERT INTO #data VALUES(3,'def',20160225,20160225)
INSERT INTO #data VALUES(3,'def',20160229,20160229)
INSERT INTO #data VALUES(3,'def',20160302,20160302)

我需要输出如下。

Id  Name    StartDate   EndDate
1   abc     20160216    20160217
**1 abc     20160301    20160302
1   abc     20160301    20160303**

Answer 1

猜猜你我需要使用SELECT DISTINCT，它只搜索表格列中的唯一值。

这就是你要找的东西吗？我没有得到你想要的输出......

Answer 2

您应该能够连接StartDate和EndDate，并查找连接的值是不同的。

select id, StartDate, EndDate, distinct(contactDate) from (Select id, StartDate, EndDate, CONCAT_WS('', StartDate, EndDate) AS concatDate from Data)

修改

实际上我认为你可以在没有结束的情况下做到这一点......

Select id, StartDate, EndDate, distinct(StartDate, EndDate) from data

SQL：如何从给定的一组日期范围中找到唯一的日期范围？

2 个答案: