Question

表IFCD结构如下：

tdate       ttime     updatemillisec
20140730    093014    500
...

如何将列合并到一个名为tdatetime的列，如yyyy-mm-dd hh：mm：ss.mmm格式？

我的回答：

SELECT CAST(LEFT(tdate, 4)+'-'+substring(tdate, 5, 2)+'-'+RIGHT(tdate, 2)+' '+ 
            LEFT(ttime, 2)+':'+substring(ttime, 3, 2)+':'+RIGHT(ttime, 2)+'.'+ 
            CAST(updatemillisec AS varchar) AS DateTime)

Answer 1

DECLARE @T TABLE (tdate VARCHAR(10)
    ,ttime VARCHAR(10)
    ,Updatemillisec VARCHAR(10))

INSERT INTO @T
VALUES ('20140730','093014','500')

SELECT CONVERT(VARCHAR(25), LEFT(tdate, 4) + '-' + 
                            SUBSTRING(tdate, 5, 2) + '-' + 
                            RIGHT(tdate, 2) + SPACE(1) + 
                            LEFT(ttime, 2) + ':' + 
                            SUBSTRING(ttime, 2, 2) + ':' + 
                            RIGHT(ttime, 2) + '.' + 
                            Updatemillisec, 109)
FROM @T

Answer 2

请试试这个。您必须连接时间并更新millisec并使其达到此格式hh:mm:ss.MMM。一旦采用该格式，以YYYYMMDD hh:mm:ss.MMM

格式连接日期和时间

DECLARE @Table TABLE (tdate VARCHAR(10),
                  ttime VARCHAR(10),
                  updatemillisec VARCHAR(10))
INSERT INTO @Table
VALUES('20140730', '093014', '500')

SELECT CAST(
          ( tdate + ' ' 
          + LEFT(ttime, 2) + ':' 
          + SUBSTRING(ttime, 3, 2) + ':' 
          + RIGHT(ttime, 2) + '.' 
          + updatemillisec) AS DATETIME
         ) AS tDateTime
FROM @Table

将yyyymmdd，hhmmss和sss列合并到datetime

2 个答案: