I have a CSV file with 51 columns.
In this order, there is a UID Column, Serial Column, Date column and 48 columns for each 30 minute segment of the day (from 00:30 through to 00:00). Each day has a new row.
So it looks like:
UID | Serial | Date | Val_0030 | Val_0100 | Val_0130 | ..... | Val_0000
123 | 123456 | 2016-01-02 | 56.2 | 23.25 | 32.8 | ..... | 86.23
UID | Serial | 2016-01-02 00:30 | Value
I would use
UNPIVOT and then cut up the column name
Val_0130 to add to datetime to get the desired result. This way you will only have to write the 48 columns in one spot.
here is some test data:
DECLARE @Table AS TABLE (UID INT, Serial INT, Date DATETIME, Val_0030 MONEY, Val_0100 MONEY, Val_0130 MONEY, Val_0000 MONEY) INSERT INTO @Table (UID, Serial, Date, Val_0030, Val_0100, Val_0130, Val_0000) VALUES (123, 123456, '2016-01-02',56.2,23.25,12.34,86.23) ,(231, 234561, '2016-01-05',26.2,13.25,23.45,106.23) ,(312, 345612, '2016-01-07',76.2,3.25,34.56,1010.56)
And the Query
SELECT UID ,Serial ,DateWithTime = [Date] + CAST((SUBSTRING(ColumnNames,5,2) + ':' + RIGHT(ColumnNames,2)) AS DATETIME) ,Value FROM @Table t UNPIVOT ( Value FOR ColumnNames IN (Val_0030, VAL_0100, Val_0130, VAL_0000) ) u
And if you don't want to type out all 48 columns, like I wouldn't want to, just run this query and copy and past the result into the
ColumnNames IN () section of the above query.
DECLARE @ColString VARCHAR(MAX) = '' DECLARE @DT DATETIME = '00:00' WHILE @DT < '1900-01-02 00:00:00.000' BEGIN IF LEN(@ColString) > 0 BEGIN SET @ColString += ',' END SET @ColString += 'Val_' + FORMAT(@DT,'HHmm') SET @DT = DATEADD(MINUTE,30,@DT) END SELECT @ColString