how to get no of transactions on an hourly range - sql

Question

Table has columns Receiptno: and [TransDate] and Transtime. eg: Data below
0080052594 2012-10-28 1899-12-30 19:01:38.000
0080052595 2012-10-28 1899-12-30 19:05:09.000
0080052596 2012-10-28 1899-12-30 19:05:15.000
I need query to get hourly interval and the no: of transactions in the below format
Hour Inetrval No: Trans
09:01-10:00 10
10:01-11:00 16

Answer 1

Which DBMS are you using? What specific data type are your fields?
In Access, you'd use a Totals query (GROUP BY in SQL), you could do it using an additional field (or layered queries). You could also use inline code string comparisons. This would work with string or DateTime fields for transaction date and time.
For example, TABLE1:
RECEIPTNO TRANSDATE TRANSTIME
1 1/12/2015 4:32:00 PM
2 1/12/2015 4:45:00 PM
3 1/12/2015 4:52:00 PM
4 1/12/2015 3:57:00 PM
5 1/12/2015 4:07:00 PM
6 1/12/2015 4:09:00 PM
7 1/12/2015 6:15:00 PM
8 1/12/2015 12:34:00 PM
9 1/12/2015 2:45:00 PM
10 1/12/2015 3:15:00 PM
11 1/12/2015 3:17:00 PM
12 1/12/2015 3:49:00 PM
13 1/12/2015 3:47:00 PM
14 1/12/2015 2:52:00 PM
15 1/12/2015 2:36:00 PM
16 1/12/2015 2:17:00 PM
17 1/12/2015 2:25:00 PM
18 1/12/2015 4:12:00 PM
QUERY1 to count by hour as string:
SELECT Count(TABLE1.RECEIPTNO) AS CountOfRECEIPTNO, TABLE1.TRANSDATE, Left([TRANSTIME],InStr([TRANSTIME],":")-1) AS [HOUR]
FROM TABLE1
GROUP BY TABLE1.TRANSDATE, Left([TRANSTIME],InStr([TRANSTIME],":")-1)
ORDER BY Left([TRANSTIME],InStr([TRANSTIME],":")-1);
Results:
CountOfRECEIPTNO TRANSDATE HOUR
1 1/12/2015 12
5 1/12/2015 2
5 1/12/2015 3
6 1/12/2015 4
1 1/12/2015 6