Interval match

qlikview979 — Thu, 25 Jun 2015 17:30:45 GMT

Hi experts,

What is interval match ? explain with example?

Re: Interval match

maxgro — Thu, 25 Jun 2015 17:58:14 GMT

- just use the search function (upper right)

https://community.qlik.com/search.jspa?q=interval&type=post

you get a lot of interesting answers

above all

IntervalMatch

- another resource is the QlikView help

IntervalMatch

The IntervalMatch prefix is used to create a table matching discrete numeric values to one or more numeric intervals.

It must be placed before a Load or Select (SQL)statement that loads the intervals. The field containing the discrete data points (Time in the example below) must already have been loaded into QlikView before the statement with the IntervalMatch prefix. The prefix does not by itself read this field from the database table. The prefix transforms the loaded table of intervals to a table that contains an additional column: the discrete numeric data points. It also expands the number of records so that the new table has one record per possible combination of discrete data point and interval.

The intervals may be overlapping and the discrete values will be linked to all matching intervals.

The general syntax is:

intervalmatch (matchfield) (loadstatement | selectstatement )

matchfield is the field containing the discrete numeric values to be linked to intervals.

loadstatement or selectstatement must result in a two-column table, where the first field contains the lower limit of each interval and the second field contains the upper limit of each interval. The intervals are always closed, i.e. the end points are included in the interval. Non-numeric limits render the interval to be disregarded (undefined).

There is also an extended syntax of IntervalMatch including one or several additional key fields. See IntervalMatch (Extended Syntax).

Example:

In the two tables below, the first one defines the start and end times for the production of different orders. The second one lists a number of discrete events. By means of the IntervalMatch prefix it is possible to logically connect the two tables in order to find out e.g. which orders were affected by disturbances and which orders were processed by which shifts.

OrderLog
Start	End	Order
01:00	03:35	A
02:30	07:58	B
03:04	10:27	C
07:23	11:43	D

EventLog
Time	Event	Comment
00:00	0	Start of shift 1
01:18	1	Line stop
02:23	2	Line restart 50%
04:15	3	Line speed 100%
08:00	4	Start of shift 2
11:43	5	End of production

First load the two tables as usual, then link the field Time to the time intervals defined by the fields Start and End:

OrderLog:

LOAD * INLINE [

Start, End, Order

01:00, 03:35, A

02:30, 07:58, B

03:04, 10:27, C

07:23, 11:43, D

];

EventLog:

LOAD * INLINE [

Time, Event, Comment

00:00, 0, Start of shift 1

01:18, 1, Line stop

02:23, 2, Line restart 50%

04:15, 3, Line speed 100%

08:00, 4, Start of shift 2

11:43, 5, End of production

];

IntervalMatch (Time) LOAD Start, End Resident OrderLog;

The following table box can now be created in QlikView:

Tablebox
Time	Event	Comment	Order	Start	End
00:00	0	Start of shift 1	-	-	-
01:18	1	Line stop	A	01:00	03:35
02:23	2	Line restart 50%	A	01:00	03:35
04:15	3	Line speed 100%	B	02:30	07:58
04:15	3	Line speed 100%	C	03:04	10:27
08:00	4	Start of shift 2	C	03:04	10:27
08:00	4	Start of shift 2	D	07:23	11:43
11:43	5	End of production	D	07:23	11:43

Back to Script Statements and Keywords.

QlikView 11.20 SR10

topic Interval match in QlikView

Interval match

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IntervalMatch

Re: Interval match