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Set expression example in qlikview

Set Analysis is a powerful set of syntax which is widely used in QlikView and Qlik Sense applications, but I find that many developers are unaware one of the most useful functions. Here I explain how to use it. Qlik developers have a lot of syntax to learn. Set Analysis is a subset of expression syntax that can cause some developers issues.

It is however very simple at heart. You can add a Set to an expression which changes the selection context for that expression — effectively forcing selections that only apply to that one expression. By nesting Set Analysis syntax, and using different operators, highly complex expressions can be built.

They are all however just expansions on the very simple concept of applying selections on a field. One of the problems with Set Analysis is that the results can be counter Intuitive to users. When Qlik products are explained to them, they are told that their selections effect everything. Set Analysis expressions, however, modify those selections. This change should always be clearly signposted to users with labels and legends.

For things like prior period comparison, Set Analysis is brilliant. Caution should be taken though not to confuse users. A common use case for Set Analysis is to tie a chart or an expression to a specific dimension value. This overrides the users selection. Another operator that can be used is Star Equals, this gives the intersection of what is specified in the Set and the users selection. You will note that Equals and Star Equals give identical results above. Look what happens though when we select a single Region:.

With Equals the users selection is totally ignored, but with Star Equals it is respected. For prior period comparison it may be that you want to ignore the users selection, so if they select only you still want to show as the comparative period. Generally though I think the Star Equals is the better approach. A similar approach can be applied on both sides of a comparison expression. This shows there are options around how you apply set analysis to your expressions, and you need to think carefully about what you apply.

Even in this simple example with a single field to be selected there is much to consider. The main reason, I think, that so few developers that I speak to know about this function is due to a bug in QlikView. For many versions the use of Star Equals gave a wiggly red line, indicating bad syntax. This would put off all but the most confident developer!

The syntax highlighting however is only a guide, and sometimes you just have to push on and ignore it. It does make the rest of the development of that expression more tricky, but there you go. Once you start using the correct expression syntax then many of the issues of apps being counter intuitive can go away, and users can feel there selections are not being ignored. There are many great resources for this already.

As well as covering all operators and modifiers including the slightly newer P and E functions it has a set of handy Venn Diagrams showing what is included when any operator is used. A quick Google search will also turn up a lot of results, including many on Qlik Community. Using this example you can see exactly what happens to each of the expressions when you apply different selections.Also, I will provide some useful examples for you to get your Hands On right away.

So, now you should be able to get up and running creating your set expressions. Qlik Set Analysis Cheat Sheet. While it is not free, it does offer a cost-friendly, guided way to learn QlikView and contains an entire chapter about Set Analysis. Subscribe to receive new posts like this one and updates right in your inbox I consent to be contacted via email for the purpose of new articles, updates and marketing.

Qlik Set Analysis Tutorial – Star Equals

I'm also the author of the Lean Data Processing online course, focused on building optimized data pipelines in QlikView and Qlik Sense. Thanks for this good info. One question: In part 5 you show how to use a variable. Could I use a label reference? Using a Label reference would be in an attempt to use different Sets for each row supposing it is a tablewhich is not possible.

Is it set analysis? What does it mean? This is a pretty basic idea of Dollar-Sign expansion, but it is a topic on its own, with its syntax rules and everything. You may be able to find something already on the Qlik Community about the subject, or on other blogs Check the blogroll on the sidebar.

I will also consider it for future writings here in iQlik. I would like the label to show whichever MonthYear is currently used in the set analysis. I have:. The information provided here is a tutorial that, if followed, will allow readers to learn about how QlikView works in various aspects.

set expression example in qlikview

Notify me of follow-up comments by email. Notify me of new posts by email. Previous Next. Follow these steps to build up your set expression and use the correct syntax: First of all, you need to define what you want your expression to return. A good method to get it right would be to answer the following questions first: What field will I use in my expression? How will I aggregate the field? It can be using Sum, Count, Avg, etc. What explicit selections do I need in my expression?

Here you define a Field and its value s. Another example would be to only include values associated with certain Year. If you want to Sum the Sales amount, you would start with something like: Sum Sales Then,wheneedtoaddtheSetportion of the expression. After the first curly bracket we add either a dollar sign which means the record set will be based on the current selections or a number 1 meaning we will use the full record set of all the records in the application.

Important to note is that the dollar sign can be ommited and the set expression will not be affected. It is good practice, however, to use it. After the Dollar Sign, we define the fields that will play in our set expressions.

If FieldValue is a literal or text, you should enclose it in single quotes. If you want to use a search string as the FieldValueenclose it in double quotes.

Notice that here we are using a search string. NEVER forget the equal sign here.

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Keep Posted. Any comments are welcome! Enter your email.A variable in Qlik Sense is a named entity, containing a data value. When a variable is used in an expression, it is substituted by its value or the variable's definition.

QlikView Set Analysis

The variable x contains the text string Sum Sales. It is not recommended to name a variable identically to a field or a function in Qlik Sense. But if you do, you must know how to use them in an expression. There are several ways to use variables with calculated values in Qlik Senseand the result depends on how you define it and how you call it in an expression. In the second variable, we add an equal sign before the expression. This will cause the variable to be calculated before it is expanded and the expression is evaluated.

If you use the vSales variable as it is, for example in a measure, the result will be the string Sum Salesthat is, no calculation is performed. This means that the result displayed is the total sum of Sales. Thanks for letting us know. Is there anything you'd like to tell us about this topic?

Can you tell us why it did not help you and how we can improve it? Search for topics and videos. QlikWorld online Free global virtual event for data integration and data analytic gurus QlikView On this page How names are interpreted Variable calculation.

Create Creating visualizations Data assets in visualizations Using expressions in visualizations Using variables in expressions Examples of using a variable in an expression.

Examples of using a variable in an expression A variable in Qlik Sense is a named entity, containing a data value. Tip: When using variables in expressions, you can change the expression used in a range of charts simultaneously simply by editing the variable. Did this information help you? Yes No.

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Send feedback.Keeping you updated with latest technology trends, Join DataFlair on Telegram. Here, we will open a new chapter called QlikView Functions. There are total 21 functions in QlikView. Along with this, we will study a list of QlikView Functions with their syntax and examples.

You can either apply these QlikView functions by typing them directly in the script editor where your script is loaded or you can select from an already fed list while creating a table box. Returns the number of numeric values found in 1 to N arguments.

set expression example in qlikview

Returns the numeric average of 1 to N arguments. If no numeric value is found, NULL is returned. Returns the lowest numeric value of 1 to N arguments. Returns the highest numeric value of 1 to N arguments.

Returns the factorial of a positive integer n. If the number n is not an integer it will be truncated. Non-positive numbers will return NULL. Returns the number of combinations of n2 items that can be picked from a group of n1 items. The order in which the items are selected is insignificant. Non-integer items will be truncated. How many combinations of 7 numbers can be picked from a total of 35 Lotto numbers?

Returns true if n is an even integer, false if n is an odd integer and NULL if n is not an integer. Returns true if n is an odd integer, false if n is an even integer and NULL if n is not an integer. Returns 1, 0 or -1 depending on whether x is a number, 0 or a negative number. Returns the number of set bits in i.Set Analysis is a scary subject.

set expression example in qlikview

I would surely claim it is the most difficult part of developing your QlikView front-end. I have waited to throw my hat in the ring regarding set analysis.

But the time has come for LivingQlik to cover Set Analysis. Firstly, no self-respecting blog would be complete without tackling the subject.

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Secondly, I feel that there is room for a compete reference presented in a clear voice. Can LivingQlik be that voice? This is the ultimate cheat sheet for Set Analysis in QlikView. It includes the syntax definitions and options, many examples and tons of tips and tricks to make the most out of this complex topic. It is a difficult subject for all skill levels, from newbie to experienced. I know I still run into situations that make me scratch my head and I have been doing this for a while.

When we use an expression with set analysis inside a chart, the chart will be calculated based on the data set within the expression rather than the green selected values and white associated values that would normally filter the chart. This line chart shows Quebec sales even when Quebec is not selected. Comparing points-in-time would be difficult without set analysis.

Here we look at a month vs the same month last year. Admittedly, the syntax for QlikView Set Analysis is not easy. Here, I will lay it out as plainly as possible. Where there are several options, I have attempted to highlight the more common use-cases. Set Analysis is always enclosed in curly braces and must exist within an aggregation like sumavgmaxminor onlyfor example. In fact, Set Analysis is the only place where curly brackets are utilized in Qlik syntax.

Sum up the sales for all data excluding the current selections limited to the Quebec Region. The syntax for Set Analysis is broken out kind of like grammar rules break out a sentence. An identifier is an optional prefix that determines the starting selection state of our set. Identifiers get applied to the modifiers they precede. Because developers are usually using the default state of the data model, developers often leave the dollar sign out since we are already in the default state.

If your object or sheet is responding to another state, and you actually want the expression to reference the default state, then the dollar-sign would be needed. Omitting the identifier just means we are responding to the state of the object or sheet following normal inheritance rules. Average of sales for all data in the application ignore all user selections. But be careful about omitting the identifier when working with other states.

Operators are used to join two identifier-modifier sets. Operators can also be used inside a modifier element more on this in the Element List section. There are only 4 variations.

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Operator Definition. Identifiers and operators can be used to create some very interesting sets that might or might not have value to you. I find that I use the intersection operator more often than any of the others, but in all reality, the sets I require generally do not require an operator. Sum of profit for all the data in the app excluding the current user selections. Sum of profit for last year but only for the period less than today one year ago.

This is profit LYTD. A modifier gives you a way to assign specific values to fields when determining your set. Here you will list field names, each followed by an equal sign and then an element list.The following expressions can be used in a single chart:. There is a problem with this method; the QlikView Developer must duplicate the selections list boxes and multi boxes for all three states so that the end-user can make appropriate selections for the various states.

QlikView - Expressions - AGGR Function with Max and FirstSortedValue function

This will allow the end user to set the context for the various charts and then make use of specific selections to show the differences between states. Set Analysis can be used with states to keep certain selections consistent between states. The QlikView Developer can add elements to the set modifiers as necessary in order to keep even more fields consistent between states.

The following expressions are valid and will count the distinct invoice numbers that are in either the default state or State1. Another way of using set operators is with the element functions P and E. These functions are only available within set expressions.

It is almost, but not quite equivalent to the following expression:. The difference between the expressions is that in the first one, the possible values on invoice number from State1 are passed into the default state. In the second expression, the selected values from State1 are passed into the default state. If the user has not made any invoice number selections in State1, no invoice number values will be passed into the default state.

Set operators are best used within set modifiers. The following expression finds the intersection of the possible invoice numbers from State1 and State2 and passes those values into the invoice numbers in the default state.

Any invoice selections currently existing in the default state are being overridden by the values from the intersection of the element functions. It should be noted that the above expression is still not completely correct as it fails to synchronize the common selections between the default state and State1. Below is an expression that will do so:. As before, the QlikView Developer can add fields into the modifier to keep selections consistent between various states.

Thanks for letting us know. Is there anything you'd like to tell us about this topic?

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Can you tell us why it did not help you and how we can improve it? Search for topics and videos. QlikWorld online Free global virtual event for data integration and data analytic gurus QlikView Adding context to our dashboard basically means that we have to provide a lot of insights, comparison with the relevant products and timeline. This will make our dashboard action-oriented. This can be achieved with the help of the Qlikview feature called the Set Analysis which helps in adding context to our dashboard.

Before we dig into the syntax of the set expression let us understand the major features of set analysis. It can contain the below-mentioned elements. Ideally, the logical sequence of set expression would start with an identifier and then comes the modifier and finally the operator.

Identifiers are the basic elements of a set expression is used for the identification of active set, it is the state of the data set and the set expression starts with the identifier as its first element. Operators perform the function by combining and manipulating our selected set. The operand for the operator will be the selected set and the result will also be a set.

The thumb rule for the evaluation of operators is from left to right. Qlikview uses these 4 as the basic operators.

set expression example in qlikview

The precedence of the evaluation of operators in Qlikview is that intersection and XOR operators are evaluated first and then union and exclusion operators are evaluated. Modifiers are used to make the necessary and specific alterations to the set of data that are selected, we can imagine modifier as a WHERE statement that we use in SQL. It uses many field names where each field name will have its own selection. Modifiers by default will consider the identifier as the currently selected set if we do not mention a separate identifier.

Let us try to understand it through an example:. The syntax for the set expression can be more complex as well based on what kind of data we need to filter and take.

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There are a variety of applications for set analysis in the market, for example, we can use them for the comparison of our most sold products vs. This is a guide to QlikView Set Analysis. You may also look at the following articles to learn more —. Your email address will not be published. Forgot Password? Popular Course in this category. Course Price View Course. Leave a Reply Cancel reply Your email address will not be published.

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