Unique Operator

Overview

The Unique operator helps you remove duplicate values from your data set, leaving only distinct records. Doing so is especially useful when working with large data sources where repeated values can create confusion.

You'll find the Unique operator under the Table group to the left of the Data Workflow canvas.

About the Info Window

Here's a breakdown of each setting in the Info window:

Info
Category	Grayed out and non-adjustable setting indicating the operation type.
Label	Sets the label for your operator, displaying below the operator on your Data Workflow canvas. This field is optional, but set a label if you use more than one of the same operator type. A label helps you identify your operators without opening any Info windows.
Preserve Argument Type	When selected, this setting ensures the argument data type is respected when the operator executes.
Unique Keys	Tells the operator which data where to retrieve unique values. This key would be the name of the column of a data table. For example, if you have a column labeled country, you'd enter country here. Keys are case sensitive and must match the capitalization of your column labels.

Adding a Unique Operator

In this example, you'll configure a Data Table component that stores a list of countries. In the Data Table component, you'll include a couple of duplicate entries and set up a Data Workflow to remove the duplicate entries.

These instructions assume you have a new module open and saved with a title.

Configure the Data Table Component

First, configure a Data Table component to store the list of countries. For this example, ensure to include duplicate entries to demonstrate how the Unique operator removes them.

1.

In the Module Builder, drag and drop a Data Table component onto your canvas.

2.

In the Property ID A Property ID is the unique field ID used by Unqork to track and link components in your module. field, enter dtCountries.

3.

In the data table, enter the following:

4.

Click Save Component.

Configure the Hidden Component

Next, you'll configure a Hidden component to store the output from the Data Workflow.

1.

Drag and drop a Hidden component onto your canvas, placing it below your Data Table component.

2.

In the Property ID A Property ID is the unique field ID used by Unqork to track and link components in your module. and Label Text Label Text conveys what the input component is and what information it displays. Enter the purpose of the corresponding component or field. fields, enter uniqueCountries.

3.

Click Save Component.

Configure the Data Workflow Component

Configure a Data Workflow component to bring in the table data and remove the duplicate entries, returning only the distinct entries.

1.

Drag and drop a Data Workflow onto your canvas, placing it between the Data Table and Hidden components.

2.

In the Property ID A Property ID is the unique field ID used by Unqork to track and link components in your module. and Canvas Label Text Canvas Label Text indicates the purpose of the corresponding field or component. For non-input components, the Canvas Label Text isn't end-user facing, and only appears in the . fields, enter dwfUnique.

3.

Navigate to the Actions tab.

4.

Set the Trigger Type to Watch.

Configure the Input Operator

1.

Drag and drop an Input operator onto your Data Workflow canvas.

2.

Configure the operator's Info window as follows:

Configure the Unique Operator

1.

Drag and drop a Unique operator onto your Data Workflow canvas.

2.

Configure the operator's Info window as follows:

3.

Connect the output port (right) of the dtCountries Input operator to the input port (left) of the Show Unique Countries Only Unique operator.

Configure the Output Operator

1.

Drag and drop another Output operator onto your Data Workflow canvas.

2.

Configure the operator's Info window as follows:

3.

Connect the output port (left) of the Show Unique Countries Only Unique operator to the input port (left) of the uniqueCountries Output operator.

Configure the Console Operator

Lastly, add a Console operator as an output to the Unique operator so you can review the results in the DevTools Console The DevTools Console helps you securely store, build, test, and deploy your software..

1.

Drag and drop a Console operator onto your Data Workflow canvas.

2.

Configure the operator's Info window as follows:

3.

Connect the output port (left) of the Show Unique Countries Only Unique operator to the input port (left) of the Unique Countries Console operator.

4.

Click Save Component.

5.

Save your module.

Here's how the completed example looks in the Module Builder:

Preview your module in Express View Express View is how your end-user views your application. Express View also lets you preview your applications to test your configuration and view the styling. This is also the view your end-users will see when interacting with your application. After configuring a module, click Preview in the Module Builder to interact with the module in Express View. and open the DevTools Console The DevTools Console helps you securely store, build, test, and deploy your software.. You'll see the Hidden component holding a list of countries, but each country displays only once.

Overview

The Unique operator helps you remove duplicate values from your data set, leaving only distinct records. Doing so is especially useful when working with large data sources where repeated values can create confusion.

You'll find the Unique operator under the Table group to the left of the Data Workflow canvas.

About the Info Window

Here's a breakdown of each setting in the Info window:

Setting	Description
Category	Grayed out and non-adjustable setting indicating the operation type.
Label	Sets the label for your operator, displaying below the operator on your Data Workflow canvas. This field is optional, but set a label if you use more than one of the same operator type. A label helps you identify your operators without opening any Info windows.
Preserve Argument Type	When selected, this setting ensures the argument data type is respected when the operator executes.
Unique Keys	Tells the operator which data where to retrieve unique values. This key would be the name of the column of a data table. For example, if you have a column labeled country, you'd enter country here. Keys are case sensitive and must match the capitalization of your column labels.

Adding a Unique Operator

In this example, you'll configure a Data Table component that stores a list of countries. In the Data Table component, you'll include a couple of duplicate entries and set up a Data Workflow to remove the duplicate entries.

These instructions assume you have a new module open and saved with a title.

Configure the Data Table Component

First, configure a Data Table component to store the list of countries. For this example, ensure to include duplicate entries to demonstrate how the Unique operator removes them.

1.

In the Module Builder, drag and drop a Data Table component onto your canvas.

2.

In the Label Text Label Text conveys what the input component is and what information it displays. Enter the purpose of the corresponding component or field. and Property ID A Property ID is the unique field ID used by Unqork to track and link components in your module., enter dtCountries.

3.

In the data table, enter the following:

4.

Click Save & Close.

Configure the Hidden Component

Next, you'll configure a Hidden component to store the output from the Data Workflow.

1.

Drag and drop a Hidden component onto your canvas, placing it below your Data Table component.

2.

In the Property ID A Property ID is the unique field ID used by Unqork to track and link components in your module. and Canvas Label Text Canvas Label Text indicates the purpose of the corresponding field or component. For non-input components, the Canvas Label Text isn't end-user facing, and only appears in the . fields, enter uniqueCountries.

3.

Click Save & Close.

Configure the Data Workflow Component

Next, configure a Data Workflow component to remove the duplicate entries from the data table and return only the distinct entries.

1.

Drag and drop a Data Workflow onto your canvas, placing it between the Data Table and Hidden components.

2.

In the Canvas Label Text Canvas Label Text indicates the purpose of the corresponding field or component. For non-input components, the Canvas Label Text isn't end-user facing, and only appears in the . and Property ID A Property ID is the unique field ID used by Unqork to track and link components in your module. fields, enter dwfUnique.

3.

Navigate to the Actions tab.

4.

Set the Trigger Type to Watch.

Configure the Input Operator

1.

Drag and drop an Input operator onto your Data Workflow canvas.

2.

Configure the operator's Info window as follows:

Configure the Unique Operator

1.

Drag and drop a Unique operator onto your Data Workflow canvas.

2.

Configure the operator's Info window as follows:

3.

Connect the output port (right) of the dtCountries Input operator to the input port (left) of the Show Unique Countries OnlyUnique operator.

Configure the Output Operator

1.

Drag and drop another Output operator onto your Data Workflow canvas.

2.

Configure the operator's Info window as follows:

3.

Connect the output port (left) of the Show Unique Countries Only Unique operator to the input port (left) of the uniqueCountries Output operator.

Configure the Console Operator

Lastly, add a Console operator as an output to the Unique operator so you can review the results in the DevTools Console The DevTools Console helps you securely store, build, test, and deploy your software..

1.

Drag and drop a Console operator onto your Data Workflow canvas.

2.

Configure the operator's Info window as follows:

3.

Connect the output port (left) of the Show Unique Countries Only Unique operator to the input port (left) of the Unique Countries Console operator.

4.

Click Save.

Here's how the completed Data Workflow looks:

5.

Save your module.

Below is the completed configuration in the Module Builder:

Preview your module in Express View Express View is how your end-user views your application. Express View also lets you preview your applications to test your configuration and view the styling. This is also the view your end-users will see when interacting with your application. After configuring a module, click Preview in the Module Builder to interact with the module in Express View. and open the DevTools Console The DevTools Console helps you securely store, build, test, and deploy your software.. You'll see the Hidden component storing a list of countries, but each country displays only once.