Built-in Functions → toDate with ago
toDate() with ago() is a combined time series analytic function that first calculates the ago() function value, which is the aggregated value of a measure from a specified start date (e.g. 10/01/2021) back to a specified period of time, such as a month, quarter, or year ago (e.g. a quarter ago, 07/01/2021), and then calculates the toDate function value, which is the aggregated value from the previously specified start date (e.g. 10/01/2021) to a specified period of time, such as a month, quarter, or year later (e.g. a month later, 11/01/2021). The output of the toDate() with ago() function is the summation of the aggregated values (e.g. from 07/01/2021 till 11/01/2021).
You can add the toDate() with ago() formula column to the Measure tray only.
Signature
ago( toDate( date exp, string datePart), int rollBack, string datePart )
The following table illustrates the combined toDate() with ago() function parameters:
| Parameter | Description | 
|---|---|
| date exp | A column of type Date or a formula that outputs date | 
| int rollBack | The integer value to roll back from datePart. A negative value adds up to datePart. For example, if the value of string datePart is "MONTH", then the value of int rollBack can be as follows: ● 1 representing the last month ● -1 representing the next month | 
| string datePart | The string datePart is a time dimension. The options are: ● "MONTH" ● "QUARTER" ● `"YEAR"  | 
Returns
double, date, or timestamp 
Example
Consider a scenario where you want to calculate the accumulated sales revenue of a year and the year before. In this case, you must use an aggregation function, toDate () function, and an ago() function to perform your calculation.
sum(SALES.SALES.AMOUNT_SOLD,ago(toDate(SALES.SALES.TIME_ID,"Year"),1,"Year"))
Use the following steps for detailed instructions on how to use the todate() with ago() combined time series function to tackle the above example in an insight:
In the Cluster Management Console (CMC), you can create a tenant that includes Sample Data. The Sample Data includes the SALES schema.
- In the Navigation bar, select the Content tab, and then select + New → Add Dashboard.
 - In the Add Dashboard dialog, for Name, enter Product Dashboard, and then select Add.
 - In the Action bar, select + (add icon), or select + Add Insight.
 - In the Insight panel, select Listing Table or V.
 - In Tables, select Aggregated Table.
 - In the Data panel, select Manage Dataset.
 - In the Manage Data Sets panel, in Tables, select SALES. Close the panel.
 - From the Data panel, drag and drop the following columns from the SALES table to the respective tray:
- Sales Date to the Grouping Dimension tray
- In the Properties panel, for Date Part, select Year.
 
 - Revenue to the Measure tray
- In the Properties panel, for Number Format, select Dollar Rounded.
 
 
 - Sales Date to the Grouping Dimension tray
 - From the Data panel, drag and drop Add Formula to the Measure tray.
 - The Formula Builder automatically opens:
- In Search Functions, select the down arrow, and then select Aggregation Functions.
 - Double-click the second sum function, 
sum(double[] exp), to add the formula to the editor. - In the Formula Editor,
- Replace 
double[] exp, ...with Revenue from the Data panel, and then add a comma. - In Search Functions, select the down arrow, and then select Analytic Functions.
 - Double-click the ago function, 
ago(date exp, int rollBack, string datePart).
In the Formula Editor,- Replace 
date expwith toDate,toDate(date exp, string datePart, from the Functions panel - Edit the toDate formula
- Replace 
date expwith Sales Date from the Data panel - Replace 
string datePartwith"Year" 
 - Replace 
 - Replace 
int rollBackwith1 - Replace 
string datePartwith"Year" 
 - Replace 
 
 - Replace 
 
 
sum(SALES.SALES.AMOUNT_SOLD, ago(toDate(SALES.SALES.TIME_ID,"Year"),1, "Year")
- Select Validate & Save.
 - In the New Formula Properties panel, 
- For Column Label, enter Yago with YTD.
 - For Number Format, select Dollar Rounded.
 
 - Name the insight Revenue: Year ago with year toDate.
 - In the Action bar, select Save.
 
