minDate
This function is used by Ignition's Expression language.
Description​
Finds and returns the minimum date in the given column of the given dataset, or the min value in a series of dates specified as arguments. When looking up the min date in a dataset, the column may be specified as an index or as a column name. Any null values in the column are ignored.
Syntax (index)​
minDate(dataset, columnIndex)
Parameters​
| Type | Parameter | Description |
|---|---|---|
| Dataset | dataset | The starting dataset to search. |
| Integer | columnIndex | The index of the column to search for the min date. Must be a column index of the provided dataset. |
Returns​
Date - The minimum date of the given date column in the given dataset.
Syntax (name)​
minDate(dataset, columnName)
Parameters​
| Type | Parameter | Description |
|---|---|---|
| Dataset | dataset | The starting dataset to search. |
| String | columnName | The name of the column to search for the min date. Must match a column name in the provided dataset. |
Returns​
Date - The minimum date of the given date column in the given dataset.
Syntax (date)​
minDate(date[, date])
Parameter​
| Type | Parameter | Description |
|---|---|---|
| Date | date | A date. Can be as many dates as needed. |
Returns​
Date - The minimum date of the given dates.
Examples​
Suppose you had a Table with this dataset in it.
| AlarmTime | Path | Severity |
|---|---|---|
| 2010-01-08 7:28:04 | Tanks/Tank5/TempHiAlarm | 4 |
| 2010-01-08 10:13:22 | Tanks/Tank38/LoLevel | 2 |
| 2010-01-08 13:02:56 | Valves/Valve2/ | 2 |
Code Snippet
minDate({Root Container.Table.data}, "AlarmTime") //You could use this expression to get the date and time for the oldest alarm