docs: add Comparison Sub-Operators

packages/noco-docs/content/en/developer-resources/rest-apis.md

@@ -221,11 +221,42 @@ Currently, the default value for {orgs} is <b>noco</b>. Users will be able to ch
 | btw | between | (colName,btw,val1,val2) |
 | nbtw | not between | (colName,nbtw,val1,val2) |
 | like | like | (colName,like,%name) |
+| isWithin | is Within (Available in `Date` and `DateTime` only) | (colName,isWithin,sub_op) |
 | allof | includes all of | (colName,allof,val1,val2,...) |
 | anyof | includes any of | (colName,anyof,val1,val2,...) |
 | nallof | does not include all of (includes none or some, but not all of) | (colName,nallof,val1,val2,...) |
 | nanyof | does not include any of (includes none of) | (colName,nanyof,val1,val2,...) |
 
+## Comparison Sub-Operators
+
+The following sub-operators are available in `Date` and `DateTime` columns.
+
+| Operation       | Meaning                 | Example                           |
+|-----------------|-------------------------|-----------------------------------|
+| today           | today                   | (colName,eq,today)                |
+| tomorrow        | tomorrow                | (colName,eq,tomorrow)             |
+| yesterday       | yesterday               | (colName,eq,yesterday)            |
+| oneWeekAgo      | one week ago            | (colName,eq,oneWeekAgo)           |
+| oneWeekFromNow  | one week from now       | (colName,eq,oneWeekFromNow)       |
+| oneMonthAgo     | one month ago           | (colName,eq,oneMonthAgo)          |
+| oneMonthFromNow | one month from now      | (colName,eq,oneMonthFromNow)      |
+| daysAgo         | number of days ago      | (colName,eq,daysAgo,10)           |
+| daysFromNow     | number of days from now | (colName,eq,daysFromNow,10)       |
+| exactDate       | exact date              | (colName,eq,exactDate,2022-02-02) |
+
+For `isWithin` in `Date` and `DateTime` columns, the different set of sub-operators are used.
+
+| Operation        | Meaning                 | Example                                 |
+|------------------|-------------------------|-----------------------------------------|
+| pastWeek         | the past week           | (colName,isWithin,pastWeek)             |
+| pastMonth        | the past month          | (colName,isWithin,pastMonth)            |
+| pastYear         | the past year           | (colName,isWithin,pastYear)             |
+| nextWeek         | the next week           | (colName,isWithin,nextWeek)             |
+| nextMonth        | the next month          | (colName,isWithin,nextMonth)            |
+| nextYear         | the next year           | (colName,isWithin,nextYear)             |
+| nextNumberOfDays | the next number of days | (colName,isWithin,nextNumberOfDays,10)  |
+| pastNumberOfDays | the past number of days | (colName,isWithin,pastNumberOfDays,10)  |
+
 ## Logical Operators
 
 | Operation | Example |