In KDB, what steps do I need to take to extract a date range from a select/update/delete statement that is working effectively?

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Assuming you have a working select/update/delete statement with a date field, the following steps can be taken to extract a date range:

1. Determine the name of the date field in the table.
2. Specify the start and end dates of the desired date range.
3. For a select statement, modify the where clause to filter on the desired date range using the date field. For example:

select from myTable where dateField >= startDate, dateField <= endDate

1. For an update statement, modify the where clause to update only rows within the desired date range using the date field. For example:

update myTable set someColumn = someValue where dateField >= startDate, dateField <= endDate

1. For a delete statement, modify the where clause to delete only rows within the desired date range using the date field. For example:

delete from myTable where dateField >= startDate, dateField <= endDate