Determines whether the value of an expression is equal to any of several values in a specified list.
expr [Not] In(value1, value2, . . .)
The In operator syntax has these parts:
Expression identifying the field that contains the data you want to evaluate.
Expression or list of expressions against which you want to evaluate expr.
If expr is found in the list of values, the In operator returns True; otherwise, it returns False. You can include the Not logical operator to evaluate the opposite condition (that is, whether expr is not in the list of values).
For example, you can use In to determine which orders are shipped to a set of specified regions:
WHERE ShipRegion In (‘Avon’,’Glos’,’Som’);