How Can we use set<id> to limit the number of records returned by a soql query in Salesforce?

Hii Anuj,

LIMIT. LIMIT is an optional clause that can be added to a SELECT statement of aSOQL query to specify the maximum number of rows to return. This query returns the first 125 Account records whose Industry is Media . You can use LIMIT with count() as the fieldList to count up to the maximum specified.