Is there any way to define more than 1 SOQL quires in a batchable class start method in Salesforce?

Hi Deepak,

if you are want to query the same object type but with multiple different WHERE selection clauses, and you then want to just apply the same logic to them, this is a simple matter of appropriately parenthesizing and combining the clauses into a single WHERE.

For example, if your first query is looking for instances matching:

A__c = '123' AND B__c = 'xyz'

while your second query is looking for instance matching:

A__c = '987' AND (B__c = 'abc' OR C__c = 999)
then you can construct your query as:

SELECT Id, ... FROM MyObject__c WHERE
(A__c = '123' AND B__c = 'xyz') OR
(A__c = '987' AND (B__c = 'abc' OR C__c = 999))