N/query Module
Query.and(conditions)
Method Description: Creates a new condition (a query.Condition object) that corresponds to a logical conjunction (AND) of the arguments passed to the method. The arguments must be one or more query.Condition objects. A condition narrows the query results. The query.Condition object acts in the same capacity as the search.Filter object in the N/search Module. The primary difference is that query.Condition objects can contain other query.Condition objects. To create conditions: Use Query.createCondition(options) to create conditions for the initial query definition created with query.create(options). Use Component.createCondition(options) to create conditions for the join relationships created with Query.autoJoin(options) and Component.autoJoin(options). If you have multiple conditions, use them to create a new parent condition with the methods Query.and(), Query.or(conditions), and Query.not(condition). Assign your parent condition to Query.condition. For an example, see Syntax.
Returns: query.Condition
Supported Script Types: Client and server scripts For more information, see SuiteScript 2.0 Script Types.
Governance: None
Module: N/query Module
Parent Object: query.Query
Sibling Object Members: Query Object Members
Since: 2018.1
Search NetSuite - https://system.netsuite.com/app/help/helpcenter.nl?search=Query.and(conditions)

// Code Example 1

// Add additional code

//...

var myCustomerQuery = query.create({

    type: query.Type.CUSTOMER

});



var mySalesRepJoin = myCustomerQuery.autoJoin({

    fieldId: 'salesrep'

});



var myLocationJoin = mySalesRepJoin.autoJoin({

    fieldId: 'location'

});



var firstCondition = myCustomerQuery.createCondition({

    fieldId: 'id',

    operator: query.Operator.EQUAL,

    values: 107

});

var secondCondition = myCustomerQuery.createCondition({

    fieldId: 'id',

    operator: query.Operator.EQUAL,

    values: 2647

});

var thirdCondition = mySalesRepJoin.createCondition({

    fieldId: 'email',

    operator: query.Operator.START_WITH_NOT,

    values: 'foo'

});



myCustomerQuery.condition = myCustomerQuery.and(

    thirdCondition, myCustomerQuery.not(

        myCustomerQuery.or(firstCondition, secondCondition)

    )

);



var resultSet = myCustomerQuery.run();

//...

// Add additional code



//SOURCE: https://system.netsuite.com/app/help/helpcenter.nl?fid=section_1510780422.html