Update is used to modify the existing records in a table. You can use Where to filter records.

Sql

Update Table_Name;
Set
    column1 = value1,
    column2 = value2,
Where
    column3=some_value
and
    column4=some_another_value;

JsStore

var noOfRowsUpdated = await connection.update({ 
      in: "Table_Name",
    set: {
        column1: value1,
        column2: value2
    },
    where: {
        column3: some_value,
        column4: some_another_value
    }
});

alert(noOfRowsUpdated + ' rows updated');

Example