text: 
  'use strict';
  
  exports.up = function(knex, Promise) {
    return knex.schema.createTable('concerts', function (table) {
      table.increments();
      table.string('name').notNullable().defaultTo('');
      table.decimal('price').notNullable().defaultTo(1.00);
      table.timestamp('started_at').defaultTo(knex.fn.now());
      table.timestamp('ended_at').defaultTo(knex.fn.now());
    });
  };
  
  exports.down = function(knex, Promise) {
    return knex.schema.dropTable('concerts');
  };
  