sequelize.js - 如何计算列的值并按范围分组？

Question

如果我在表中有一个年龄列，我如何检索落入 5 个范围的值的计数？

我目前有一个查询，它只获取年龄不为空或未定义的用户数。

User.findAll({
     where: {
       age: {
         [Op.not]: null,
         [Op.notIn]: ['null', 'undefined']
       },
     },
     group: ['age', 'count'],
     attributes: [
            ['age', 'label'],
            [Sequelize.fn('count', Sequelize.col('user_id')), 'count']
          ],
        })

电流输出: {label: 28, count: 86}
想要的结果:

ages: {
 0-20: 5,
 20-40: 39,
 40-60:28,
 60-80:11,
 80-100:3
}

Answer 1

所以最后我为此使用了文字查询:

User.findAll({
          where: {
            age: {
              [Op.not]: null,
              [Op.notIn]: ['u', 'undefined', 'x', '']
            }
          },
          attributes: [
            [Sequelize.literal('COUNT (CASE WHEN age < 20 THEN age END)'), '<20'],
            [Sequelize.literal('COUNT (CASE WHEN age >= 20 AND age <= 29 THEN age END)'), '20-29'],
            [Sequelize.literal('COUNT (CASE WHEN age >= 30 AND age <= 39 THEN age END)'), '30-39'],
            [Sequelize.literal('COUNT (CASE WHEN age >= 40 AND age <= 49 THEN age END)'), '40-49'],
            [Sequelize.literal('COUNT (CASE WHEN age >= 50 THEN age END)'), '≥50'],
            [Sequelize.fn('count', Sequelize.col('user_id')), 'count']
          ]
        }),