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> db.inventory.distinct(“dept”) //获取dept字段的不重复值 结果:[“A”,”B”] > db.inventory.distinct(“item.sku”)//获取item子字段sku的不重复值 结果:[“111”,”222”,”333”] >db.inventory.distinct(“sizes”)//获取数组格式字段的不重复值 结果:[“M”,”S”,”L”] >db.inventory...
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