Waƙaƙen sanin aggregation da MongoDB ta bayar?

Question

Accepted Answer

Bayan matakan asali, framework ɗin aggregation na MongoDB yana bayar da ƙarfin sanin - `$facet` (tubalan da yawa a lokaci gida), `$bucket` (haɗa a cikin kewayon), window functions (`$setWindowFields`), `$graphLookup` (ƈawalwale/dumariya tambayoyi), da ƙari - don ingancin ƙididdige-shanye da sarrafa bayani.

## $facet — tubalan da yawa a cikin tambaya ɗaya

```js
// run MULTIPLE aggregations on the same data in one pass
db.products.aggregate([
  { $facet: {
      byCategory: [{ $group: { _id: "$category", count: { $sum: 1 } } }],
      priceStats: [{ $group: { _id: null, avg: { $avg: "$price" } } }],
      topRated:   [{ $sort: { rating: -1 } }, { $limit: 5 }]
  }}
]);
// → one query returns all three results (great for dashboards/faceted search)
```

`$facet` yana ƙididdige aggregations da yawa a wata ɗari gida — kira-kira don dashboard da dumariya-dumariya billatawa (misali ɓori ɓugaje + sakamakon + ƙididdige a jiya).

## $bucket / $bucketAuto — haɗa a cikin kewayon

```js
// group documents into buckets by ranges (like a histogram)
db.products.aggregate([
  { $bucket: {
      groupBy: "$price",
      boundaries: [0, 50, 100, 500, 1000],   // price ranges
      default: "1000+",
      output: { count: { $sum: 1 } }
  }}
]);
```

## Window functions ($setWindowFields)

```js
// running totals, moving averages, rankings (like SQL window functions)
db.sales.aggregate([
  { $setWindowFields: {
      partitionBy: "$region",
      sortBy: { date: 1 },
      output: { runningTotal: { $sum: "$amount", window: { documents: ["unbounded", "current"] } } }
  }}
]);
```

`$setWindowFields` yana ba da ƙarfin window-function (ƙididdige-mai-gudna, motsutsinya-mai-motsa, gradi) — ƙaƙƙofar MongoDB na SQL window functions.

## $graphLookup — ƈawalwale-mai-dumariya/dumariya-tabataka

```js
// traverse hierarchical/graph relationships (e.g. an org chart, category tree)
db.employees.aggregate([
  { $graphLookup: {
      from: "employees", startWith: "$reportsTo",
      connectFromField: "reportsTo", connectToField: "_id",
      as: "managementChain"
  }}
]);
```

`$graphLookup` yana ƈawalwale alaka a taɓantacce - don jerin-hira da bayani mai-zane (kama ƈawalwale-mai-dumariya SQL).

## Mee ya dace

Sanin ƙarfin sanin aggregation na MongoDB yana da mahimmanci-sani mai mataki-sama don **ƙididdige-shanye kuma sarrafa bayani mai takaici**, gina-kan matakan aggregation asali.
"),saannan matakan asali suke bada-hannu ƙididdige-shanye na gida, ƙarfin sanin mai-bayani yana ba da ƙarfin haɗi wanda jiya akwai: **`$facet`** (aiki aggregations da yawa a wata ɗari gida — kira-kira don dashboards da dumariya-dumariya billatawa, inda kuna buƙatar ƈoƈƙoƈƙobi ƈoƈƙoƈƙobi, sakamakon, da ƙididdige a cikin sai-da-sai jiya, buƙatun gida na gaske), **`$bucket`/`$bucketAuto`** (haɗa a cikin kewayon/histograms — aiki don raba-raba da ƙididdige-shanye), **window functions (`$setWindowFields`)** (ƙididdige-mai-gudna, motsutsinya-mai-motsa, gradi — ƙaƙƙofar MongoDB na SQL window functions, ba da ƙarfin lokaci-jerin-kashi da ƙaita-ƙaita ƙididdige wanda tsaure grouping ba ya iya), da **`$graphLookup`** (ƈawalwale-mai-dumariya na jerin-hira/dumariya alaka — kama org charts ko zumar-hira, kama ƈawalwale-mai-dumariya SQL).

Waɗannan ƙarfin yana ba da MongoDB damar tunka ingancin ƙididdige-shanye da sarrafa bayani wanda ba da wata haka ya cancaci buƙatan koyi bayani a cikin app code ko rabe-rabe analytics system.

Sanin su ya nuna ƙarfin MongoDB mai mataki-sama da yana ba da damar amfani da framework ɗin aggregation don buƙatan inganci (dashboards, dumariya-dumariya billatawa, lokaci-jerin-kashi analytics, bayani mai-jerin) kai-tsaye a cikin bayani.

Tun da ingancin ƙididdige-shanye da sarrafa bayani yana da mahimmanci-aiki na MongoDB, da tun da ƙarfin sanin mai-bayani aggregation ($facet, $bucket, window functions, $graphLookup) yana ba da ƙarfin haɗi, efficient hanyoyi don tunka ingancin buƙatan ($facet dashboards, raba-raba, ƙididdige mai-gudna, dumariya-tabataka), sanin aggregation mai-bayani yana da mahimmanci-sani mai mataki-sama wanda ya ɗaga MongoDB amfani daga ƙididdige asali zuwa ƙarfin-kai analytics, sigiya na ƙarfin MongoDB da jiya daidai da tumaki mai takaici da aiki-gida akwai buƙatun ƙididdige-shanye inganci kai-tsaye a MongoDB.