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# ![$ifnull Graphic](https://lunarcrush.com/gi/w:26/t:$ifnull.png) $ifnull

MongoDB users are actively discussing aggregation and schema design. A recent post highlights practical applications of these concepts.

### About $ifnull
A topic related to MongoDB.  

### Engagements: X [#](/topic/$ifnull/interactions)
---
![Engagements Line Chart](https://lunarcrush.com/gi/w:600/t:$ifnull/c:line/m:interactions.svg)  
[Engagements 24-Hour Chart Data](/topic/$ifnull/time-series/interactions.tsv)  
**Current Value**: X  
**Daily Average**: XX  
**1-Year High**: XX on 2025-07-27  
**1-Year Low**: X on 2025-07-28  

| Social Network | X |
| -------------- | - |
| Engagements    | X |
  

  
  
### Mentions: X [#](/topic/$ifnull/posts_active)
---
![Mentions Line Chart](https://lunarcrush.com/gi/w:600/t:$ifnull/c:line/m:posts_active.svg)  
[Mentions 24-Hour Chart Data](/topic/$ifnull/time-series/posts_active.tsv)  
**Current Value**: X  
**Daily Average**: X  
**1-Year High**: X on 2025-07-25  
**1-Year Low**: X on 2025-07-25  

| Social Network | X |
| -------------- | - |
| Mentions       | X |
  

  
  
### Creators: X [#](/topic/$ifnull/contributors_active)
---
![Creators Line Chart](https://lunarcrush.com/gi/w:600/t:$ifnull/c:line/m:contributors_active.svg)  
[Creators 24-Hour Chart Data](/topic/$ifnull/time-series/contributors_active.tsv)  
X unique social accounts have posts mentioning $ifnull in the last XX hours which is no change from in the previous XX hours
**Daily Average**: X  
**1-Year High**: X on 2025-07-25  
**1-Year Low**: X on 2025-07-25  

**Top topics mentioned**
In the posts about $ifnull in the last XX hours

[embed](/topic/embed), [$match](/topic/$match), [$unwind](/topic/$unwind), [$project](/topic/$project)

### Top Social Posts [#](/topic/$ifnull/posts)
---
Top posts by engagements in the last XX hours

*Showing only X posts for non-authenticated requests. Use your API key in requests for full results.*

"MongoDB- Day XX Practiced $project $unwind and $ifNull in aggregation -Top X products by sales -User count by status - Filtered arrays with $unwind + $match Now diving into Schema Design -Embed vs Reference: when to use what #MongoDB #100DaysOfCode #BackendDev #LearnInPublic"  
[@nayanchellani](/creator/x/nayanchellani) on [X](/post/tweet/1948784453301530848) 2025-07-25 16:36:34 UTC XX followers, XX engagements