Overview Recently, I practiced MongoDB queries using a sample Job Portal database. Instead of learning operators in isolation, I used a realistic Job Portal dataset to better understand how MongoDB queries work in real-world applications. Dataset Structure A sample jobs collection was created with fields such as: title company location salary experience skills applicants status department Example Document { title : " \" Software Engineer \" , " company : " TechCorp Bangladesh " , salary : 75000 , skills : [ " JavaScript " , " Node.js " , " MongoDB " ] } Enter fullscreen mode Exit fullscreen mode Topics Covered 1. Comparison Operators Used for filtering documents based on value comparison. Operators covered: $eq $ne $gt $gte $lt $lte Example: db . jobs . find ({ salary : { $gt : 70000 } }) Enter fullscreen mode Exit fullscreen mode 2. Logical Operators Combining multiple query conditions. Operators covered: $and $or $not $nor Example: db . jobs .…