Here's your ultimate Excel Cheat Sheet tailored for Data Analysts. Save it, share it, and boost your productivity!
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Here’s a practical, code-first playbook for exploring numerical data 👇
How we approach EDA (with Python code + outputs):
- Basics: shape, dtypes, and missing values.
- Denoscriptives: mean/median, variance, and percentiles for quick sanity checks.
- Distributions: histograms, boxplots, density to spot skew and spread.
- Relationships: scatter plots and a correlation heatmap to find signals.
- Outliers: z-scores/IQR to flag anomalies worth investigating.
- Scaling: MinMax vs Z-score depending on the model and metric.
- Segments: groupby comparisons to surface patterns you miss in globals.
- Decisions: tie insights back to the question and next steps.
What this really means is: you get a repeatable workflow that turns raw numbers into clear hypotheses fast.
How we approach EDA (with Python code + outputs):
- Basics: shape, dtypes, and missing values.
- Denoscriptives: mean/median, variance, and percentiles for quick sanity checks.
- Distributions: histograms, boxplots, density to spot skew and spread.
- Relationships: scatter plots and a correlation heatmap to find signals.
- Outliers: z-scores/IQR to flag anomalies worth investigating.
- Scaling: MinMax vs Z-score depending on the model and metric.
- Segments: groupby comparisons to surface patterns you miss in globals.
- Decisions: tie insights back to the question and next steps.
What this really means is: you get a repeatable workflow that turns raw numbers into clear hypotheses fast.
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Ex_Files_Learning_Apache_Airflow.zip
88 KB
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📊 9 Key Database Types
🌍 Spatial: Stores and queries location data (PostGIS, MongoDB Spatial).
🔗 Blockchain: Secure, immutable ledgers (BigchainDB, IBM Blockchain).
🌐 Distributed: Scales across servers (Cassandra, Amazon DynamoDB).
⚡️ In-Memory: Lightning-fast access (Redis, Memcached, H2).
🗂 NoSQL: Flexible, schema-free (MongoDB, Couchbase, HBase).
📋 Relational: Structured with tables & SQL (MySQL, PostgreSQL, Oracle).
🧩 Object-Oriented: Models complex objects (db4o, Object DB).
🕸 Graph: Perfect for relationships (Neo4j, Amazon Neptune).
⏱️ Time-Series: Optimized for timestamps (InfluxDB, Prometheus).
Pick the right tool for your data challenge.
🌍 Spatial: Stores and queries location data (PostGIS, MongoDB Spatial).
🔗 Blockchain: Secure, immutable ledgers (BigchainDB, IBM Blockchain).
🌐 Distributed: Scales across servers (Cassandra, Amazon DynamoDB).
⚡️ In-Memory: Lightning-fast access (Redis, Memcached, H2).
🗂 NoSQL: Flexible, schema-free (MongoDB, Couchbase, HBase).
📋 Relational: Structured with tables & SQL (MySQL, PostgreSQL, Oracle).
🧩 Object-Oriented: Models complex objects (db4o, Object DB).
🕸 Graph: Perfect for relationships (Neo4j, Amazon Neptune).
⏱️ Time-Series: Optimized for timestamps (InfluxDB, Prometheus).
Pick the right tool for your data challenge.
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PostgreSQL is a powerful and versatile open-source relational database management system. It offers advanced features, such as support for complex data types, robust concurrency control, and extensive query optimization. With its scalability, reliability, and flexibility, PostgreSQL is an excellent choice for managing and organizing your data efficiently.
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