SQL
Subqueries and Joins in SQL
Master SQL with our guide on subqueries and joins! Learn to streamline data retrieval and enhance query efficiency today.
SQL
SQL
Types of data validation
Discover the six types of data validation to enhance data integrity and ensure accurate analysis. Master these techniques for better datasets!
SQL
Use subqueries to aggregate data {SQL}
WarehouseWarehouse.csv484 Bytesdownload-circleOrdersOrders.csv352 KBdownload-circle HAVING function Allows you to add a filter to your query instead of the underlying table that can only be used with aggregate functions CASE function Returns records with your conditions by allowing you to include if/then statements in your query Aliasing When you
SQL
Use subqueries to refine data {SQL}
Master SQL subqueries to refine your data analysis on New York Citi Bikes and support sustainable urban transport initiatives.
Data aggregation
Explore how SQL JOINs work
Master SQL JOINs with our guide! Learn how to connect tables effectively and enhance your database skills for better data management.
SQL
Manually cleaning data
Master manual data cleaning with proven strategies! Learn how to verify accuracy and build trust in your data analysis process.