Beyond INNER JOIN, SQL also has LEFT, RIGHT, and FULL joins. These can bring in unmatched rows, letting you see what’s missing. LEFT JOIN retrieves all records from the left table and the matched records from the right table, while RIGHT JOIN does the opposite, fetching all records from the right table along with matched…
Tag: LEFT JOIN
Introduction to SQL Joins (INNER, LEFT, RIGHT, FULL)
Today I started with SQL joins, which let you pull data from multiple tables in a single query. So far, I’ve covered: 💡 Practical Example Idea: In a clinical setting, you could join a patient demographics table with a lab results table to see both in one view, could be useful for reviewing patient outcomes…