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Write Smarter Queries: SQL Basics Developers Overlook
Learn the essential SQL queries that go beyond the basics and make your data work more powerful.
New at hackr.io
This week we’re focusing on SQL skills every developer should know. These are the queries you’ll use in real projects, and knowing them well can set you apart in job interviews and on the job.
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The Scoop
Top 3 SQL Queries Developers Overlook
Joins Done Right
INNER JOIN, LEFT JOIN, and RIGHT JOIN are more than theory. They let you combine data across tables efficiently, and the way you use them can completely change results. You can also use JOIN in Google Sheets.
GROUP BY with Aggregate Functions
COUNT, SUM, AVG, and MAX turn raw data into insights. Used with GROUP BY, these queries can answer business questions directly from the database. Note that these also work in Excel and Google Sheets.
Subqueries and CTEs
Subqueries and Common Table Expressions keep code clean, make it easier to debug, and let you handle complex logic without creating a mess of nested queries.
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Skills
What Else Should You Know?
To really stand out, focus on:
Indexes for faster queries on large datasets
Window Functions like ROW_NUMBER, RANK, and PARTITION
Stored Procedures and Views for reusable logic
Transaction Control with COMMIT and ROLLBACK
Performance tuning using EXPLAIN plans
SQL is the backbone of so many apps and services. Developers who can write smarter queries will always have an edge.
That’s it for today.
Thanks for being part of the community at Hackr.io. Keep learning. Keep sharing your projects. And keep developing new skills.
The Hackr.io Team
P.S.
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