Most asked SQL Joins Interview Questions and Answers Google BigQuery Joins Interview Questions

Most asked SQL Joins Interview Questions and Answers Google BigQuery Joins Interview Questions



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Title: ACE Your SQL Interview: All 5 JOIN Types Explained (Inner, Left, Right, Full, Cross)

Description: Struggling with SQL JOINs? 🤔 You're not alone! SQL JOINs are fundamental to data analysis and development, making them the MOST ASKED questions in any data-related interview!

This video demystifies INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL OUTER JOIN, and CROSS JOIN using a straightforward visual example with "Table A" and "Table B" (just like in the thumbnail!). We'll walk through exactly what each join does, how it combines data, and what the final result looks like, even with duplicate IDs.

Whether you're preparing for a Data Analyst, Data Scientist, or SQL Developer interview, or just looking to solidify your SQL fundamentals, this tutorial will give you the clarity and confidence you need to explain joins like a pro.

In this video, you will discover:

The core logic behind INNER JOINs and how they find common ground.

Why LEFT JOINs are indispensable for keeping all records from one table.

How RIGHT JOINs ensure all data from the right table is preserved.

When to use FULL OUTER JOIN for a complete picture (including non-matches).

The powerful (and sometimes dangerous!) CROSS JOIN for all combinations.

Special focus on the "INNER vs. LEFT JOIN" interview question – with clear examples!

Don't let SQL JOINs be your weak point. Watch now and master the essentials!



CREATE SCHEMA `vishnu588-tf.my_new_dataset_one`
OPTIONS (
location = 'US', -- Specify your desired location (e.g., 'EU', 'us-east1')
description = 'My BigQuery Dataset for new tables'
);



CREATE TABLE `vishnu588-tf.my_new_dataset.my_new_table2` (
-- Primary Key ID Column
id INT64 NOT NULL,
);

INSERT INTO `vishnu588-tf.my_new_dataset.my_new_table2`
(id)
VALUES
(1),
(1);

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