Why does this SQL json index fail?

Why does this SQL JSON index fail in production. The SQL code stores JSON as text and queries with LIKE, so indexes are never used. In SQL services this becomes a performance trap.

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https://www.youtube.com/watch?v=HWFUhh6cj0M

What's wrong with this SQL order by?

What's wrong with this SQL order by in a search endpoint. The SQL code interpolates a user supplied sort field, enabling injection. In SQL backends this exposes data and crashes queries.

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https://www.youtube.com/watch?v=enGz-KrHnx4

SQL joins are the backbone of relational data analysis.

They help combine tables to extract meaningful insights — from inner joins that show matches to outer joins that reveal unmatched data.

Mastering joins turns raw data into relationships that tell real business stories.

📕 https://ebokify.com/data-analysis

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What's the most sophisticated query you've written to solve a real-world problem? How did it take advantage of PostgreSQL's capabilities?

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