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Posts on tips and tricks, using and learning about SQL for database development and analysis.

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SQL Subqueries vs CTEs: What I Wish Someone Told Me When I Was Learning SQL

SQL Subqueries vs CTEs: What I Wish Someone Told Me When I Was Learning SQL

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3 min read
Understanding Subquery and Common Table Expressions(CTEs)

Understanding Subquery and Common Table Expressions(CTEs)

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2 min read
You Want To Learn SQL? Here Is What I know So far...

You Want To Learn SQL? Here Is What I know So far...

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3 min read
SQL Building Blocks: How Subqueries and CTEs Shape Your Data

SQL Building Blocks: How Subqueries and CTEs Shape Your Data

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3 min read
Data Analyst Interview Questions 2026: What Actually Shows Up Across All Three Rounds

Data Analyst Interview Questions 2026: What Actually Shows Up Across All Three Rounds

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4 min read
SQLite Verification, pg_savior, & PostgreSQL Restore Strategies

SQLite Verification, pg_savior, & PostgreSQL Restore Strategies

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3 min read
PostgreSQL Index Usage and Optimization

PostgreSQL Index Usage and Optimization

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7 min read
learning SQL with practice (sqlbolt.com)

learning SQL with practice (sqlbolt.com)

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1 min read
SQL Course for Analysts: Pick, Learn, Apply Fast

SQL Course for Analysts: Pick, Learn, Apply Fast

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3 min read
archery-cli: A psql-style CLI for Archery — Query Databases from Terminal or AI Agents

archery-cli: A psql-style CLI for Archery — Query Databases from Terminal or AI Agents

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3 min read
MySQL 的 MVCC:看不见的“时间机器”怎么帮你躲过脏读和幻读?

MySQL 的 MVCC:看不见的“时间机器”怎么帮你躲过脏读和幻读?

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1 min read
The stored procedure ran fine in SSMS — under 1 second, every time. But through the .NET API? 30–120 seconds. Timeouts. Errors.

The stored procedure ran fine in SSMS — under 1 second, every time. But through the .NET API? 30–120 seconds. Timeouts. Errors.

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2 min read
Data Engineers Don't Need DSA. So Why Do Interviews Still Test It?

Data Engineers Don't Need DSA. So Why Do Interviews Still Test It?

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7 min read
SQL Window Functions Explained: Stop Collapsing Your Data with GROUP BY

SQL Window Functions Explained: Stop Collapsing Your Data with GROUP BY

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6 min read
SQL GROUP BY & HAVING: The Beginner's Guide to Summarizing Data Like a Pro

SQL GROUP BY & HAVING: The Beginner's Guide to Summarizing Data Like a Pro

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6 min read
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