Stop Slow Queries! Master SQL Optimization in 10 Easy Steps

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Hey everyone, it's Your Friend Manish here! 👋 As someone who has spent years diving deep into the world of databases, I've honed my skills and achieved some incredible milestones in SQL optimization. Today, I want to share my top 10 techniques that can significantly enhance your query performance. Ready to level up your SQL game? Let's dive in! 🚀

1️⃣ Use Column Names Instead of * in a SELECT Statement: This reduces unnecessary data retrieval and speeds up your queries.

2️⃣ Avoid including a HAVING clause in SELECT statements: Unless absolutely necessary, it’s more efficient to use WHERE clauses.

3️⃣ Eliminate Unnecessary DISTINCT Conditions: Simplify your queries and avoid redundant operations.

4️⃣ Un-nest sub queries: Flattening sub queries can often lead to more efficient execution plans.

5️⃣ Consider using an IN predicate when querying an indexed column: This can leverage indexes better than multiple OR conditions.

6️⃣ Use EXISTS instead of DISTINCT when using table joins that involves tables having one-to-many relationships: EXISTS can be more performant and easier for the database engine to optimize.

7️⃣ Try to use UNION ALL in place of UNION: UNION ALL is faster because it doesn't remove duplicate rows.

8️⃣ Avoid using OR in join conditions: Instead, use UNION or separate queries to handle different conditions.

9️⃣ Avoid functions on the right-hand side of the operator: Functions can prevent the use of indexes and slow down query performance.

🔟 Remove any redundant mathematics: Simplify your calculations within your queries to avoid unnecessary processing.

Did you know? According to a study by IBM, optimizing SQL queries can improve database performance by up to 50% 🚀. Leveraging these techniques not only boosts efficiency but also ensures your applications run smoothly.

Which of these tips are you excited to try out? Drop a COMMENT below and let me know! 👇

📺 Subscribe for more SQL tutorials and stay ahead in your tech journey! 🚀

[Rebellionrider]

Hey everyone, it's Your Friend Manish here! 👋 As someone who has spent years diving deep into the world of databases, I've honed my skills and achieved some incredible milestones in SQL optimization. Today, I want to share my top 10 techniques that can significantly enhance your query performance. Ready to level up your SQL game? Let's dive in! 🚀

1️⃣ Use Column Names Instead of * in a SELECT Statement: This reduces unnecessary data retrieval and speeds up your queries.

2️⃣ Avoid including a HAVING clause in SELECT statements: Unless absolutely necessary, it’s more efficient to use WHERE clauses.

3️⃣ Eliminate Unnecessary DISTINCT Conditions: Simplify your queries and avoid redundant operations.

4️⃣ Un-nest sub queries: Flattening sub queries can often lead to more efficient execution plans.

5️⃣ Consider using an IN predicate when querying an indexed column: This can leverage indexes better than multiple OR conditions.

6️⃣ Use EXISTS instead of DISTINCT when using table joins that involves tables having one-to-many relationships: EXISTS can be more performant and easier for the database engine to optimize.

7️⃣ Try to use UNION ALL in place of UNION: UNION ALL is faster because it doesn't remove duplicate rows.

8️⃣ Avoid using OR in join conditions: Instead, use UNION or separate queries to handle different conditions.

9️⃣ Avoid functions on the right-hand side of the operator: Functions can prevent the use of indexes and slow down query performance.

🔟 Remove any redundant mathematics: Simplify your calculations within your queries to avoid unnecessary processing.

Did you know? According to a study by IBM, optimizing SQL queries can improve database performance by up to 50% 🚀. Leveraging these techniques not only boosts efficiency but also ensures your applications run smoothly.

Which of these tips are you excited to try out? Drop a COMMENT below and let me know! 👇

[nareshkumar-kni]

Will you suggest any best Sql query optimization videos form basic to advance thanks.

[yeshichoedon]

Hi Manish, quick question about sql server ?can sql server can track other server ?I mean this people can change fail to pass if u explain me that will great.

[AnandA-op]

Hi this plsql book not available now in Amazon...can you give any other link to bye this book

[VAR]

Make video about how to improve performance and its types.

[mustansarhussain]

please make a proper video on this topic.