Programmers can't SQL? Ashes Engineer: all waiting to be eliminated! This is a must skill!

SQL Since its birth , Although it has passed 40 Years of history , however ： It is still a skill that every programmer should master .

Why do you say that ？

• Whether you're the front end 、 Back end 、APP Development 、AI、 Testing and even operation and maintenance , As long as the database is involved , Then you must use SQL.

• Internet development to today , Not only R & D needs to be SQL, Even many products 、 Operations have also begun to use SQL. For example, check the number of clicks on a page 、 Click through rate and so on .

• Business people are beginning to use SQL 了 , If the development will not ？ Is it a little unreasonable ！

• If you often visit recruitment websites , It's not hard to find out , Almost all R & D Posts require SQL！ If you don't SQL, Even the best programming language , The interview will inevitably be rejected

SQL Not at all , How to be a programmer ？

I'm learning SQL Have you ever encountered these problems when you were ：

1. Why my count(*) So slowly ?

2. Why did I index , But it didn't work at all ?

3. Why do I only look up one line of statements , It's so slow ?

4. MySQL How to optimize large tables ?

Technical side （ Based on the foundation ）

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Two sides of Technology （ database , Basic , I still don't remember some questions ）

On three sides （ Locking is mainly viewed from a dynamic point of view ）

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Four sides

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Interview summary

When it comes to interviews , There are pits everywhere , So , Xiaobian recently specially collated and summarized a complete set of interview materials and learning notes , For your reference （ There are benefits at the end of the article ）~

• First of all, my study notes

（1）SQL Learning notes （ Unlike the core notes circulating online ）：

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（2）SQL Interview classic questions

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（4）SQL Family bucket notes

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• There is also a study outline

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• There is also a learning video to share

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