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How to resolve errors when declaring variables in MySQL?

What are the characteristics of method overloading in Java?

What is the usage of WebSocket in PHP?

How do you use the append function in the Go language?

What are the types of methods in Java?

What is the purpose of the pow function in C++?

What is the purpose of websocket in PHP?

What are the principles of Oracle index optimization?

What is the method for removing an index in Oracle?

What are the methods for optimizing full-text indexes in MySQL?