sql-technology is the use of details between and

Did a w3schoolsql test, 20 questions incredibly wrong 1, now analyzed and summarized as follows:

Baidu a bit, between and is a "A, B" fully closed structure, that is, greater than or equal to a and less than or equal to B.

The results of the operation are as follows

1) between and

2) greater than, less than

Sentiment: technology is the real rule, lies in the details of the grasp, that is, the need for breadth and depth, but also to grasp the details, otherwise it is easy to make a bug.

sql-technology is the use of details between and