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Summary mysql query comprehensive exercise 0-personal memo

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Summary mysql query comprehensive exercise 0-personal memo Command Line Mode 1. encoding format conversion (the command line is gbk encoding, and mysql must be told to be gbk encoding)

2. Insert a table, as shown in

3. Obtain the field attribute www.2cto.com of the definition table.

4. Calculate the average value of each course for all students

5. Find the identifier of each student failing each course (1 indicates failing, 0 indicates passing)

6. Find the number of student subjects

7. Find the average score and the number of students with the same number of subjects

Author hehe9737

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