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https://dev.mysql.com/doc/refman/9.7/en/upgrade-troubleshooting.html

A schema mismatch in a MySQL 9.6 instance between the .frm file of a table and the InnoDB data dictionary can cause an upgrade to MySQL 9.7 to fail. To address this issue, dump and restore affected tables before attempting the upgrade again. If ...

B.3.1 How to Determine What Is Causing a Problem

https://dev.mysql.com/doc/refman/9.7/en/what-is-crashing.html

This can normally be checked by pressing the Caps Lock key. If the Caps Lock light does not change, you have to replace your keyboard. (Before doing this, you should try to restart your computer and check all cables to the keyboard.) The mouse ...

1.2.1 What is MySQL?

https://dev.mysql.com/doc/refman/9.7/en/what-is-mysql.html

MySQL, the most popular Open Source SQL database management system, is developed, distributed, and supported by Oracle Corporation. The MySQL website (http://www.mysql.com/) provides the latest information about MySQL software. It may be anything ...

14.20.3 Window Function Frame Specification

https://dev.mysql.com/doc/refman/9.7/en/window-functions-frames.html

The definition of a window used with a window function can include a frame clause. A frame is a subset of the current partition and the frame clause specifies how to define the subset. Frames are determined with respect to the current row, which ...

13.2.4 The YEAR Type

https://dev.mysql.com/doc/refman/9.7/en/year.html

The YEAR type is a 1-byte type used to represent year values. It can be declared as YEAR with an implicit display width of 4 characters, or equivalently as YEAR(4) with an explicit display width. Note The YEAR(4) data type using an explicit display ...