Generally speaking, data is case-sensitive,
but the writing of sql statements such as fields, table names, etc. is not case-sensitive.
If you want to strictly distinguish between upper and lower case in the table name, you need to add double quotation marks when creating the table name; the
interesting thing is that double quotation marks are used when creating the table, then double quotation marks need to be added when querying the table, otherwise The table cannot be found.
When the user name of the current database is used as the query condition, it must be capitalized;
you can also use show user to look at your user name before using it, which is generally capitalized;