魚魚是鯨不是金

1.【報錯】Unknown column 'XXXX' in having clause

可改為having max(Salary)

 2.【報錯】Operand should contain 1 column(s)

in后只能有一個字段

 3.【報錯】You have an error in your SQL syntax;check the manual that corresponds to your MySQL server version for the right syntax to use near')'（單引號內可以是其它的，這是語法錯誤，檢查下拼寫啥的……還有別的再補充）