在BETWEEN子句中使用SQL子查詢獲取日期

Question

MySQL中的這種多選擇SQL有什么問題：

select *
from license
where license.expirydate between (
   (select monthrange.monthstart from monthrange where id = 1)
   and
   (select monthrange.monthend from monthrange where id = 1)
)

Answer 1

這是您的查詢：

select *
from license
where license.expirydate between ((select monthrange.monthstart from monthrange where id = 1) and 
                                  (select monthrange.monthend from monthrange where id = 1)
                                 )

between的參數不應放在括號中。 嘗試這個：

select *
from license
where license.expirydate between (select monthrange.monthstart from monthrange where id = 1) and 
                                 (select monthrange.monthend from monthrange where id = 1)

當然，您也可以將其表示為join 。 此答案僅用於注釋語法錯誤：

select l.*
from license l join
     monthrange m
     on l.expirydate between m.monthstart and m.monthend and
        m.id = 1;