Sql 语法接近，但我无法识别问题

我不断发现以下错误：

味精156，第15级，状态1，第4行
关键字“as”附近的语法不正确

味精156，第15级，状态1，第10行
关键字“between”附近的语法不正确

我看不出问题所在

use leads;

select *
    (select max(HighTrw) 
     from (values (trw1), (trw2), (trw21)) as Value (HighTrw)) as [high_trw]
from 
    dbo.spi s
Where 
    (select max(HighTrw)
     from (values (trw1), (trw2), (trw21)) As updatedate (HighTrw)) between '600' and '625'

---

您的代码看起来有点像SQL Server代码，因此我将使用该语法

你大概打算这样做：

select s.*, ss.high_trw
from dbo.spi s outer apply
     (select max(Value.HighTrw) as high_trw
      from (values (s.trw1), (s.trw2), (s.trw21)
           ) as Value(HighTrw)
     ) ss
where ss.high_trw between 600 and 625;

注:

• 您可以使用

  apply

  将子查询放入

  from

  子句中
• 一个明显的问题是在相关子查询之前缺少逗号
• 您应该学会限定所有列名。这对于相关子查询尤其重要

• 600

  和

  625

  看起来像数字，而不是字符串。如果是这样，常数不应该有引号

---

除了没有提供一些数据外，我还关心您的代码：

use leads;

-- There's no comma "," after the "*"
select*
-- This look like it belongs in the "from" section as a subquery, eg "(select ...) as sub"
-- You can then reference all of its contents in the main select using "sub.*"
(select max(HighTrw) from (values (trw1), (trw2), (trw21)) as Value(HighTrw)) as [high_trw]


from dbo.spi s

Where (select max(HighTrw)
-- Haven't seen this way of specifying a table before, is it valid? 
-- Why not explicitly define a temporary table above with the data you want, _before_ starting the query? - makes the code cleaner/clearer, IMO
            from (values (trw1), (trw2), (trw21)) As updatedate (HighTrw)) between '600' and '625'
-- There's no final ";" to terminate the query, might not be absolutely necessary, but good habit, 
-- because at some point, this code's going to dovetail into some other code, and the compiler will probably throw a wobbly

---

该查询是特定于产品的。您使用的是哪种dbms？要启动，请选择空格星号逗号

select*，

Yes对不起，SQL server就是dbms。失踪的人，耍了把戏谢谢大家的帮助。