根据列值从单个表中选择多个间隔

Question

我打算同时根据列值选择多个间隔。这是可能的           

这是我的样本数据，它由1024行组成，我想根据波长列选择多个区间ex：（341-348）（551-664）（998-1021）来自单个表

Answer 1

您应该使用BETWEEN和OR来获取记录：

SELECT * FROM TABLE1 
   WHERE wavelenght BETWEEN 341 AND 348 
         OR wavelenght BETWEEN 551 AND 664  
         OR wavelenght BETWEEN 998 AND 1021  

Answer 2

要查询不是特定值，而是查询一系列值，SQL为BETWEEN子句（http://www.w3schools.com/sql/sql_between.asp）发明了WHERE运算符，例如

SELECT columns
FROM yourtable
WHERE wavelength BETWEEN lowerbound AND upperbound;