PostgreSQL入门到实战-第十四弹

PostgreSQL数据过滤(七)

BETWEEN运算符允许您检查值是否在值的范围内。

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https://www.postgresql.org/

PostgreSQL概述

PostgreSQL: 世界上最先进的开源关系数据库。

PostgreSQL中BETWEEN 命令理论

• 如果该值大于或等于低值且小于或等于高值，则BETWEEN运算符返回true；否则，返回false。

• 语法示意

  value BETWEEN low AND high;
  

• 类似的语法

  value >= low AND value <= high
  value NOT BETWEEN low AND high
  value < low OR value > high
  

PostgreSQL中BETWEEN 命令实战

数据库样例数据来源: https://blog.csdn.net/zwq56693/article/details/137473602

• 使用BETWEEN运算符检索payment_id介于17510和17505之间的付款

  SELECT 
    payment_id, 
    amount 
  FROM 
    payment 
  WHERE 
    payment_id BETWEEN 17503 AND 17505 
  ORDER BY 
    payment_id;
  

• 使用NOT BETWEEN运算符查找payment_id不在17510和17505之间的付款

  SELECT 
    payment_id, 
    amount 
  FROM 
    payment 
  WHERE 
    payment_id NOT BETWEEN 17503 AND 17505 
  ORDER BY 
    payment_id;
  

• 使用BETWEEN运算符查找付款日期在2007-02-14和2007-02-20之间且金额超过10的付款

  SELECT 
    payment_id, 
    amount, 
    payment_date 
  FROM 
    payment 
  WHERE 
    payment_date BETWEEN '2007-02-15' AND '2007-02-20' 
    AND amount > 10 
  ORDER BY 
    payment_date;
  

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