sql 中 between 运算符用于检查值是否在指定范围之内,其语法为:select column_name from table_name where column_name between start_value and end_value。同时,not between 运算符用于检查值是否不在指定范围之内,其语法为:select column_name from table_name where column_name not between start_value and end_va
SQL 中 BETWEEN 的用法
BETWEEN 运算符用于检查值是否在指定范围之内。其语法如下:
SELECT column_name
FROM table_name
WHERE column_name BETWEEN start_value AND end_value;
示例:
以下查询返回所有订单金额在 100 美元到 500 美元之间的订单:
SELECT order_id, order_amount
FROM orders
WHERE order_amount BETWEEN 100 AND 500;
用法细则:
- start_value 和 end_value 可以是数字、日期或字符串。
- 范围是闭合的,即 BETWEEN 运算符会将 start_value 和 end_value 包含在范围内。
- 如果值小于 start_value 或大于 end_value,则该行将被排除在外。
- 如果 start_value 大于 end_value,则查询将返回空结果集。
- BETWEEN 运算符可以与其他运算符(例如 AND、OR)一起使用。
NOT BETWEEN
NOT BETWEEN 运算符用于检查值是否不在指定范围之内。其语法如下:
SELECT column_name
FROM table_name
WHERE column_name NOT BETWEEN start_value AND end_value;
示例:
以下查询返回所有订单金额不在 100 美元到 500 美元之间的订单:
SELECT order_id, order_amount
FROM orders
WHERE order_amount NOT BETWEEN 100 AND 500;
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