SQLite ORDER BY

SQLite 的 ORDER BY 语句是用来基于一个或多个列按升序或降序顺序排列数据。


语法

ORDER BY 子句的基本语法如下:

SELECT column-list 
FROM table_name 
[WHERE condition] 
[ORDER BY column1, column2, .. columnN] [ASC | DESC];

可以在 ORDER BY 子句中使用多个列。确保您使用的排序列在列清单中。

示例

假设 COMPANY 表有以下记录:

ID          NAME        AGE         ADDRESS     SALARY
----------  ----------  ----------  ----------  ----------
1           Paul        32          California  20000.0
2           Allen       25          Texas       15000.0
3           Teddy       23          Norway      20000.0
4           Mark        25          Rich-Mond   65000.0
5           David       27          Texas       85000.0
6           Kim         22          South-Hall  45000.0
7           James       24          Houston     10000.0

下面示例会将结果按 SALARY 升序排序:

sqlite> SELECT * FROM COMPANY ORDER BY SALARY ASC;

结果如下:

ID          NAME        AGE         ADDRESS     SALARY
----------  ----------  ----------  ----------  ----------
7           James       24          Houston     10000.0
2           Allen       25          Texas       15000.0
1           Paul        32          California  20000.0
3           Teddy       23          Norway      20000.0
6           Kim         22          South-Hall  45000.0
4           Mark        25          Rich-Mond   65000.0
5           David       27          Texas       85000.0

下面示例将结果按 NAME 和 SALARY 升序排序:

sqlite> SELECT * FROM COMPANY ORDER BY NAME, SALARY ASC;

结果如下:

ID          NAME        AGE         ADDRESS     SALARY
----------  ----------  ----------  ----------  ----------
2           Allen       25          Texas       15000.0
5           David       27          Texas       85000.0
7           James       24          Houston     10000.0
6           Kim         22          South-Hall  45000.0
4           Mark        25          Rich-Mond   65000.0
1           Paul        32          California  20000.0
3           Teddy       23          Norway      20000.0

下面示例,它会将结果按 NAME 降序排序:

sqlite> SELECT * FROM COMPANY ORDER BY NAME DESC;

结果如下:

ID          NAME        AGE         ADDRESS     SALARY
----------  ----------  ----------  ----------  ----------
3           Teddy       23          Norway      20000.0
1           Paul        32          California  20000.0
4           Mark        25          Rich-Mond   65000.0
6           Kim         22          South-Hall  45000.0
7           James       24          Houston     10000.0
5           David       27          Texas       85000.0
2           Allen       25          Texas       15000.0

查看笔记

扫码一下
查看教程更方便