SQLite的ORDER BY子句是用来基于一个或多个列按升序或降序排列数据。
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];
你可以在ORDER BY 子句中使用多个列。确保你使用的排序在列表清单中。
实例
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
下面是一个实例,它会将结果按SALARY升序排序:
sqlite> SELECT * FROM COMPANY ORDER BY SALARY ASC;
这将产生如下结果:
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
下面是一个实例,它会将结果按NAME和SALARY升序排序:
sqlite> SELECT * FROM COMPANY ORDER BY NAME, SALARY ASC;
这将产生以下结果:
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
下面是一个实例,它会将结果按NAME降序排序:
sqlite> SELECT * FROM COMPANY ORDER BY NAME DESC;
这将产生以下结果:
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
参考:
https://www.yuque.com/docs/share/743c8698-457d-4ef3-b3fb-200ba274f0f9