SQLite – ORDER BY子句
The SQLite ORDER BY子句用于数据按升序或降序排序,基于一个或多个列。
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];
您可以使用多个列在ORDER BY子句。确保使用的任何列,该列应该在column-list可用。
例子：
COMPANY table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 下面是一个例子,工资将按降序排序结果:
sqlite> SELECT * FROM COMPANY ORDER BY SALARY ASC;
这将产生以下结果:
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 下面是一个例子,这将在降序排序结果的姓名和工资:
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 下面是一个例子,这将在降序排序结果名称:
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
