SQLite ORDER BY 子句
SQLite ORDER BY 子句
ORDER BY 子句用于根据一列或多列按升序或降序对数据进行排序。
语法
SELECT column-list FROM table_name [WHERE condition] [ORDER BY column1, column2, .. columnN] [ASC | DESC];
ORDER BY子句中可以使用多个列。确保无论您使用什么列进行排序,该列都应该在列列表中可用。
例子
假设COMPANY表包含如下数据.
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
下面的例子,将按SALARY升序对结果进行排序。
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
下面是一个示例,它将按NAME和SALARY升序对结果进行排序。
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
下面的示例,它将按NAME.降序对结果进行排序。
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