SQLite – ORDER 子句

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