SQL ORDER BY排序子句

SQL ORDER BY子句用於按升序或降序排序數據在一列或多列的基礎上。一些數據庫默認排序查詢結果按升序排列。

語法

ORDER BY子句的基本語法如下:

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

您可以在ORDER BY子句使用多列。確保任何列使用排序,column應該是在column-list中。

例子:

考慮CUSTOMERS表具有以下記錄:

+----+----------+-----+-----------+----------+ | ID | NAME | AGE | ADDRESS | SALARY | +----+----------+-----+-----------+----------+ | 1 | Ramesh | 32 | Ahmedabad | 2000.00 | | 2 | Khilan | 25 | Delhi | 1500.00 | | 3 | kaushik | 23 | Kota | 2000.00 | | 4 | Chaitali | 25 | Mumbai | 6500.00 | | 5 | Hardik | 27 | Bhopal | 8500.00 | | 6 | Komal | 22 | MP | 4500.00 | | 7 | Muffy | 24 | Indore | 10000.00 | +----+----------+-----+-----------+----------+

下面是一個例子,將結果通過NAME和SALARY升序排序:

SQL> SELECT * FROM CUSTOMERS
ORDER BY NAME, SALARY;

這將產生以下結果:

+----+----------+-----+-----------+----------+ | ID | NAME | AGE | ADDRESS | SALARY | +----+----------+-----+-----------+----------+ | 4 | Chaitali | 25 | Mumbai | 6500.00 | | 5 | Hardik | 27 | Bhopal | 8500.00 | | 3 | kaushik | 23 | Kota | 2000.00 | | 2 | Khilan | 25 | Delhi | 1500.00 | | 6 | Komal | 22 | MP | 4500.00 | | 7 | Muffy | 24 | Indore | 10000.00 | | 1 | Ramesh | 32 | Ahmedabad | 2000.00 | +----+----------+-----+-----------+----------+

下面是一個例子,這將結果通過NAME降序排序:

SQL> SELECT * FROM CUSTOMERS
ORDER BY NAME DESC;

這將產生以下結果:

+----+----------+-----+-----------+----------+ | ID | NAME | AGE | ADDRESS | SALARY | +----+----------+-----+-----------+----------+ | 1 | Ramesh | 32 | Ahmedabad | 2000.00 | | 7 | Muffy | 24 | Indore | 10000.00 | | 6 | Komal | 22 | MP | 4500.00 | | 2 | Khilan | 25 | Delhi | 1500.00 | | 3 | kaushik | 23 | Kota | 2000.00 | | 5 | Hardik | 27 | Bhopal | 8500.00 | | 4 | Chaitali | 25 | Mumbai | 6500.00 |

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