mysql order by 语法：SELECT field1, field2,...fieldN table_name1, table_name2...ORDER BY field1, [field2...] [ASC [DESC]]
说明： - 你可以使用任何字段来作为排序的条件，从而返回排序后的查询结果。
- 你可以设定多个字段来排序。
- 你可以使用 ASC 或 DESC 关键字来设置查询结果是按升序或降序排列。 默认情况下，它是按升排列。
- 你可以添加 WHERE...LIKE 子句来设置条件。
mysql order by实例首先创建一张表： mysql> CREATE TABLE Employee( -> id int, -> first_name VARCHAR(15), -> last_name VARCHAR(15), -> start_date DATE, -> end_date DATE, -> salary FLOAT(8,2), -> city VARCHAR(10), -> description VARCHAR(15) -> );Query OK, 0 rows affected (0.03 sec)
向表中插入若干数据： mysql> insert into Employee(id,first_name, last_name, start_date, end_Date,salary,City, Description) ->values (1,'Jason', 'Martin', '19960725', '20060725', 1234.56, 'Toronto', 'Programmer');Query OK, 1 row affected (0.02 sec)mysql>mysql> insert into Employee(id,first_name, last_name, start_date, end_Date,salary,City, Description) ->values(2,'Alison', 'Mathews', '19760321', '19860221', 6661.78, 'Vancouver','Tester');Query OK, 1 row affected (0.00 sec)mysql>mysql> insert into Employee(id,first_name, last_name, start_date, end_Date,salary,City, Description) ->values(3,'James', 'Smith', '19781212', '19900315', 6544.78, 'Vancouver','Tester');Query OK, 1 row affected (0.00 sec)mysql>mysql> insert into Employee(id,first_name, last_name, start_date, end_Date,salary,City, Description) ->values(4,'Celia', 'Rice', '19821024', '19990421', 2344.78, 'Vancouver','Manager');Query OK, 1 row affected (0.00 sec)mysql>mysql> insert into Employee(id,first_name, last_name, start_date, end_Date,salary,City, Description) ->values(5,'Robert', 'Black', '19840115', '19980808', 2334.78, 'Vancouver','Tester');Query OK, 1 row affected (0.00 sec)mysql>mysql> insert into Employee(id,first_name, last_name, start_date, end_Date,salary,City, Description) ->values(6,'Linda', 'Green', '19870730', '19960104', 4322.78,'New York', 'Tester');Query OK, 1 row affected (0.00 sec)mysql>mysql> insert into Employee(id,first_name, last_name, start_date, end_Date,salary,City, Description) ->values(7,'David', 'Larry', '19901231', '19980212', 7897.78,'New York','Manager');Query OK, 1 row affected (0.00 sec)mysql>mysql> insert into Employee(id,first_name, last_name, start_date, end_Date,salary,City, Description) ->values(8,'James', 'Cat', '19960917', '20020415', 1232.78,'Vancouver', 'Tester');Query OK, 1 row affected (0.02 sec)
查询数据并对结果集排序： mysql> SELECT first_name, start_date FROM employee ORDER BY start_date;+------------+------------+| first_name | start_date |+------------+------------+| Alison | 1976-03-21 || James | 1978-12-12 || Celia | 1982-10-24 || Robert | 1984-01-15 || Linda | 1987-07-30 || David | 1990-12-31 || Jason | 1996-07-25 || James | 1996-09-17 |+------------+------------+8 rows in set (0.02 sec)
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