这是一个表结构(例如测试):
__________________________________________
| Field Name | Data Type |
|________________|_________________________|
| id | BIGINT (20) |
|________________|_________________________|
| title | varchar(25) |
|________________|_________________________|
| description | text |
|________________|_________________________|
如下的查询:
SELECT * FROM TEST ORDER BY description DESC;
但我想按字段描述的字段大小/长度排序。字段类型为TEXT或BLOB。
答案 0 :(得分:131)
SELECT * FROM TEST ORDER BY LENGTH(description) DESC;
LENGTH
函数给出字符串的长度(以字节为单位)。如果要计算(多字节)字符,请改用CHAR_LENGTH
函数:
SELECT * FROM TEST ORDER BY CHAR_LENGTH(description) DESC;
答案 1 :(得分:4)
SELECT * FROM TEST ORDER BY CHAR_LENGTH(description);
答案 2 :(得分:3)
对于那些使用MS SQL的人
SELECT * FROM TEST ORDER BY LEN(field)