返回 MySQL SHOW COLUMNS 的顺序？

要返回 MySQL SHOW COLUMNS 的顺序，您需要使用 ORDER BY 子句。语法如下 -

SELECT COLUMN_NAME
FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_name = ‘yourTableName’
AND column_name LIKE 'yourStartColumnName%'
ORDER BY column_name DESC;

让我们在 TEST 数据库中创建一个表。创建表的查询如下 -

mysql> create table OrderByColumnName
   -> (
   -> StudentId int,
   -> StudentFirstName varchar(10),
   -> StudentLastName varchar(10),
   -> StudentAddress varchar(20), 
   -> StudentAge int,
   -> StudentMarks int
   -> );
Query OK, 0 rows affected (1.81 sec)

案例 1 -

在此，结果按降序排列。以下是返回 MySQL 中 show column 顺序的查询 -

mysql> SELECT COLUMN_NAME
   -> FROM INFORMATION_SCHEMA.COLUMNS
   -> WHERE table_name = 'OrderByColumnName'
   -> AND column_name LIKE 'student%'
   -> ORDER BY column_name DESC;

以下是输出 -

+------------------+
| COLUMN_NAME      |
+------------------+
| StudentMarks     |
| StudentLastName  |
| StudentId        |
| StudentFirstName |
| StudentAge       |
| StudentAddress   |
+------------------+
6 rows in set (0.00 sec)

案例 2 - 如果您想按升序排列结果，则无需编写 ASC 关键字，因为默认情况下结果将按升序排列。

查询如下 -

mysql> SELECT COLUMN_NAME
   -> FROM INFORMATION_SCHEMA.COLUMNS
   -> WHERE table_name = 'OrderByColumnName' 
   -> AND column_name LIKE 'student%'
   -> ORDER BY column_name;

以下是输出 -

+------------------+
| COLUMN_NAME      |
+------------------+
| StudentAddress   |
| StudentAge       |
| StudentFirstName |
| StudentId        |
| StudentLastName  |
| StudentMarks     |
+------------------+
6 rows in set (0.00 sec)

更新于: 2019-07-30

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