Question

我有一个Daily_account表：

customer_id    account_id            current_balance

1                 D1                       200
2                 d2                       300
3                 d10                      400
4                 d100                     500
5                 d101                     600

现在我有一个问题：

select customer_id,account_id,current_balance
from daily_account
where account_id between 'D1' and'D100'

它给出了D1，D10，D100的账号no的输出，但是我希望得到每个no的输出。如何获得介于D1和d100之间的每个帐户的输出？

Answer 1

经过一些研究，我发现一个函数是强制函数，它给了我答案....

select  customer_id, account_id,current_balance  from daily_account 
where cast(right(Account_id,(length(account_id)-1)) AS unsigned) 
between '1' and'100'

Answer 2

上面代码段中的between语句使用字符串，这与数字排序不同。

如果account_id始终以'D'开头，我们可以删除它并将其转换为数字：

SELECT *
, REPLACE(account_id, 'd','0') // just replace
, CAST( REPLACE(account_id, 'd','0') as int) // now convert to int
FROM daily_account

并在两者之间使用它，像这样使用

SELECT customer_id,account_id,current_balance
FROM daily_account
WHERE 
CAST( REPLACE(account_id, 'd','0') as int) between 1 and 100

Answer 3

如果一切都以一个字符开头，你可以这样做：

SELECT * FROM (
SELECT customer_id
     , CAST(REPLACE(account_id,'d','') AS int) account_id
     , current_balance
FROM daily_account) tbl
WHERE account_id between '1' and'100'

Answer 4

一个技巧是删除account_id中的非数字，如下所示：

SELECT * FROM Daily_account WHERE CAST(REPLACE(account_id,'D','') AS INT) BETWEEN 1 AND 10

Answer 5

select customer_id,account_id,current_balance
from daily_account
where CAST(replace(account_id, 'D', '') as int) between 1 and 100

Answer 6

您的回答似乎暗示您希望解决方案能够使用各种前缀，而不仅仅是'D'。如果是这种情况，请考虑以下替代方案：

SELECT customer_id, account_id, current_balance
FROM daily_account
WHERE STUFF(account_id, 1, 1, '') between 1 and 100
;

以上是SQL Server，但由于您的回答似乎暗示您使用的是MySQL，因此这里有一个MySQL等价物：

SELECT customer_id, account_id, current_balance
FROM daily_account
WHERE INSERT(account_id, 1, 1, '') between 1 and 100
;

如何编写一个返回“之间”以返回字母数据的查询，而不仅仅是数字？

6 个答案: