SQL 在 text 或 ntext 数据类型上替代 REPLACE
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alternatives to REPLACE on a text or ntext datatype
提问by ethem
I need to update/replace the data in datatable.column. The table has a field named Content
. I'm using the REPLACE
function. Since the column datatype is NTEXT
, SQL Server doesn't allow me to use the REPLACE
function.
我需要更新/替换 datatable.column 中的数据。该表有一个名为 的字段Content
。我正在使用该REPLACE
功能。由于列数据类型是NTEXT
,SQL Server 不允许我使用该REPLACE
函数。
I can't change the datatype because this database is 3rd party software table. Changing the datatype will cause the application to fail.
我无法更改数据类型,因为此数据库是 3rd 方软件表。更改数据类型将导致应用程序失败。
UPDATE [CMS_DB_test].[dbo].[cms_HtmlText]
SET Content = REPLACE(Content,'ABC','DEF')
WHERE Content LIKE '%ABC%'
I Receive this error:
我收到此错误:
Msg 8116, Level 16, State 1, Line 1 Argument data type ntext is invalid for argument 1 of replace function.
消息 8116,级别 16,状态 1,第 1 行 参数数据类型 ntext 对替换函数的参数 1 无效。
- Can I fix this with T-SQL? Does someone have an example how to read and to loop?
- Since this is onetime conversion, maybe I can change to another type but I'm afraid I'm messing up the data.
- 我可以用 T-SQL 解决这个问题吗?有人有如何阅读和循环的例子吗?
- 由于这是一次性转换,也许我可以更改为另一种类型,但我担心我会弄乱数据。
There is a primary key field: name: ID - integer - it's an identity.... So I need to think about this too. Maybe set the Identity to N temporary.
有一个主键字段:名称:ID - 整数 - 它是一个身份......所以我也需要考虑这一点。也许将 Identity 设置为 N 临时。
Please advise on how to achieve the REPLACE function?
请教如何实现REPLACE功能?
Approx. 3000 statements need to be updated with a new solution.
大约 3000 条语句需要使用新解决方案进行更新。
回答by p.campbell
IFyour data won't overflow 4000 characters ANDyou're on SQL Server 2000 or compatibility level of 8 or SQL Server 2000:
如果您的数据不会溢出 4000 个字符并且您使用的是 SQL Server 2000 或兼容级别为 8 或 SQL Server 2000:
UPDATE [CMS_DB_test].[dbo].[cms_HtmlText]
SET Content = CAST(REPLACE(CAST(Content as NVarchar(4000)),'ABC','DEF') AS NText)
WHERE Content LIKE '%ABC%'
For SQL Server 2005+:
对于 SQL Server 2005+:
UPDATE [CMS_DB_test].[dbo].[cms_HtmlText]
SET Content = CAST(REPLACE(CAST(Content as NVarchar(MAX)),'ABC','DEF') AS NText)
WHERE Content LIKE '%ABC%'
回答by LittleBobbyTables - Au Revtheitroad
Assuming SQL Server 2000, the following StackOverflow questionshould address your problem.
假设 SQL Server 2000,以下StackOverflow 问题应该可以解决您的问题。
If using SQL Server 2005/2008, you can use the following code (taken from here):
如果使用 SQL Server 2005/2008,则可以使用以下代码(取自此处):
select cast(replace(cast(myntext as nvarchar(max)),'find','replace') as ntext)
from myntexttable