在 SQL 中更新记录

Question

我有数据库我不知道如何更新列，因为它位于每次调用生成的表上。以下是调用相关列的代码：

select 
    a.itm_num as item_no,
    a.itm_proddesc as title,
    CAST(d.content as varchar(max)) as product_description
from item as a
join assignment as b on b.itm_id = a.itm_id
join attachment as c on c.att_id = b.att_id
join digitalassetcontent as d on d.content_key = c.content_key
where c.att_type like 'text%'

我需要更新 product_description 字段。我们在此列中有数千个条目，这些条目在实际文本前面有 HTML 编码。我需要运行查找和替换以删除文本之前的 html 编码。每个文本前的HTML代码完全一样，这里需要去掉：<STYLE>H1{font-weight:bold}H1{font-size: 14pt}OL</STYLE><H1>Product Description</H1>

我使用@Joel Coehoorn 解决方案运行了以下代码，其中包含我需要更新的内容密钥，它返回了“Msg 4104, Level 16, State 1, Line 13”的错误 无法绑定多部分标识符“d.content”。'

select 
    a.itm_num as item_no,
    a.itm_proddesc as title,
    CAST(d.content as varchar(max)) as product_description
from item as a
join assignment as b on b.itm_id = a.itm_id
join attachment as c on c.att_id = b.att_id
join digitalassetcontent as d on d.content_key = c.content_key
where c.att_type like 'text%'

Update digitalassetcontent
set content = replace(CAST(content as varchar(max)), '<STYLE>H1{font-weight:bold}H1{font-size: 14pt}OL</STYLE><H1>Product Description</H1>','')
where CAST(content as varchar(max)) like '<STYLE>H1{font-weight:bold}H1{font-size: 14pt}OL</STYLE><H1>Product Description</H1>%' AND content_key = 'desc214974236480438500781058983745755010'

谢谢！

马特

Answer 1

这只是digitalassetcontent.content 字段。您应该能够直接在该领域采取行动。该字段的实际类型是什么？

Update digitalassetcontent
set content = replace(CAST(d.content as varchar(max)), '<STYLE>H1{font-weight:bold}H1{font-size: 14pt}OL</STYLE><H1>Product Description</H1>','')
where CAST(d.content as varchar(max)) like '<STYLE>H1{font-weight:bold}H1{font-size: 14pt}OL</STYLE><H1>Product Description</H1>%'