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Suppose i have one table that holds Blogs.
The schema looks like :
ID (int)| Title (varchar 50) | Value (longtext) | Images (longtext)| ....
In the field Images i store an XML Serialized List of images that are associated with the blog.
Should i use another table for this purpose?
Yes, you should put the images in another table. Having several values in the same field indicates denormalized data and makes it hard to work with the database.
As with all rules, there are exceptions where it makes sense to put XML with multiple values in one field in the database. The first rule is that:
If that is fulfilled, there can be a number of reasons to put the data together in one field: