Trilium/docs/Developer Guide/Developer Guide/Development and architecture/Database/blobs.md

blobs

Column Name	Data Type	Nullity	Default value	Description
blobId	Text	Non-null		The unique ID of the blob (e.g. XXbfAJXqWrYnSXcelLFA). Important: this ID is actually a hash of the content, see AbstractBeccaEntity#saveBlob! It is a logic error to modify an existing blob.
content	Text	Nullable	null	The content of the blob, can be either: text (for plain text notes or HTML notes). binary (for images and other types of attachments)
dateModified	Text	Non-null		Creation date with timezone offset (e.g. 2023-11-08 18:43:44.204+0200)
utcDateModified	Text	Non-null		Creation date in UTC format (e.g. 2023-11-08 16:43:44.204Z). Blobs cannot be modified, so this timestamp specifies when the blob was created.