SQLite BLOB Overview
SQLite has flexible type system; BLOB type stores arbitrary binary data with no explicit size limit (limited by disk space). Ideal for lightweight PDF storage scenarios.
Step-by-Step Implementation
Method 1: Manual SQL Statements (Primary Method)
1. Create Table
CREATE TABLE pdf_storage (
id INTEGER PRIMARY KEY AUTOINCREMENT,
pdf_name TEXT,
pdf_data BLOB
);
2. Insert PDF Data
INSERT INTO pdf_storage (pdf_name, pdf_data)
VALUES ('sample.pdf', readfile('sample.pdf'));
Method 2: Using DBBlobEditor (Optional Visual Tool)
DBBlobEditor directly opens SQLite .db files (no server required), enables batch import of PDF files, and provides one-click backup of the entire database including BLOB data.
- View PDF stored in SQLite BLOB field
- Batch import PDF files into SQLite BLOB
- Batch export SQLite BLOB to PDF files
SQLite BLOB Issues & Solutions
- Performance: Avoid storing thousands of large PDFs (SQLite is lightweight, not for high-volume enterprise use)
- Backup: Simply copy the SQLite database file (includes all BLOB data)