Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I am new to databases. I have two sqlite3 databases of same size. I created dumps from both the databases and compared them with diffuse tool. They have zero differences. I have also compared the schema of both the databases & found them to be same. Finally I compared them using “sqlite compare” tool. It shows that both have exactly same data & schema. Yet both of them have different md5sums. I just needed to know what else might be different in them. Thanks in advance
This is normal. A database can be fragmented, have gaps where rows were deleted which will affect the exact bytes stored on disc but not what a database client sees. This will depend not just on the current state of the database but also it’s history: what is the sequence of inserts, updates, deletes etc that lead to the current state.
Operations like
VACUUMdon’t change the stored data but do do things like reclaim empty space and so on, which would change the md5 sums.