Hi,
I have a table 'tmvt' with a field 'created' in the row, and would like to
compute the difference between successive rows. The solution I found is:
It is complicate and very long to perform. The problem could be simply
solved with MySql by creating a new field and updating it using a statement
with @.
I beleive this is a common problem for users. Do you know a simpler solution
with postgreSql?
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