Marmite Bomber

Marmite Bomber has asked 4 questions and find answers to 64 problems.

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Marmite Bomber questions

Order Independent Hash in Java
Abbreviation of Strings that Remains Unique
How to describe performance issue in relational database?

Marmite Bomber answers

how to export data frame (R) into Oracle table
Why optimizer plan doesn't correlate with experimental query runs?
SQL Oracle XML empty tags and attributes
how to modify the length of one column in table and view concurrently?
Spooling in Oracle adds spaces to columns... how can I avoid it?
Redundant hash join in SQL developer's autotrace execution plan?
Sql Hierarchy query with two tables
Oracle ListaGG, Top 3 most frequent values, given in one column, grouped by ID
Having a table of contracts with activity periods, how do I calculate daily active contract counts?
Connection pooling is not reusing idle connections