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0001 SQL Engines - Specifics
0002 -----------------------
0003 
0004 This document lists specifics among SQL engines. We need to remember about them when implementing features of KDb and designing KDbSQL.
0005 
0006 Legend: + == works, - == doesn't work, ? == not tested yet
0007 
0008 == 1. Ordering by computed column ==
0009 Examples: select rand() from T order by 1;
0010           select 1 from T order by 1;
0011 MySQL: +
0012 SQLite: -
0013 PostgreSQL: ?
0014 
0015 == 2. Using more than just "*" in the column list ==
0016 Example: select *, 1 from T;
0017 MySQL: -
0018 SQLite: +
0019 PostgreSQL: ?
0020 
0021 Notes: select T.*, 1 from T; works everywhere
0022