Oracle DBA (*)

Progr (*)

Postgres (*)

Level 1 (*)

Level 2 (*)

Level 3 (*)

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Dec 2022				X			X
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Dec 2021			X				X
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Gen 2021		X	X				X

Dec 2020			X				X
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Dec 2019				X				X
Nov 2019			X	X				X
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Jul 2019				X			X
Jun 2019				X			X
May 2019				X		X
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Mar 2019				X			X
Feb 2019			X	X		X
Jan 2019				X			X

Dec 2018			X	X			X
Nov 2018				X			X
Oct 2018				X			X
Sep 2018				X			X
Aug 2018				X		X
Jul 2018				X		X
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Feb 2018		X	X			X
Jan 2018		X					X

(*)
Level:
1: easy solution
2: medium solution
3: hard (or long) solution

Topic:
DBA: quiz usually suitable for Oracle DBAs
Progr: quiz usually suitable for PL/SQL or SQL Programmers
DBA/Progr: quiz suitable for DBAs and for Programmers
Postgres: regarding the Postgresql database