(so you can share it with friends and colleagues):
postgresql edition:
1) https://t.me/nosingularity/535 (ru)
2) https://t.me/nosingularity/541 (ru)
3) https://t.me/nosingularity/548 (ru)
4) https://t.me/nosingularity/572 (ru)
snowflake edition:
5) https://t.me/nosingularity/582 (ru)
6) https://t.me/nosingularity/602 (ru)
7) https://t.me/nosingularity/753 (ru) + https://t.me/nosingularity/754 (ru)
8) https://t.me/nosingularity/762 (ru)
9) https://t.me/nosingularity/826 (ru)
mix:
10) https://t.me/nosingularity/755 (ru)
11) https://t.me/nosingularity/803 (ru) + https://t.me/nosingularity/804 (ru)
12) https://t.me/nosingularity/808 (ru) + https://t.me/nosingularity/809 (ru)
13) https://t.me/nosingularity/857 (ru)
14) https://t.me/nosingularity/1024 (en)