JSON
BigQuery
Db2 (LUW)
MariaDB
MySQL
Oracle DB
PostgreSQL
SQL Server
SQLite
2013
2015
2017
2019
2021
⊘ 3.5.7 - 3.43.0
a
⊘ 2008R2 - 2022
a
⚠ 16
⊘ 8.3 - 15
✓ 12cR2 - 21c
⚠ 12cR1
⊘ 11gR1 - 11gR2
b
⚠ 8.0.16 - 8.0.34
⊘ 8.0.12 - 8.0.14
⚠ 8.0.11
⊘ 5.0 - 5.7
a
⚠ 10.5 - 10.11
⊘ 5.1 - 10.4
a
⚠ 11.5.0 - 11.5.8
⊘ 9.7 - 11.1
⊘ 2.0
⊘ 2.0
Some functions conform (by “coincidence”)
Some minor omissions