.size()
on JSON object
BigQuery
Db2 (LUW)
MariaDB
MySQL
Oracle DB
PostgreSQL
SQL Server
SQLite
2013
2015
2017
2019
2021
⊘ 3.9.1 - 3.43.0
⊘ 2016 - 2022
✓ 12 - 16
✓ 21c+
a
⊘ 19c
a
✓ 18c
⊘ 12cR1 - 12cR2
⊘ 5.7 - 8.0.34
⊘ 10.2 - 10.11
⊘ 11.5.0 - 11.5.8
⊘ 2.0
Returns the number of keys, not 1