`information_schema.keywords.*`

show items implemented by

any at least two only one database all databases

relation	column	mysql	mariadb	tidb	postgres	cockroachdb	mssql
`keywords`
	`reserved`	`INT NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported
	`word`	`VARCHAR NULL`: 8	`VARCHAR NULL`: 10.2-10.5 `NULL`: 10.6-10.8	unsupported	unsupported	unsupported	unsupported