Sql ManualSql FunctionsScalar FunctionsSystem FunctionsCONNECTION_IDバージョン: 3.xこのページの見出しCONNECTION_IDDescription Get the connection number of the current sql client. Syntax SQLCONNECTION_ID() Return Value The connection number of the current sql client. Examples SQLselect connection_id(); TEXT+-----------------+| connection_id() |+-----------------+| 549 |+-----------------+