RTQP Engine E-R modelSave PDFSave selected topicSave selected topic and subtopicsSave all topicsShareShare to emailCopy topic URLLast UpdatedSep 29, 20221 minute readPI SystemPI SQL Data Access Server (RTQP Engine) 2023 SP1Developer The following E-R models reflect how various PI System data is represented with tables. Related LinksCategoryElement schemaEventFrame schemaUnitOfMeasure schemaView the E-R model in PI SQL Commander Lite