11. The method of claim 7 , wherein the determining of the measure based on the relationships comprises: identifying the measure in the related tables based on data types of table columns and based on semantic words used in the tables; and calculating the measure using the relationships of the related tables.
7. A method for combining online transactional processing and online analytical processing in an in-memory database, comprising: retrieving two or more tables from an online transaction processing system; identifying related tables among the two or more tables; determining, by a hardware processor, relationships between the related tables, wherein determining the relationships comprises analyzing metadata of the related tables; determining a measure based on the relationships; and outputting the measure.