SAP HANA Articles - Page 23 of 63

In SAP HANA, Data modeling can only be performed on Column store tables. You can’t select Row store tables while create data modeling views on top of HANA database. In below pic, you can see it only shows all column store tables to add in Data Foundation layer of a Modeling view.

When you have to run an OLAP query that perform sum of Sales in table with where clause in Country=’US’.Select Sum(Sales) from FCT_SALES where Country=’US’; It storage type is a column based storage in memory cells all the values for Sales will come together in database and when an aggregation ‘Sum’ is performed it will be much faster as compared to an OLTP query.If table is row based storage with values are stored with different data types coming together and a ‘Sum’ aggregation is performed, it will too tough to find values for ‘Sales’ column.In graph, column based tables show the ... Read More

When you have to run an OLTP query just to display the specific records, In row based storage, when you run a Select statement all the different datatypes come together so it will be much faster to run a SELECT statement in Row based storage.Select * from FCT_SALES where Country=’US’;When the same query is run in column based storage, you need to find the values of each column in database and it is time consuming so it is not recommended to create a column based storage tables when your queries are not aggregated and required to run simple SELECT statement.Read More

In a general scenario, it is advisable to store the table as Column store when you have to run complex OLAP queries. OLAP queries include complex calculations and different SQL aggregation functions are used in the query.Select Sum(Sales) from table_name where Column1=’ABC’; Aggregate Functions include −Sum() - returns the sum of the numeric values in a given columnMax() - returns the maximum of the numeric values in a given columnMin() - returns the minimum of the numeric values in a given columnAverage() - returns the average of the numeric values in a given columnPercent() - returns the percentage of the numeric ... Read More

In SAP HANA Studio, you can check the table type from table symbol under Schema. In below snapshot you can see the different symbol for row table and a column table.TEST_Row − Row store table.SHOPFACT − Column store tableTo change the table type, you can use alter table command.Alter table column table_name;

From the below table you can match SAP HANA Revision/Version with Release details −

Other option to check the version of SAP HANA database-Select * from "SYS"."M_DATABASE";Go to SQL editor and run the above command.Go to Result tab and you can see the version of your SAP HANA system.

In SAP HANA Studio, select HANA system and right click. Select last option Properties from the list as below −In Properties window, navigate to Version history and you can see the version of your SAP HANA system.

You can define this under Configure → Configure Check Thresholds. You have an option to define Low, Medium and High values for these parameters.

You can configure SMTP in Alerts tab under SAP HANA Administration. Click on Configure button and you need to enter the below information −Sender EmailSMTP serverSMTP PortRecipient email