Memory error when executing UNION in SAP HANA

SQL UNION clause/operator is used to combine the results of two or more SELECT statements without returning any duplicate rows.

To use this UNION clause, each SELECT statement must have

select the same number of columns

the same number of column expressions

The same data type and

Have them in the same order

When performing a UNION, you need to pay attention to what data it will bring. To perform UNION ALL, you need to ensure that the view is fully materialized.

To know more about SAP HANA modeling, you can refer to the SAP Guide:

SAP HANA Guide

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