grid > source > query > unionSelect

A query can have zero or more unionSelect children.

The unionSelect element has no attributes.

It can contain all the configuration from the <select> attribute.

The specified select will be combined with the primary select configuration in a union select.

The type of the union select (UNION DISTINCT or UNION ALL) can be set with the unionSelectType attribute on the <query> element. If no unionSelectType is configured, the default UNION ALL is used.

Please refer to the grid > source > query > select documentation for more information on the allowed children elements.