How to combine multiple LineString rows into a single row collection

Question

I\'m using SQL Server 2008 and the Geometry datatype to store a list of UK a roads, which I\'ve imported from the Ordanance Survey STRATEGI data set.

Ea

Answer 1

In SQL 2012 you can use UnionAggregate

SELECT geometry::UnionAggregate(shape) FROM Table

or if you have a geography column

SELECT geography ::UnionAggregate(shape) FROM Table