STLineFromWKB (geometry Data Type)
Applies to: 
SQL Server
Azure SQL Database
Azure SQL Managed Instance
Returns a geometryLineString instance from an Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation.
Syntax
STLineFromWKB ( 'WKB_linestring' , SRID )
Arguments
WKB_linestring
Is the WKB representation of the geometryLineString instance you wish to return. WKB_linestring is a varbinary(max) expression.
SRID
Is an int expression representing the spatial reference ID (SRID) of the geometryLineString instance you wish to return.
Return Types
SQL Server return type: geometry
CLR return type: SqlGeometry
OGC type: LineString
Remarks
This method will throw a FormatException if the input is not well-formatted.
Examples
The following example uses STLineFromWKB() to create a geometry instance.
DECLARE @g geometry;
SET @g = geometry::STLineFromWKB(0x0102000000020000000000000000005940000000000000594000000000000069400000000000006940, 0);
SELECT @g.STAsText();