Difference between Geometry & Polygon functions- SQL Server











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Studying for the 70-461 and my book (Joes2pro Vol3) makes no mention of a difference between STGeomFromText & STPolyFromText functions, though it reads like there is a discernible difference between the two.



Examples asked to run are here



Select Geometry::STGeomFromText('Polygon ((0 0, 28 0, 28 21, 0 21, 0 0))',0)

Select Geometry::STPolyFromText('Polygon ((0 0, 28 0, 28 21, 0 21, 0 0))',0)


Which gives me exactly the same output and Microsoft docs is a little light on the subject for both these functions. All I can screen out is one is a geometry instance and the other is a geometryPolygon instance ?



Can anyone tell me when one is used over the other and what the above actually means ?



Kind regards,



SQLBoffin.










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    up vote
    0
    down vote

    favorite












    Studying for the 70-461 and my book (Joes2pro Vol3) makes no mention of a difference between STGeomFromText & STPolyFromText functions, though it reads like there is a discernible difference between the two.



    Examples asked to run are here



    Select Geometry::STGeomFromText('Polygon ((0 0, 28 0, 28 21, 0 21, 0 0))',0)

    Select Geometry::STPolyFromText('Polygon ((0 0, 28 0, 28 21, 0 21, 0 0))',0)


    Which gives me exactly the same output and Microsoft docs is a little light on the subject for both these functions. All I can screen out is one is a geometry instance and the other is a geometryPolygon instance ?



    Can anyone tell me when one is used over the other and what the above actually means ?



    Kind regards,



    SQLBoffin.










    share|improve this question


























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      Studying for the 70-461 and my book (Joes2pro Vol3) makes no mention of a difference between STGeomFromText & STPolyFromText functions, though it reads like there is a discernible difference between the two.



      Examples asked to run are here



      Select Geometry::STGeomFromText('Polygon ((0 0, 28 0, 28 21, 0 21, 0 0))',0)

      Select Geometry::STPolyFromText('Polygon ((0 0, 28 0, 28 21, 0 21, 0 0))',0)


      Which gives me exactly the same output and Microsoft docs is a little light on the subject for both these functions. All I can screen out is one is a geometry instance and the other is a geometryPolygon instance ?



      Can anyone tell me when one is used over the other and what the above actually means ?



      Kind regards,



      SQLBoffin.










      share|improve this question















      Studying for the 70-461 and my book (Joes2pro Vol3) makes no mention of a difference between STGeomFromText & STPolyFromText functions, though it reads like there is a discernible difference between the two.



      Examples asked to run are here



      Select Geometry::STGeomFromText('Polygon ((0 0, 28 0, 28 21, 0 21, 0 0))',0)

      Select Geometry::STPolyFromText('Polygon ((0 0, 28 0, 28 21, 0 21, 0 0))',0)


      Which gives me exactly the same output and Microsoft docs is a little light on the subject for both these functions. All I can screen out is one is a geometry instance and the other is a geometryPolygon instance ?



      Can anyone tell me when one is used over the other and what the above actually means ?



      Kind regards,



      SQLBoffin.







      sql sql-server






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      edited Nov 22 at 19:56









      jarlh

      28.2k52137




      28.2k52137










      asked Nov 22 at 16:14









      SQLBoffin

      12




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          STGeomFromText() will take the WKT for any type of geometry (polygons of course but also points and lines) whereas STPolyFromText() will only do polygons.






          share|improve this answer





















          • Great thanks for your response. So really the STGeomFromText() function is basically just the combination of the STPointFromText(), STLineFromText() and STPolyFromText(). For some reason I was expecting the answer to be more complicated but ill take it. Cheers
            – SQLBoffin
            Nov 23 at 12:56













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          up vote
          0
          down vote













          STGeomFromText() will take the WKT for any type of geometry (polygons of course but also points and lines) whereas STPolyFromText() will only do polygons.






          share|improve this answer





















          • Great thanks for your response. So really the STGeomFromText() function is basically just the combination of the STPointFromText(), STLineFromText() and STPolyFromText(). For some reason I was expecting the answer to be more complicated but ill take it. Cheers
            – SQLBoffin
            Nov 23 at 12:56

















          up vote
          0
          down vote













          STGeomFromText() will take the WKT for any type of geometry (polygons of course but also points and lines) whereas STPolyFromText() will only do polygons.






          share|improve this answer





















          • Great thanks for your response. So really the STGeomFromText() function is basically just the combination of the STPointFromText(), STLineFromText() and STPolyFromText(). For some reason I was expecting the answer to be more complicated but ill take it. Cheers
            – SQLBoffin
            Nov 23 at 12:56















          up vote
          0
          down vote










          up vote
          0
          down vote









          STGeomFromText() will take the WKT for any type of geometry (polygons of course but also points and lines) whereas STPolyFromText() will only do polygons.






          share|improve this answer












          STGeomFromText() will take the WKT for any type of geometry (polygons of course but also points and lines) whereas STPolyFromText() will only do polygons.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 22 at 22:40









          Ben Thul

          22.1k32445




          22.1k32445












          • Great thanks for your response. So really the STGeomFromText() function is basically just the combination of the STPointFromText(), STLineFromText() and STPolyFromText(). For some reason I was expecting the answer to be more complicated but ill take it. Cheers
            – SQLBoffin
            Nov 23 at 12:56




















          • Great thanks for your response. So really the STGeomFromText() function is basically just the combination of the STPointFromText(), STLineFromText() and STPolyFromText(). For some reason I was expecting the answer to be more complicated but ill take it. Cheers
            – SQLBoffin
            Nov 23 at 12:56


















          Great thanks for your response. So really the STGeomFromText() function is basically just the combination of the STPointFromText(), STLineFromText() and STPolyFromText(). For some reason I was expecting the answer to be more complicated but ill take it. Cheers
          – SQLBoffin
          Nov 23 at 12:56






          Great thanks for your response. So really the STGeomFromText() function is basically just the combination of the STPointFromText(), STLineFromText() and STPolyFromText(). For some reason I was expecting the answer to be more complicated but ill take it. Cheers
          – SQLBoffin
          Nov 23 at 12:56




















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