Selecting all values with by using SelectLayerByAttribute_management with input Parameter
2
I am trying to select all values with Null by using the SelectLayerByAttribute_management. But the Fieldname in the where-clause is alterable by using the input-parameter.
That is what i tried:
if inputValue == "Null":
ap.SelectLayerByAttribute_management(inputFeature,"NEW_SELECTION", inputFieldname +"IS NULL")
Does somebody have an idea what I did wrong?
That's the error message i get:
ExecuteError: ERROR 000358: Invalid expression
Failed to execute (SelectLayerByAttribute).
arcpy select-by-attribute parameters null error-000358
edited 16 hours ago
PolyGeo♦
53.3k1779238
asked 16 hours ago
AndreasAndreas
183
add a comment |
2
I am trying to select all values with Null by using the SelectLayerByAttribute_management. But the Fieldname in the where-clause is alterable by using the input-parameter.
That is what i tried:
if inputValue == "Null":
ap.SelectLayerByAttribute_management(inputFeature,"NEW_SELECTION", inputFieldname +"IS NULL")
Does somebody have an idea what I did wrong?
That's the error message i get:
ExecuteError: ERROR 000358: Invalid expression
Failed to execute (SelectLayerByAttribute).
arcpy select-by-attribute parameters null error-000358
edited 16 hours ago
PolyGeo♦
53.3k1779238
asked 16 hours ago
AndreasAndreas
183
add a comment |
2
2
2
I am trying to select all values with Null by using the SelectLayerByAttribute_management. But the Fieldname in the where-clause is alterable by using the input-parameter.
That is what i tried:
if inputValue == "Null":
ap.SelectLayerByAttribute_management(inputFeature,"NEW_SELECTION", inputFieldname +"IS NULL")
Does somebody have an idea what I did wrong?
That's the error message i get:
ExecuteError: ERROR 000358: Invalid expression
Failed to execute (SelectLayerByAttribute).
arcpy select-by-attribute parameters null error-000358
edited 16 hours ago
PolyGeo♦
53.3k1779238
asked 16 hours ago
AndreasAndreas
183
I am trying to select all values with Null by using the SelectLayerByAttribute_management. But the Fieldname in the where-clause is alterable by using the input-parameter.
That is what i tried:
if inputValue == "Null":
ap.SelectLayerByAttribute_management(inputFeature,"NEW_SELECTION", inputFieldname +"IS NULL")
Does somebody have an idea what I did wrong?
That's the error message i get:
ExecuteError: ERROR 000358: Invalid expression
Failed to execute (SelectLayerByAttribute).
arcpy select-by-attribute parameters null error-000358
arcpy select-by-attribute parameters null error-000358
edited 16 hours ago
PolyGeo♦
53.3k1779238
asked 16 hours ago
AndreasAndreas
183
edited 16 hours ago
PolyGeo♦
53.3k1779238
asked 16 hours ago
AndreasAndreas
183
edited 16 hours ago
PolyGeo♦
53.3k1779238
edited 16 hours ago
PolyGeo♦
53.3k1779238
edited 16 hours ago
PolyGeo♦
53.3k1779238
53.3k1779238
asked 16 hours ago
AndreasAndreas
183
asked 16 hours ago
AndreasAndreas
183
asked 16 hours ago
AndreasAndreas
183
183
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
3
Use three quotes, AddFieldDelimiters and format:
sql = """{0} IS NULL""".format(arcpy.AddFieldDelimiters(datasource=inputFeature, field=inputFieldname))
ap.SelectLayerByAttribute_management(inputFeature,"NEW_SELECTION", sql)
answered 16 hours ago
BERABERA
15.1k52042
1
Thank you! Works perfect!
– Andreas
16 hours ago
@Andreas Nice! Please accept my answer with the checkbox
– BERA
16 hours ago
add a comment |
1
I think this should work:
sql = "{0} IS NULL".format(inputFieldname)
arcpy.SelectLayerByAttribute_management(inputFeature,"NEW_SELECTION", sql)
answered 16 hours ago
PolyGeo♦PolyGeo
53.3k1779238
I dont think it will with shape or fgdb input since they will need double quotes around the field name. UnlessinputFieldname = '"somefield"'
– BERA
16 hours ago
3
@BERA My understanding is that ArcGIS has been very forgiving on field delimiters for the last 3-4 dot releases. I cannot remember the last time that I used them in an SQL expression like this with either a file geodatabase or a shapefile.
– PolyGeo♦
16 hours ago
1
I Think you are correct. I just tried it and it does work without field delimiters.
– BERA
16 hours ago
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
3
Use three quotes, AddFieldDelimiters and format:
sql = """{0} IS NULL""".format(arcpy.AddFieldDelimiters(datasource=inputFeature, field=inputFieldname))
ap.SelectLayerByAttribute_management(inputFeature,"NEW_SELECTION", sql)
answered 16 hours ago
BERABERA
15.1k52042
1
Thank you! Works perfect!
– Andreas
16 hours ago
@Andreas Nice! Please accept my answer with the checkbox
– BERA
16 hours ago
add a comment |
3
Use three quotes, AddFieldDelimiters and format:
sql = """{0} IS NULL""".format(arcpy.AddFieldDelimiters(datasource=inputFeature, field=inputFieldname))
ap.SelectLayerByAttribute_management(inputFeature,"NEW_SELECTION", sql)
answered 16 hours ago
BERABERA
15.1k52042
1
Thank you! Works perfect!
– Andreas
16 hours ago
@Andreas Nice! Please accept my answer with the checkbox
– BERA
16 hours ago
add a comment |
3
3
3
Use three quotes, AddFieldDelimiters and format:
sql = """{0} IS NULL""".format(arcpy.AddFieldDelimiters(datasource=inputFeature, field=inputFieldname))
ap.SelectLayerByAttribute_management(inputFeature,"NEW_SELECTION", sql)
answered 16 hours ago
BERABERA
15.1k52042
Use three quotes, AddFieldDelimiters and format:
sql = """{0} IS NULL""".format(arcpy.AddFieldDelimiters(datasource=inputFeature, field=inputFieldname))
ap.SelectLayerByAttribute_management(inputFeature,"NEW_SELECTION", sql)
answered 16 hours ago
BERABERA
15.1k52042
answered 16 hours ago
BERABERA
15.1k52042
answered 16 hours ago
BERABERA
15.1k52042
answered 16 hours ago
BERABERA
15.1k52042
15.1k52042
1
Thank you! Works perfect!
– Andreas
16 hours ago
@Andreas Nice! Please accept my answer with the checkbox
– BERA
16 hours ago
add a comment |
1
Thank you! Works perfect!
– Andreas
16 hours ago
@Andreas Nice! Please accept my answer with the checkbox
– BERA
16 hours ago
1
1
Thank you! Works perfect!
– Andreas
16 hours ago
Thank you! Works perfect!
– Andreas
16 hours ago
@Andreas Nice! Please accept my answer with the checkbox
– BERA
16 hours ago
@Andreas Nice! Please accept my answer with the checkbox
– BERA
16 hours ago
add a comment |
1
I think this should work:
sql = "{0} IS NULL".format(inputFieldname)
arcpy.SelectLayerByAttribute_management(inputFeature,"NEW_SELECTION", sql)
answered 16 hours ago
PolyGeo♦PolyGeo
53.3k1779238
I dont think it will with shape or fgdb input since they will need double quotes around the field name. UnlessinputFieldname = '"somefield"'
– BERA
16 hours ago
3
@BERA My understanding is that ArcGIS has been very forgiving on field delimiters for the last 3-4 dot releases. I cannot remember the last time that I used them in an SQL expression like this with either a file geodatabase or a shapefile.
– PolyGeo♦
16 hours ago
1
I Think you are correct. I just tried it and it does work without field delimiters.
– BERA
16 hours ago
add a comment |
1
I think this should work:
sql = "{0} IS NULL".format(inputFieldname)
arcpy.SelectLayerByAttribute_management(inputFeature,"NEW_SELECTION", sql)
answered 16 hours ago
PolyGeo♦PolyGeo
53.3k1779238
I dont think it will with shape or fgdb input since they will need double quotes around the field name. UnlessinputFieldname = '"somefield"'
– BERA
16 hours ago
3
@BERA My understanding is that ArcGIS has been very forgiving on field delimiters for the last 3-4 dot releases. I cannot remember the last time that I used them in an SQL expression like this with either a file geodatabase or a shapefile.
– PolyGeo♦
16 hours ago
1
I Think you are correct. I just tried it and it does work without field delimiters.
– BERA
16 hours ago
add a comment |
1
1
1
I think this should work:
sql = "{0} IS NULL".format(inputFieldname)
arcpy.SelectLayerByAttribute_management(inputFeature,"NEW_SELECTION", sql)
answered 16 hours ago
PolyGeo♦PolyGeo
53.3k1779238
I think this should work:
sql = "{0} IS NULL".format(inputFieldname)
arcpy.SelectLayerByAttribute_management(inputFeature,"NEW_SELECTION", sql)
answered 16 hours ago
PolyGeo♦PolyGeo
53.3k1779238
answered 16 hours ago
PolyGeo♦PolyGeo
53.3k1779238
answered 16 hours ago
PolyGeo♦PolyGeo
53.3k1779238
answered 16 hours ago
PolyGeo♦PolyGeo
53.3k1779238
53.3k1779238
I dont think it will with shape or fgdb input since they will need double quotes around the field name. UnlessinputFieldname = '"somefield"'
– BERA
16 hours ago
3
@BERA My understanding is that ArcGIS has been very forgiving on field delimiters for the last 3-4 dot releases. I cannot remember the last time that I used them in an SQL expression like this with either a file geodatabase or a shapefile.
– PolyGeo♦
16 hours ago
1
I Think you are correct. I just tried it and it does work without field delimiters.
– BERA
16 hours ago
add a comment |
I dont think it will with shape or fgdb input since they will need double quotes around the field name. UnlessinputFieldname = '"somefield"'
– BERA
16 hours ago
3
@BERA My understanding is that ArcGIS has been very forgiving on field delimiters for the last 3-4 dot releases. I cannot remember the last time that I used them in an SQL expression like this with either a file geodatabase or a shapefile.
– PolyGeo♦
16 hours ago
1
I Think you are correct. I just tried it and it does work without field delimiters.
– BERA
16 hours ago
I dont think it will with shape or fgdb input since they will need double quotes around the field name. Unless
inputFieldname = '"somefield"'– BERA
16 hours ago
I dont think it will with shape or fgdb input since they will need double quotes around the field name. Unless
inputFieldname = '"somefield"'– BERA
16 hours ago
3
3
@BERA My understanding is that ArcGIS has been very forgiving on field delimiters for the last 3-4 dot releases. I cannot remember the last time that I used them in an SQL expression like this with either a file geodatabase or a shapefile.
– PolyGeo♦
16 hours ago
@BERA My understanding is that ArcGIS has been very forgiving on field delimiters for the last 3-4 dot releases. I cannot remember the last time that I used them in an SQL expression like this with either a file geodatabase or a shapefile.
– PolyGeo♦
16 hours ago
1
1
I Think you are correct. I just tried it and it does work without field delimiters.
– BERA
16 hours ago
I Think you are correct. I just tried it and it does work without field delimiters.
– BERA
16 hours ago
add a comment |
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