Acronym for Structured Query Language. A syntax for retrieving and manipulating data from a relational database.

learn more… | top users | synonyms

0
votes
1answer
84 views

Issues with pgrouting workshop code in postgis 2.11/pgrouting 2.0

I'm having issues getting the pgrouting workshop to work on Postgresql 9.2/PostGIS 2.11 and pgrouting 2.0 on windows. How can I rewrite the following php/sql code and make it compatible with my ...
0
votes
1answer
103 views

Create Area or Polygon based upon a Series of points

i have a large list of points that i would like to merge to create an Polygon based upon an attribute. Essentially an area that encompasses all points. x | y | attr ____________________ 1 | ...
4
votes
1answer
668 views

ArcMAP SQL Statement Iterate Feature Selection 'IN' 'BY' 'IS' - escape character

We have a problem when selecting Features from a Feature Class in ArcMAP 10.2 using the Iterate Feature Selection tool in Model builder Our dataset has a Attribute Field with two character codes like ...
4
votes
1answer
1k views

Edit SQL Server table (not registered with geodatabase) with arcpy

I am trying to update some rows in a SQL Server database table (not registered with geodatabase) with arcpy.da.UpdateCursor. However, when running the deleteRow(), I get the error return without ...
1
vote
1answer
70 views

Using Like on Join Field

Ok, so this has probably been asked by someone else out there somewhere but I can't find it via google or this stack, so... I've got two tables from an SDE database (SQLServer Express 2008 r2) that ...
1
vote
2answers
343 views

sqlite version error with ogr2ogr

I am trying to randomly select some points from a shape file using ogr2ogr and an SQL query via sqlite but it seems to baulk at the sqlite version: ogr2ogr -sql "SELECT * FROM probe_2004to2012 WHERE ...
1
vote
1answer
129 views

Wrong output wth group by and aggregate function in spatialite

I have a grid and for every cell I want to set the column "landuse" according to the largest intersecting polygon. SELECT grid.PKUID, landuse.landuse, MAX(AREA(INTERSECTION(grid.Geometry,...
0
votes
0answers
665 views

Date Parameter in model builder - ArcMap

Basically I'm building a model where the user has to select the data from a drop down list and the result is executed. I have a problem when trying to pass a date as a parameter. Below you can find ...
2
votes
2answers
2k views

CartoDB- Passing selected features bounds to map center parameter (Zoom to selected features)

Looking to build a light-weight viewer for some data we have hosted on CartoDB. I'm looking to have a user input their address into an input, pass a query to CartoDB and have the map zoom/pan to the ...
1
vote
1answer
3k views

Postgresql Trigger to insert records in my table from another one

I spent few days trying to resolve this question but it was impossible. I have two tables: Table1. CREATE TABLE point ( id_point integer NOT NULL DEFAULT, layer text, elevation numeric, ...
0
votes
1answer
51 views

Could SQL performance be increased by storing rotations of the data?

I'm working on a project where this kind of SQL Psuedocode would apply: SELECT * FROM objects WHERE (distance My inputs are latitude and longitude, and my database holds latitude and longitude. ...
3
votes
1answer
111 views

New attribute creation using ogr and regex

I've got a folder full of dxf files with elevation values included as part of a long text attribute. I've written a regex expression to extract the elevation value, and would like to add it as a new ...
2
votes
1answer
1k views

Postgis: find geometry within multiple polygons

I've got two tables with geometry in it. Table 1:items holds items with a point geometry; while the second table property_zones holds polygons. The Items: CREATE TABLE public.items ( id integer ...
4
votes
1answer
332 views

How to query nearest date in ArcGIS Server REST?

How to query nearest date (today) in ArcGIS Server REST? Table: ID NAME DATA 1 test 2013-06-01 13:00:00 2 test1 2013-06-01 16:00:00 3 test2 2013-...
6
votes
1answer
1k views

ogr2ogr selecting features by attributes

I am writing a shapefile after some processing; however, in the final step I need to do some selection by attributes from the the shapefile. I am using the command in a shell with the aim of using it ...
4
votes
3answers
798 views

Maximum length of WHERE clause with IN statement

I need to get all features from feature class where their field value matches to input array. To achive this one may set IQueryFilter.WhereClause property similar to 'FIELD_NAME IN (array[0], array[1],...
2
votes
1answer
401 views

How to Buffer based on SQL expression?

Is there any way to optimize this code? It creates two buffer feature classes based on two different fields in the shapefile attribute table import arcpy from arcpy import env ## Set Workspace env....
1
vote
0answers
65 views

Selecting a bounded area within a raster

I am new to postgresql. I have imported a 256kb sample raster (.tiff) into postgres with tilesize 100x100. Now I need to select the area (rectangle) from the center of the image using sql query. Then ...
2
votes
0answers
190 views

How can I retrieve/query data from shape file for forms/grid in website?

I've made a site using openlayers and geoserver. currently im serving WMS layers from geoserver (shape files). I want to add in my site a search form that the user can search for data (which I have in ...
3
votes
1answer
2k views

What expressions for QGIS field-calculator?

I do not understand what language I have to use in field-calculator and labels on QGIS: SQL or Python? And where I can find the possible script/expressions to use? in the image you can see the ...
2
votes
2answers
676 views

What is faster for geoprocessing (intersect) big shapefiles?

I have 200 Mb shapefiles of polylines downloaded from OSM. I've been working with QGIS 2.0 in Ubuntu 64 Bit 8 Gb RAM to make some geoprocessing tasks and it's taking 2 days for processing. Once I've ...
1
vote
3answers
419 views

Differences between SQL dialects in QGIS vs ArcView vs Oracle

I'm kinda new with SQL queries and there is something I don't get: A SQL query in QGIS is written differently than the same query in ArcView and will probably also be written differently if I want to ...
3
votes
1answer
1k views

How to use GROUP BY with arcpy.da.SearchCursor in file geodatabase?

fc = "C:\Users\AuxS3-4\Documents\ArcGIS/Default.gdb\Malla" fields = ('OBJECTID','Sentido','Carriles','idMalla') sqlclause=(None, "GROUP BY Sentido") cursor = arcpy.da.SearchCursor(fc, fields,...
2
votes
1answer
588 views

How to split polygons with another polygon and inheritage data?

Let's say that we have two tables with polygons representing areas. Table A and Table B. Geometries from table A represents both the valid and invalid areas. And the geometries in table B represents ...
1
vote
1answer
2k views

SQL to get points within a certain distance

I am new to using spatial data types in sql server. I have managed to create a column of Approx 50,0000 geometry points (from x,y data) and would like to find out which (count number of) points are ...
1
vote
1answer
626 views

Multiple input shapefiles for ogr2ogr sqlite spatial operations

I'm running up against an issue doing a spatial operation requiring multiple input shapefiles using ogr2ogr and sqlite. I have: ogr2ogr -f "ESRI Shapefile" output.shp input.shp -dialect sqlite -sql "...
1
vote
1answer
531 views

Using sql SELECT DISTINCT in Fusion Tables API

How do I go about using sql SELECT DISTINCT in fusion tables API?
2
votes
2answers
530 views

Trying to use Python code and user defined inline parameters to build a SQL expression

I am trying to build a tool where the end user can run a model and make a selection from a feature class based on 3 different fields, calculate the total shape length, & export the results to a ...
2
votes
2answers
3k views

Select layer by attribute using SQL statement LEN() in ArcMap

as the title already suggests... I want to query the length of a string column and thought to use: LEN([ColumnName]) > 5 However, that doesn't work at all. I'm querying a table in a fGDB in ArcMap ...
1
vote
1answer
1k views

Subquery a list in select layer by attribute management using python

I am new to python and having trouble with my script. I want only the records from the COMTRS field (of the pur_dbf_view) that match values from the ComtrsList to be selected; however, I am getting ...
1
vote
1answer
287 views

Mapinfo SQL Query for compare for edited data in tables

I have a table that contain several columns, each has their own data. then, someone have made some change in the data (just a little one data editing). how do i know later what data have been edited/...
3
votes
1answer
419 views

Triggers for delta tables

I have been facing an issue to capture the delta updates on SDE. We have written triggers on A and D tables to capture the delta updates(to capture the version name based on state id's), however I ...
2
votes
1answer
242 views

Tiger geocoder / postgis - get county from point

Looking for some help with getting the county for a lat / lon. I have postgis / tiger geocoder installed and can reverse look up a point and get the addresses. I would like to get the county the ...
2
votes
1answer
139 views

How to select all tenth in a field? [duplicate]

I want to select all tenth in a field! :( I know this way; "Km" = 10 or "Km" = 20 ... and so, but I am pretty sure theres other way. I am not SQL literate, but with your help in this forums I have ...
1
vote
1answer
2k views

What is ArcGIS 10 definition query to select max value from table? [duplicate]

I want to select max date from may layer by below query in my Web GIS but I cannot. (SELECT MAX( GregorianDate ) FROM DrillingProgress WHERE Crew = 'c-Chabock')
3
votes
0answers
110 views

How to express not within/inside predicate in spatial database with good performance

In our application we want to express some spatial predicates as objects not within some areas, but unfortunately it has very bad performance. The following SQL is generated by our application: ...
1
vote
1answer
473 views

How can i save Shape file as sql script with ogr2ogr?

I have a some Shape files and i want to convert it into sql scripts. I know that ogr2ogr can put data into data base itself. But i want to have a sql script which can be executed and put data to DB. ...
1
vote
2answers
182 views

SQL: Select aggregated Bounding Box of multiple Features

I would like to calculate the aggregated bounding box of multiple features using OGC Simple Feature SQL or SQL API of ArcSDE. The following statement will only query the bounding box of each feature: ...
1
vote
1answer
408 views

Three table postgres sql join query

I'm having trouble getting my SQL query to work with three tables. I'm new to SQL to I've already spent considerable time trying to understand the documentation and making some sense of it. I'm using ...
1
vote
0answers
57 views

How do I make vectorlayer with sql on PostGis via python code

I need to make a vectorLayer and fill with the SQL's results on PostGIS via python code. I'm working with python 2.7, QGIS 1.8 and PyQt 4.5 How do I it ? thanks
0
votes
1answer
458 views

ArcGIS - Help Using Oracle Function in Definition Query - No ArcSDE

I have set up a Query Layer pointing at an Oracle table with a SDO.Geometry column, and that is working and behaving fine. However, when I am attempting to set up a definition query that calls a ...
1
vote
1answer
2k views

How do I write a MYSQL spatial query to find all polygons (rectangle) that contain any points in a table?

Something like: SELECT * from polygons WHERE bounds CONTAINS(SELECT geom_point from points) Can someone help me out with the syntax? Bounds will always be a rectangular polygon and everything is in ...
0
votes
1answer
118 views

Looping on the Select_analysis tool

Im trying to perform a loop on the Select_Analysis tool in Arcgis. Code looks like this: inputfile = open("locality.txt", 'r') # locality.txt is a txt file of locality names loc_list = [] for line in ...
2
votes
0answers
63 views

What is the MS SQL Spatial syntax for counting points within polygons? [duplicate]

All, What I'm trying to do is this: Count points within polygons There are thousands of points and maybe 2 dozen polygons Get a list back of the 2 dozen polygons by name and the count of points ...
1
vote
2answers
3k views

How to select all points within a circle in PostGIS?

I have set of points in a PostGIS Table (Type Geometry). Now, I need to filter points that lie in a circle with a center (C) and radius (R)! I expect C to be of type Point or Coordinates.. R to be ...
3
votes
1answer
838 views

How to create a search box and SQL statement for searching an attribute field?

How can I add a HTML search bar that the user can use to search an attribute field for a polygon layer, and then tie that input into the SQL statement? So far I am able to hard code the query of ...
2
votes
2answers
2k views

How to convert Geometry type column to degree Minutes Second in SQL Server 2008 R2

I have shape column of type geometry and I want to convert X and Y coordinates into Degree Minutes Second format using SQL query and i am using sql server 2008 R2. Currently I got Lat and long using ...
2
votes
1answer
891 views

Trouble formatting SQL expression for where clause in “Search layer by attribute” arcpy function

I am trying to pass a variable into a where clause in the "Search Layer by Attribute" arcpy function. I cannot seem to figure out the correct format for the SQL expression so that the function reads ...
2
votes
2answers
3k views

Merge lines with the same 'name' attribute on QGIS?

I have a shapefile with a few thousand lines, each is a street segment. I'd like to merge all features with the same 'streetName' attribute into a single attribute. I only really care about the name ...
7
votes
2answers
2k views

Change polygon “handedness” for SQL 2008

I have a few hundred shapes (polygons and multipolygons) each consisting of tens of thousands of points that I am trying to get into SQL 2008. Unfortunately, the shapes I have tried to import are "...