Difference between revisions of "Technical Notes"
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+ | ==SQL== | ||
*Query to find <b>trap_id</b>'s in the <b>trap_routes</b> table which are unmatched in the <b>trap</b> table: | *Query to find <b>trap_id</b>'s in the <b>trap_routes</b> table which are unmatched in the <b>trap</b> table: | ||
SELECT | SELECT |
Revision as of 01:49, 9 March 2008
SQL
- Query to find trap_id's in the trap_routes table which are unmatched in the trap table:
SELECT trap_routes.trap_id, trap.trap_id FROM trap_routes LEFT JOIN trap ON trap_routes.trap_id = trap.trap_id WHERE trap.trap_ID IS NULL
- Query to update trap table using values from trap_routes table:
UPDATE trap, trap_routes SET trap.trap_route=trap_routes.trap_route, trap.trap_route_sequence=trap_routes.trap_route_sequence WHERE trap.trap_id=trap_routes.trap_id
- Query to add extra column with observation_date format as m/d/Y:
SELECT *,DATE_FORMAT(observation_date,'%m/%d/%Y') AS US_observation_date FROM crb_observations;
R scripts
# this R script reads a shapefile and exports it to a csv text file library(maptools) x<-readShapePoints(file.choose()) write.csv(x,"temp.csv",row.names=F)