Updating with mercator

drop table t; drop table s; create table t (id number, name varchar2(32)); create table s (id number, name varchar2(32)); insert into t values (1,'1'); insert into t values (2,'2'); insert into t values (3,'3'); insert into t values (4,'4'); insert into t values (5,'5'); insert into s values (3,'three'); insert into s values (5,'five'); select * from t; update t set name = (select name from s where = s.id); select * from t; Our first table (t) simply has the numbers 1-5 in the 'id' and 'name' column but we want to update some of the names based on the contents of the second table (s) but this table only has values for two of the rows. 1 rows inserted 1 rows inserted 1 rows inserted 1 rows inserted 1 rows inserted 1 rows inserted 1 rows inserted ID NAME ---------------------- -------------------------------- 1 1 2 2 3 3 4 4 5 5 5 rows selected 5 rows updated ID NAME ---------------------- -------------------------------- 1 2 3 three 4 5 five 5 rows selected The problem here is that the update isn't a true 'join' as every row is going to be updated and if the 'join' fails then a null is written.This is OK so long as we can preserve the 'default' numeric values.

If installed (it is installed by default on Unix), it is possible to use EPSG numbers like this: The proj/nad/epsg file can be browsed and searched in a text editor for coordinate systems. PROJ.4 makes extensive use of sprintf() and atof() internally to translate numeric values.Qinetiq Mercator 1 is a joint British/Belgian remote sensing system utilising a modified version of the Qinetiq Zephyr High Altitude Long Endurance (HALE) unmanned aerial vehicle (UAV) as a platform.The reconnaissance pod was designed by the Belgian research institute VITO. The airplane is designed to provide remote sensing for flood management, disaster relief, fire spotting and environmental and agricultural monitoring. Doing a 'join update' in Oracle can sometime cause a few headaches.By 'join update' I mean the situation where we have two tables and want to update some of the rows in the first table based on values that exist in the second table.They wanted to do this in a seamless and responsive manner.And some of our customer datasets are fairly large.Also available is a semi-realistic view of dawn and dusk from far above the Earth, a look at the moon, and information about how this works.There is no simple single location to find all the required information. Post Script/PDF documents listed on the [ main] PROJ.4 page under documentation are the authoritative source but projections and options are spread over several documents in a form more related to their order of implementation than anything else.Note that both the frame and map latitude limits are set to 86 degrees north and south for the Mercator projection to maintain a safe distance from the singularity at the poles.An Application Programming Interface (API) is a set of routines, protocols, and tools for building software applications.

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