Multiple SQL Queries in a Stored Procedure.

admin — Thu, 18 Dec 2008 21:21:40 +0000

Working on a Thursday afternoon, I came across a problem where we had to return multiple counts (about 10 of them ) in an application. One way was to have multiple stored procedures and call them one by one, but this would mean I would have to make 10 connections to the database and 10 opens , 10 closes, phew !

So I decided to combine all of them into one:

SELECT "totaltrees" =(SELECT count(*) FROM Forest f WHERE f.trees= @forestId), "totalplants" =(SELECT count(*) FROM Forest f WHERE f.plants= @forestId), "totalUsers"=(SELECT count(*) FROM Users u WHERE u.groupId= @groupId)

Here you can add as many as queries you want and from different tables, counts, columns etc. Just one thing, The result of each query should have a unique value, thus you can’t do select * !!

Or something like: select country_name FROM world.

cool ! isn’t it ?

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Multiple SQL Queries in a Stored Procedure.