Comments on: How does SQL JOIN clause works: Part –I (a little bit theoretical?) http://mhjewel.wordpress.com/2008/02/04/how-does-sql-join-clause-works-part-%e2%80%93i-a-little-bit-theoretical/ Tue, 13 Oct 2009 16:29:15 +0000 http://wordpress.com/ hourly 1 By: gany http://mhjewel.wordpress.com/2008/02/04/how-does-sql-join-clause-works-part-%e2%80%93i-a-little-bit-theoretical/#comment-85 gany Wed, 22 Jul 2009 07:42:23 +0000 http://mhjewel.wordpress.com/?p=18#comment-85 nice one, but need a little bit more on cross join nice one, but need a little bit more on cross join

]]> By: nate http://mhjewel.wordpress.com/2008/02/04/how-does-sql-join-clause-works-part-%e2%80%93i-a-little-bit-theoretical/#comment-44 nate Mon, 07 Jul 2008 20:55:30 +0000 http://mhjewel.wordpress.com/?p=18#comment-44 is there such a thing as an implicit left outer join? that is, mimic a left outer join using only where clause? is there such a thing as an implicit left outer join? that is, mimic a left outer join using only where clause?

]]> By: Matthew http://mhjewel.wordpress.com/2008/02/04/how-does-sql-join-clause-works-part-%e2%80%93i-a-little-bit-theoretical/#comment-41 Matthew Wed, 30 Apr 2008 19:23:33 +0000 http://mhjewel.wordpress.com/?p=18#comment-41 This is nicely laid out, which I appreciate. I was going to post a question here, but I figured it out. How to outer join more than one table: SELECT DISTINCT main_table.*, first_table.a_field, second_table.a_field FROM main_table LEFT OUTER JOIN first_table ON (join condition) LEFT OUTER JOIN second_table ON (join condition 2), next_table, next_next_table, etc. This didn't seem to work for me. This is nicely laid out, which I appreciate.
I was going to post a question here, but I figured it out.
How to outer join more than one table:

SELECT DISTINCT main_table.*, first_table.a_field, second_table.a_field
FROM main_table
LEFT OUTER JOIN first_table
ON (join condition)
LEFT OUTER JOIN second_table
ON (join condition 2),
next_table,
next_next_table, etc.

This didn’t seem to work for me.

]]> By: ganesh http://mhjewel.wordpress.com/2008/02/04/how-does-sql-join-clause-works-part-%e2%80%93i-a-little-bit-theoretical/#comment-39 ganesh Tue, 08 Apr 2008 10:48:17 +0000 http://mhjewel.wordpress.com/?p=18#comment-39 Need more information regarding Joins with Practical Examples. Need more information regarding Joins with Practical Examples.

]]> By: Leandro http://mhjewel.wordpress.com/2008/02/04/how-does-sql-join-clause-works-part-%e2%80%93i-a-little-bit-theoretical/#comment-34 Leandro Tue, 12 Feb 2008 14:46:55 +0000 http://mhjewel.wordpress.com/?p=18#comment-34 Nice tut. I was looking for how the db engine handles it and what's better for wich cases. "JOIN ON(tableA.id=tableB.id)" or a regular select with "Where (tableA.id=tableB.id)" Nice tut. I was looking for how the db engine handles it and what’s better for wich cases.
“JOIN ON(tableA.id=tableB.id)” or a regular select with “Where (tableA.id=tableB.id)”

]]> By: Gopal http://mhjewel.wordpress.com/2008/02/04/how-does-sql-join-clause-works-part-%e2%80%93i-a-little-bit-theoretical/#comment-33 Gopal Fri, 08 Feb 2008 18:12:22 +0000 http://mhjewel.wordpress.com/?p=18#comment-33 good understanding & knowlegible good understanding & knowlegible

]]> By: Gopal http://mhjewel.wordpress.com/2008/02/04/how-does-sql-join-clause-works-part-%e2%80%93i-a-little-bit-theoretical/#comment-32 Gopal Fri, 08 Feb 2008 18:11:09 +0000 http://mhjewel.wordpress.com/?p=18#comment-32 very good tutorial a good understanding very good tutorial a good understanding

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