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basicconfiguration
Constraint Violating Yak Guru
358 Posts |
 Posted - 2012-09-28 : 13:45:54
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| declare @computer table (computerid int, computermodel varchar(20))declare @user table (userid int, computerid int)insert @computer select 1, 'xx' union allselect 1, 'yy' union allselect 1, 'zz' insert @userselect 1, 1 union allselect 2, 2select c.computerid, c.computermodel, u.userid from @computer cjoin @user u on u.computerid = c.computeridselect c.computerid, c.computermodel, u.userid from @computer cjoin @user u on c.computerid = u.computeridgetting a little bit curious about how to use the columns when using a join. I dont know which columns to use first to gain the best performance when doing a join.I checked the execution plan and both gives me the same execution plan. therefore, I think it doesn't matter the order of the columns in the join. Am i right? |
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tkizer
Almighty SQL Goddess
38200 Posts |
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joins question