sql server - Joining multiple tables to one table in sql -
i have rather complex (well me) sql query happening , having trouble concepts.
i have following sql on webpage building
select [dbo].[enrolment].[_identity], [dbo].[enrolment].commencementdate, [dbo].[enrolment].completiondate, [dbo].[enrolment].enrolmentdate, [dbo].[course].name coursename, [dbo].[course].identifier qualcode, [dbo].[person].givenname, [dbo].[person].surname,[dbo].[employer].name empname, [dbo].[employer].address1,[dbo].[employer].suburb,[dbo].[employer].phone, [dbo].[employer].postcode,[dbo].[enrolmentstatus].name enrolname, [dbo].[student].identifier,[dbo].[student].person,[dbo].[contact].person contactid (((([dbo].[enrolment] left join [dbo].[course] on [dbo].[enrolment].course = [dbo].[course].[_identity]) left join [dbo].[employer] on [dbo].[enrolment].employer = [dbo].[employer].[_identity]) left join [dbo].[enrolmentstatus] on [dbo].[enrolment].status = [dbo].[enrolmentstatus].[_identity]) left join [dbo].[student] on [dbo].[enrolment].student = [dbo].[student].[_identity]) left join [dbo].[person] on [dbo].[student].person = [dbo].[person].[_identity] left join [dbo].[contact] on [dbo].[employer].[_identity] = [dbo].[contact].employer (([dbo].[enrolmentstatus].name) = 'training' or ([dbo].[enrolmentstatus].name) = 'enrolled') this working fine join [dbo].[person] table again time joining table code need patch above statement is
left join [dbo].[trainer] on [dbo].[enrolment].trainer = [dbo].[trainer].[_identity]) left join [dbo].[person] on [dbo].[trainer].person = [dbo].[person].[_identity] i need able person table name of student , name of trainer, need 2 records person table every record enrolment table, fields need person table same both trainer , student in trying given name , surname both.
any or pointers appreciated.
use aliasing this..
left join [dbo].[trainer] on [dbo].[enrolment].trainer = [dbo].[trainer].[_identity]) left join [dbo].[person] p on [dbo].[trainer].person = p.[_identity]
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