A solution to the problem of SQLR

Source: Internet
Author: User

Create table ta (   name    varchar)  ,    Subject varchar ( ,   result  int) Insert into ta (Name ,  subject , result)  values (' Zhang San '  ,  ' language '  , 74) Insert into ta ( Name , subject , result)  values (' Zhang San '  ,  ' math '  , 83) insert into  ta (Name , subject , result)  values (' Zhang San '  ,  ' physical '  , 93) insert  into ta (Name , subject , result)  values (' John Doe '  ,  ' languages '  ,  Insert into ta (Name , subject , result)  values (' John Doe '  ,  ' mathematics ')  , 84) Insert into ta (name , subject , result)  values (' John Doe '     ' physical '  , 94) goselect * from ta--static SQL, refers to subject only language, mathematics, physics, this course. select name  name,   max (case subject when  ' language '  then result else 0 end)   language,   max ( case subject when  ' math '  then result else 0 end)   math,   max (case subject when  ' physical '  then result else 0 end)   physical from  tagroup by name--dynamic SQL, refers to subject more than language, mathematics, physics, this course. declare  @sql  varchar (8000) set  @sql  =  ' select name as  '  +  ' name ' select  @sql  =  @sql  +  '  , max (case subject when  '  +  Subject +  '  then result else 0 end '  ['  + subject  +  ' from  (select distinct subject from ta)  as aset  @sql  =  @sql  +  '  from ta group by name ' EXEC (@sql)


A solution to the problem of SQLR

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