Difficulty in using a variable to pass a list of names between 2 tables

Question

Hi All,
I am trying to pass a list of names from one table as a variable to another table and trying to find the Highest level they exist at in the hierarchy. I am having some troubles with the variable and need some guidence and also if this should be a procedure or not.
this is what i have now :
Variable man_name Varchar;
exec :man_name = (Select full_name from direct_manager_report)
UPDATE direct_manager_report
Set Manager_level_number =
(Select 'Manager_Level_0' from manager_hierarchy where level_0_manager_name = man_name
UNION
Select 'Manager_Level_1' from manager_hierarchy where level_0_manager_name < > man_name AND level_1_manager_name = man_name
UNION
Select 'Manager_Level_2' from manager_hierarchy where level_1_manager_name < > man_name AND level_2_manager_name = man_name
UNION
Select 'Manager_Level_3' from manager_hierarchy where level_2_manager_name < > man_name AND level_3_manager_name = man_name
Where full_name = man_name;
Let me know what modifications have to be done for this the variable to get the name from table 1 and find the manager level from table 2 and populate it back in table 1.
Any help is appreciated.
Thanks

Answer 1

Frank Kulash wrote:
Hi,Thanks for your reply. I am sorry for not providing enough information.
What's wrong with what you have now? I want to pass the manager name (about 2000) from direct_manager_report to the variable which i pass to manager_hierarchy table to find the highest level for each manager
If it doesn't give the right results, then how is anyone except you to know what the right results are?
Variable man_name Varchar;
exec :man_name = (Select full_name from direct_manager_report)Does that really work for you?No thats why i said this is what i have and i am trying to see the best to past the list of manager names to get the level number.
UPDATE direct_manager_report
Set Manager_level_number =
(Select 'Manager_Level_0' from manager_hierarchy where level_0_manager_name = man_name
UNION
Select 'Manager_Level_1' from manager_hierarchy where level_0_manager_name < > man_name AND level_1_manager_name = man_nameIt looks like something is missing on the line above. Did you mean "level_0_manager_name != man_name"?
This site doesn't like to display the &lt;&gt; inequality operator. Always use the other (equivalent) inequality operator, !-, when posting here.
UNION
Select 'Manager_Level_2' from manager_hierarchy where level_1_manager_name < > man_name AND level_2_manager_name = man_name
UNION
Select 'Manager_Level_3' from manager_hierarchy where level_2_manager_name < > man_name AND level_3_manager_name = man_name
Where full_name = man_name;Are you sure the UNION will never return more than 1 row?
Let me know what modifications have to be done for this the variable to get the name from table 1 and find the manager level from table 2 and populate it back in table 1.Whenever you have a problem, post a little sample data (CREATE TABLE and INSERT statements) and the results you want from that data (in this case, the contents of table1 after everything is finished).
See the forum FAQ {message:id=9360002}Sorry did not realize the missing !. Yes the union will always return one record for each manager name passed. I have tested the select part which hard coding the manager name and it does update the level number correctly. but i am struggling with passing a large list of values as a variable.
This is the output i am looking for in the direct manager report table is :
Manager Name | Manager Level Number
ABC Manager Level 0
XYZ Manager Level 1
This is the structure of the manager hierarchy:
Manager Level 0 Manager Level 1 Manager Level 2...Manager Level 14
ABC ABC ABC ABC
ABC XYZ XYZ XYZ
Let me try the below but hopefully i am more clear on the requirement now.
>
You may want something like this
MERGE INTO  direct_manager_report     dst
USING   (
         SELECT    dmr.full_name
         ,           'Manager_Level_'
                || MIN ( CASE  dmr.full_name
                             WHEN  level_0_manager_name  THEN '0'
                             WHEN  level_1_manager_name  THEN '1'
                             WHEN  level_2_manager_name  THEN '2'
                             WHEN  level_3_manager_name  THEN '3'
                           END
                 ) AS manager_level_number
         FROM      manager_hierarchy  dmr
         JOIN      manager_hierarchy      mh   ON   dmr.full_name IN ( level_0_manager_name
                                                               , level_1_manager_name
                                            , level_2_manager_name
                                            , level_3_manager_name
         GROUP BY  dmr.full_name
     )                    src
ON     ( dst.full_name  = src.full_name )
WHEN MATCHED THEN UPDATE
SET     dst.manager_level_number = src.manager_level_number
Edited by: user599926 on Jun 4, 2013 9:41 PM