Question

MS SQL Help (Join table)

Asked by: acwng

Please help me to think of a SQL(s) to help joining the data in table_a and table_b together, the key is outlet_category_6 + item_code. The expected result is shown in table_c below. Thanks.

table_a
outlet_category_6                 item_code    item_description       quantity    
----------------------               ------------    ----------------------- -----------
ODV Restaurant                    A001           Coke                            10
ODV Restaurant                    A002           Sprite                           10
ODV Restaurant                    A003           Fanta                            10
Corner Restaurant                A001           Coke                             10
Corner Restaurant                A003           Fanta                            10
Corner Restaurant                A004           Coke Light                     10

table_b
outlet_category_6                 item_code    item_description       quantity    
----------------------               ------------    ----------------------- -----------
ODV Restaurant                    A001           Coke                             11
ODV Restaurant                    A002           Sprite                            11
ODV Restaurant                    A004           Coke Light                      11
Corner Restaurant                A001           Coke                              11
Corner Restaurant                A004           Coke Light                      11

table_c (Expected Result)
table_b
outlet_category_6                 item_code    table_a_item_description     table_b_item_description  table_a_quantity  table_a_quantity
----------------------               ------------    ----------------------------      ----------------------------  -------------------  -------------------
ODV Restaurant                    A001           Coke                                  Coke                               10                      11
ODV Restaurant                    A002           Sprite                                 Sprite                             10                      11
ODV Restaurant                    A003           Fanta                                 Fanta                              10                      11
ODV Restaurant                    A004           Coke Light                          Coke Light                        10                      11
Corner Restaurant                A001           Coke                                  Coke                                10                      11
Corner Restaurant                A003           Fanta                                 Fanta                               10                      11
Corner Restaurant                A004           Coke Light                          Coke                                 10                     11

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Asked On
2007-01-11 at 23:14:54ID22120167
Topic

MS SQL Server

Participating Experts
1
Points
50
Comments
5

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Answers

 

by: angelIIIPosted on 2007-01-11 at 23:20:26ID: 18299489

select * from table_a a join table_b b on a.item_code = b.item_code and a.outlet_category_6 = b.outlet_category_6

now, I assume that in table_b you only forgot 1 row or had 1 rows too much in the sample expected output?

 

by: acwngPosted on 2007-01-11 at 23:41:51ID: 18299564

Sorry the expected result should look like this:

table_c (Expected Result)
outlet_category_6                 item_code    table_a_item_description     table_b_item_description  table_a_quantity  table_a_quantity
----------------------               ------------    ----------------------------      ----------------------------  -------------------  -------------------
ODV Restaurant                    A001           Coke                                  Coke                               10                      11
ODV Restaurant                    A002           Sprite                                 Sprite                             10                      11
ODV Restaurant                    A003           Fanta                                 NULL                              10                       NULL
ODV Restaurant                    A004           NULL                                 Coke Light                        NULL                   11
Corner Restaurant                A001           Coke                                  Coke                               10                      11
Corner Restaurant                A003           Fanta                                 NULL                               10                       NULL
Corner Restaurant                A004           Coke Light                          Coke                                10                     11

 

by: angelIIIPosted on 2007-01-11 at 23:45:51ID: 18299577

full outer join will be required:

select coalesce(a.outlet_category_6 , b.outlet_category_6 ) outlet_category_6
, coalesce(a.item_code ,b.item_code ) item_code
, a.item_description table_a_item_description
, b.item_description table_b_item_description
, a.quantity table_a_quantity
, b.quantity table_b_quantity
from table_a a
full outer join table_b b
 on a.item_code = b.item_code
and a.outlet_category_6 = b.outlet_category_6

20120131-EE-VQP-002

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