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How to update a table joined with another table multiple times in Oracle?


How to update a table joined with another table multiple times in Oracle?

By : Maximian
Date : October 15 2020, 08:10 PM
will be helpful for those in need From your revised question, I think the solution is to assemble the GROUP_LEVEL_DETAIL names in the subquery to make a key which you can join to the TOTAL table.
code :
merge into TOTAL t
using ( select d1.code as d1_code
               , d2.code as d2_code
               , d3.code as d3_code
               , d1.name || ' - ' ||
                 d2.name || ' - ' ||
                 d3.name as joined_code
         from  GROUP_LEVEL_DETAIL d1
         cross join GROUP_LEVEL_DETAIL d2
         cross join GROUP_LEVEL_DETAIL d3
         where d1.level_no = 1
         and   d2.level_no = 2
         and   d3.level_no = 3  
       ) d
on ( t.gl = d.joined_code )
when matched then
    update 
    set t.gl_code1 = d.d1_code
        ,  t.gl_code2 = d.d2_code
        ,  t.gl_code3 = d.d3_code


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Oracle/SQL - Join one table multiple times to the same table

Oracle/SQL - Join one table multiple times to the same table


By : user3248868
Date : March 29 2020, 07:55 AM
it should still fix some issue I'm trying to wrap my brain around a query and hoping you can help. I have two tables: a customer_table and a product_table that look like this , There is no need to join one table twice:
code :
SELECT *
FROM customers
WHERE sku_num1 IN (SELECT sku_num
                   FROM product_table)
   OR sku_num2 IN (SELECT sku_num
                   FROM product_table)
   ....
How to select the COUNT() of a joined table when the joined table has a combination of multiple columns as its primary k

How to select the COUNT() of a joined table when the joined table has a combination of multiple columns as its primary k


By : user255501
Date : March 29 2020, 07:55 AM
Does that help Count will only return the number of non null values in a column or the number of rows in a result set for the special case of count(*). In other words count(paylog.*) isn't valid SQL.
You don't need a unique column in the paylog table to do a valid count, any column will do. If the join is successful it'll increment the count, if not the column's value will be null and the count stays the same.
How update a table multiple times in Oracle SQL using java-using multithread or loops

How update a table multiple times in Oracle SQL using java-using multithread or loops


By : user5464908
Date : March 29 2020, 07:55 AM
To fix this issue You probably want to use the JDBC addBatch() and executeBatch() functionality: JDBC insert multiple rows . This will let you queue up your multiple rows, then insert them in one group.
The other interpretation of your question is: you need to turn the autocommit off, then use the JDBC begin() and commit() functionality to insert into several different tables, and they all go in at the same time.
code :
pstmt.executeUpdate(Table1);
pstmt.executeUpdate(Table2);
conn.commit();
Oracle SQL - How do I update from an Outer Joined Table?

Oracle SQL - How do I update from an Outer Joined Table?


By : Twixles
Date : March 29 2020, 07:55 AM
To fix the issue you can do If I understood you correctly, you want to set the value to NULL if there is no match in the dw_sls_rep_conv table? If so, just drop your EXISTS condition and all the rows will be updated:
code :
UPDATE SalesExt_tmp tmp
SET slsrep = (SELECT three_dig_rep 
              FROM dw_sls_rep_conv sls
              WHERE sls.aims_rep = tmp.slsrep)
WHERE tmp.sysind = 'AIM';
How to update table multiple times based on another table

How to update table multiple times based on another table


By : mpita
Date : March 29 2020, 07:55 AM
To fix the issue you can do I'm trying to update a table multiple times based on data from another table. , You could use an inline subquery, like:
code :
UPDATE TableA A
SET A.QTY = A.QTY + (
   SELECT SUM(B.QTY) FROM TableB B WHERE A.Goods = B.Goods AND A.Type = B.Type
)
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