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26 Απρ 2016 · As a SQL Server loyalist, I've been struggling with DB2's seeming inability to update a table with information from another table--the update with join that's so easy in SSMS. I finally discovered a workaround that functions perfectly instead: the MERGE statement.
17 Νοε 2013 · I think you need to use a derived table to accomplish this: update order_attributes set value = ( select created_by_name from( select created_by_name, oa.order_id from order_approvals oa left outer join order_attributes ot on oa.order_id = ot.order_id AND OT.ATTRIBUTE_ID = 123 and OT.ORDER_ID in (select ORDER_ID from ORDER_APPROVALS where ...
The INNER JOIN clause combines each row from the first table with every row from the second table, keeping only the rows in which the join condition evaluates to true. The following shows the syntax of joining two tables using the INNER JOIN clause: SELECT. select_list. FROM.
This tutorial shows you how to use Db2 joins including inner join, left outer join, right outer join, and full outer join to combine rows from two tables.
Updating Db2 data by using UPDATE statements. You can change the data in a table by using the UPDATE statement or the MERGE statement. The UPDATE statement modifies zero or more rows of a table, depending on how many rows satisfy the search condition that you specify in the WHERE clause.
To update data in a table or view, use the UPDATE statement. With the UPDATE statement, you can change the value of one or more columns in each row that meets the search condition of the WHERE clause.
First, specify the name of the table that you want to update data. Second, specify a list of column c1, c2, …, cn and the corresponding value v1, v2, … vn that need to be updated. Third, specify the condition to indicate which rows to be updated.
