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1 Μαΐ 2012 · Oracle lets you update the results of a SELECT statement. UPDATE (<SELECT Statement>) SET <column_name> = <value>. WHERE <column_name> <condition> <value>; I suppose that this could be used for updating columns in one table based on the value of a matching row in another table.
The syntax for the Oracle UPDATE statement when updating one table with data from another table is: UPDATE table1. SET column1 = (SELECT expression1. FROM table2. WHERE conditions) [WHERE conditions]; Parameters or Arguments. column1, column2, ... column_n. The columns that you wish to update. expression1, expression2, ... expression_n.
UPDATE (SELECT tt.id, tt.code, tt.description, st.code AS st_code, st.description AS st_description FROM dest_tab tt, source_tab st WHERE tt.id = st.id AND st.id = 2500) ilv SET ilv.code = ilv.st_code, ilv.description = ilv.st_description; -- Rows limited by the WHERE clause of the UPDATE.
UPDATE statement. Syntax. { UPDATE table-Name [[AS] correlation-Name] SET column-Name = Value . [ , column-Name = Value} ]* [WHERE clause] |. UPDATE table-Name . SET column-Name = Value . [ , column-Name = Value ]* WHERE CURRENT OF . } where Value is defined as follows: Expression | DEFAULT.
update (select flight_duration from flights where flight_duration >= interval '4' hour with check option) set flight_duration = flight_duration - interval '2' hour ORA-01402: view WITH CHECK OPTION where-clause violation
This tutorial shows you how to use Oracle UPDATE statement to change existing values in a table. It also provides some practical examples of updating data.
21 Δεκ 2022 · Here's a simplified example that indicates what i want to do: with comp as ( select *, 42 as ComputedValue from mytable where id = 1. ) update t. set SomeColumn = c.ComputedValue. from mytable t. inner join comp c on t.id = c.id .
