Search results
6 lis 2015 · I have a problem with building a conditional update statement in Oracle. For understandability, I'll simplify the problem and basically my update statement should look like this: UPDATE SAMPLE_TAB1 t. SET t.sample_column1 =NVL(t.sample_column1, **SOME LOGIC**);
UPDATE. You can use a condition in any of these clauses of the SELECT statement: WHERE. START WITH. CONNECT BY. HAVING. A condition could be said to be of a logical data type, although Oracle Database does not formally support such a data type. The following simple condition always evaluates to TRUE: 1 = 1
12 lis 2024 · Nested Cursor loops and conditional insert and update statements-Performace issues Hi Tom,Hope you are doing well!I have 2 cursor loops. cursor C1,cursor c2(parameterised on C1 results).below is a pseudo code depicting the situation:declarecursor C1 select distinct a,b,c from table1;--fetches 18K+records cursor c2(p_a,p_b,p_c) select * from
UPDATE Statement. The UPDATE statement changes the values of specified columns in one or more rows in a table or view. For a full description of the UPDATE statement, see Oracle Database SQL Reference. Syntax.
Use the UPDATE statement to change existing values in a table or in the base table of a view or the master table of a materialized view. Prerequisites. For you to update values in a table, the table must be in your own schema or you must have the UPDATE object privilege on the table. For you to update values in the base table of a view:
This statement is equivalent to: update people_target t set (t.first_name, t.last_name) = ( select s.first_name, s.last_name from people_source s where s.person_id = t.person_id ) where exists ( select null from people_source s where s.person_id = t.person_id).
27 lip 2018 · MERGE INTO table1 t1 USING table2 t2 ON (t1.id=t2.id) WHEN MATCHED THEN UPDATE SET t1.color = t2.color WHEN NOT MATCHED THEN INSERT (t1.ID, t1.color) VALUES (t2.ID, t2.color); If you don't want to override the colors, you can simply remove the 'WHEN MATCHED' part.
