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8 mar 2021 · select jobs, decode(salary, null, 0, salary) as salary from your_table Or CASE select jobs, case when salary is null then 0 else salary end as salary from your_table
This tutorial shows you how to use the Oracle NVL() function to substitute null with a more meaningful alternative.
DROP TABLE null_test_tab; CREATE TABLE null_test_tab ( id NUMBER, col1 VARCHAR2(10), col2 VARCHAR2(10), col3 VARCHAR2(10), col4 VARCHAR2(10) ); INSERT INTO null_test_tab values (1, 'ONE', 'TWO', 'THREE', 'FOUR'); INSERT INTO null_test_tab values (2, NULL, 'TWO', 'THREE', 'FOUR'); INSERT INTO null_test_tab values (3, NULL, NULL, 'THREE', 'FOUR ...
select t.*, coalesce ( volume_of_wood , 0 ) coalesce_two, coalesce ( times_lost, volume_of_wood , quantity_of_stuffing, 0 ) coalesce_many from toys t; You can use these functions in the where clause to map nulls to a real value.
NULL w SQL w bazie Oracle oznaczona jest wartość która jest pusta lub nie ma znaczenia. Wartości null mogą pojawić się w kolumnach dowolnego typu danych, na które nie są nałożone ograniczenia NOT NULL lub kolumna nie jest oznaczona jako PRIMARY KEY.
27 sie 2012 · I am trying to get the DBMS output to list a value for each, if it is null, assign it a zero and move on. I cannot find any examples of where I can do this. Any ideas on how I can assign a zero when there is no value in the table?
4 mar 2011 · Some values are null in salary column.I want to replace null value with zero and make the addition. Like: I want to add 15 where for emp 1 and his sal is null. it should be 0+15=15
