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8 mar 2021 · 2 Answers. Sorted by: 2. Use NVL function. select jobs, nvl(salary, 0) as salary. from your_table. Or COALESCE. select jobs, coalesce(salary, 0) as salary. from your_table. Or DECODE. 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.
The Oracle NVL() function allows you to replace null with a more meaningful alternative in the results of a query. The following shows the syntax of the NVL() function: NVL(e1, e2) Code language: SQL (Structured Query Language) ( sql )
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 ...
11 cze 2013 · In our DB we store character NULL values as a single character blank string ' '. How does this work with the NVL command? Example.
15 mar 2006 · CREATE TABLE BARMERESULT ( ID NUMBER(10, 0) NOT NULL ENABLE, SEQUENCES NUMBER(10, 0), VALIDFLAG NUMBER(1, 0), MEWEIGHT FLOAT(126), WEIGHTDATE DATE, HISTORY VARCHAR2(10), STORAGEFLAG NUMBER(1, 0), SUBMITSIGN NUMBER(1, 0), SUBMITDATE DATE, BRANCHCOUNT NUMBER(5, 0), PIECECOUNT NUMBER(5, 0), ACADEMICWEIGHT FLOAT(126), BARMEREQUEST_ID NUMBER(10, 0 ...
14 sty 2022 · You can use any of the option below. Using NVL () SELECT ID ,NVL (NAME, 0) FROM TEST; Using ANSI standard coalesce () SELECT ID ,coalesce (NAME, '0') FROM TEST; Using CASE. SELECT ID ,CASE WHEN NAME IS NOT NULL THEN NAME ELSE '0' END FROM TEST; DEMO. edited Nov 14, 2017 at 8:56.
23 lut 2012 · ASCII code 0 represents the "NUL" character, and can be entered using oracle's CHR () function [ chr (0) ]. The entered value can be tested with ascii () function (i.e. select * from tab where ascii (col) = 0). The "empty string" is not showing to have an ascii value of '0'. Only in C would '\0' be the emtpy string.
