Αποτελέσματα Αναζήτησης
15 Μαρ 2012 · 3 Answers. Sorted by: 17. select decode(type_id, null, 'Unknown', type_id), name, count(*) from. ( select 'asdf' type_id, 'name1' name from dual union all. select 'asdf' type_id, 'name2' name from dual union all. select null type_id, 'name3' name from dual. ) test_table. group by type_id,name;
4 Ιαν 2024 · In this article, I'll introduce a small yet efficient Python script that simplifies the conversion of Oracle DECODE expressions. DECODE compares expr to each search value one by one. If...
1 Ιουν 2023 · Oracle DECODE Function with NULL Values. As I mentioned above, the Oracle DECODE function is an exception to other functions in how it handles NULL values. It treats a NULL expression and NULL search as equal (so NULL == NULL). So, this example will return 1: SELECT DECODE(NULL, NULL, 1, 0) FROM DUAL;
Oracle DECODE() function and NULL. NULL cannot be compared to anything even NULL. However, DECODE() function treats two null values are being equal. The following statement returns the string Equal: SELECT DECODE (NULL, NULL, 'Equal', 'Not equal') FROM dual; Code language: SQL (Structured Query Language) (sql)
Output type handlers enable applications to change how data is fetched from the database. For example, numbers can be returned as strings or decimal objects. LOBs can be returned as strings or bytes. A type handler is enabled by setting the outputtypehandler attribute on either a cursor or the connection. If set on a cursor, it only affects ...
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 ...
1 Νοε 2010 · SET eye = DECODE(p_EYE, ' ', null, null, eye, p_EYE), fpc = DECODE(p_FPC, ' ', null, null, fpc, p_FPC), hai = DECODE(p_HAI, ' ', null, null, hai, p_HAI), hgt = DECODE(p_HGT, ' ', null, null, hgt, p_HGT), skn = DECODE(p_SKN, ' ', null, null, skn, p_SKN), wgt = DECODE(p_WGT, ' ', null, null, wgt, p_WGT) WHERE mpi_number = p_MPINumber; COMMIT ...
