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8 mar 2011 · and ( ( p_dateField IS NOT NULL AND table.dateField = p_dateField) OR ( p_dateField IS NULL AND (table.dateField is null or (table.dateField is not null)) ) It works for the few tests I've been able to run against it.
18 gru 2013 · => select date_field from table_name where date_field is not null If you want the default value to be null => SELECT NVL(DATE_FIELD, '1900-01-01') FROM TABLE_NAME
To check if a value is NULL or not, you should use the IS NULL operator as follows: expression | column IS NULL Code language:SQL (Structured Query Language)(sql) The IS NULL operator returns true if the expression or column is NULL. Otherwise, it returns false.
12 wrz 2017 · SQL> SELECT comp_oid 2 FROM t 3 WHERE NVL (comp_date, TO_DATE ('01/01/1900', 'MM/DD/YYYY')) = 4 TO_DATE (NVL ('6/1/2005', '01/01/1900'), 'MM/DD/YYYY') 5 AND file_num = NULL 6 AND id_num = '1'; no rows selected SQL> show parameters nls_date_format; NAME TYPE VALUE ----- ----- ----- nls_date_format string SQL> The date values never equal so I don ...
5 paź 2023 · Oracle DATE data type example. The following statement creates a table named my_events: CREATE TABLE my_events ( event_id NUMBER GENERATED BY DEFAULT AS IDENTITY, event_name VARCHAR2 ( 255) NOT NULL, location VARCHAR2 ( 255) NOT NULL, start_date DATE NOT NULL, end_date DATE NOT NULL, PRIMARY KEY ( event_id ) ); Code language: SQL (Structured ...
The IS NOT NULL operator is used to test for non-empty values (NOT NULL values). The following SQL lists all customers with a value in the "Address" field: Example
29 lut 2016 · This page provides you with the most commonly used Oracle date functions that help you handle date and time data easily and more effectively. Function. Example. Result. Description. ADD_MONTHS. ADD_MONTHS( DATE '2016-02-29', 1 ) 31-MAR-16. Add a number of months (n) to a date and return the same day which is n of months away.
