Return a value if no rows are found SQL
Werbung / Advertisements What actually happens when you run a SQL query that doesn’t return any rows? For example, think of a WHERE clause with the condition 1=2, which can never be fulfilled and...
Werbung / Advertisements What actually happens when you run a SQL query that doesn’t return any rows? For example, think of a WHERE clause with the condition 1=2, which can never be fulfilled and...
NVL VS NVL2 Werbung / Advertisements The difference between the SQL functions NVL and NVL2 is, that when using the function NVL2 you can set different values for NULL and NOT NULL. NVL only...
Werbung / Advertisements Sometimes default values are necassary. Normally you can use NVL or NVL2 when you get NULL values as return value. But it is also possible, that no row is returned. In...