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...
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...
Werbung / Advertisements The SQL Developer sets implicit automatic COMMITs. This COMMIT is subconsciously and automatically canceled in the following situations. (1) SQL Developer quits normally, with no COMMIT or ROLLBACK statement. In this...