Introduction
Oracle Database Resource Manager enables you to limit database resources. Oracle has been enhanced in this regard in its new versions; for example, in 12.1.0.1, Database Resource Manager ...
With the releases of 12.1 and 12.2 of Oracle Database we have seen some new functions that perform approximate calculations. These include: APPROX_COUNT_DISTINCT
APPROX_COUNT_DISTINCT_DETAIL
APPROX_...
While the SQL standard allows multiple NULLS in a unique column, and that is how Postgres behaves, some database systems (e.g. MS_SQL) allow only a single NULL in such cases. Users migrating from othe...
