Which two statements are true about gathering statistics? (Choose two.)
A.
If an application has only SQL statements with bind variables, it is better to drop existing histograms, disable
creation of histograms, and allow the optimizer to select the best execution plans.
B.
If end users query newly inserted data, it is possible to get a suboptimal execution plan even if the automatic
statistics gathering job is enabled.
C.
If concurrent statistics gathering is done by using parallel execution, the Resource Manager should be used
for efficient resource management.
D.
For each session that is accessing a global temporary table, the optimizer uses only the shared statistics.