A、You cannot update a view with group functions.
B、When you update a view group functions are automatically computed.
C、When you update a view only the constraints on the underlying table will be in effect.
D、When you update a view the constraints on the views always override the constraints on the underlying tables.
更多“What is true about updates through a view?（）”相关的问题
A、A.true true B、B.false true C、C.true false D、D.false false E、E.Compilation fails. F、F. An exception is thrown at runtime.
A、A. The DESCRIBE DEPT statement displays the structure of the DEPT table. B、B. The ROLLBACK statement frees the storage space occupies by the DEPT table. C、C. The DESCRIBE DEPT statement returns an error ORA-04043: object DEPT does not exist. D、D. The DESCRIBE DEPT statement displays the structure of the DEPT table only if there is a COMMIT statement introduced before the ROLLBACK statement.
A、The start value of the sequence is always 1. B、A sequence always increments by 1. C、The minimum value of an ascending sequence defaults to 1. D、The maximum value of descending sequence defaults to 1.
A、The start value of the sequence is always 1. B、A sequence always increments by 1. C、The minimum value of an ascending sequence defaults to 1. D、The maximum value of descending sequence defaults to 1.
A、Result Type is optional. B、Result Type is mandatory. C、Result Type can be changed after it is assigned to the function activity. D、Result Type should belong to the same item type as the function activity
A、Only configured on the egress router B、Only configured on the ingress router C、Is pre-signalled to reduce packet loss D、Must intersect the primary LSP at two locations
A、A. It is loaded with the FIXED status. B、B. It is loaded with the ACCEPTED status. C、C. It is not loaded with the ENABLED status. D、D.It is not loaded with the ACCEPTED status.
A、true,true B、false,true C、true,false D、false,false E、Compilation fails. F、An exception is thrown at runtime.
A、Once created, a sequence belongs to a specific schema. B、Once created, a sequence is linked to a specific table. C、Once created, a sequence is automatically available to all users. D、Only the DBA can control which sequence is used by a certain table. E、Once created, a sequence is automatically used in all INSERT and UPDATE statements.
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