You use a NEXTVAL pseudo column to look at the next possible value that would be generated from a sequence, without actually retrieving the value.
You use a CURRVAL pseudo column to look at the current value just generated from a sequence, without affecting the further values to be generated from the sequence.
You use a NEXTVAL pseudo column to obtain the next possible value from a sequence by actually retrieving the value from the sequence.
You use a CURRVAL pseudo column to generate a value from a sequence that would be used for a specified database column.
If a sequence starting from a value 100 and incremented by 1 is used by more than one application, then all of these applications could have a value of 105 assigned to their column whose value is being generated by the sequence.
You use a REUSE clause when creating a sequence to restart the sequence once it generates the maximum value defined for the sequence.
第1题:
A. AH provides data integrity.
B. AH is identified by IP protocol 50.
C. AH is identified by IP protocol 51.
D. AH cannot work in conjunction with ESP
第2题:
Which two statements about VACLs on Cisco Nexus 7000 Series Switches are true? ()
第3题:
A.Null values are left out of the sort.
B.Character values are displayed from Z to A
C.Date values are displayed with the earliest value first.
D.Null values are displayed last for descending sequences.
E.Numeric values are displayed with the lowest values first.
第4题:
Which two statements about OSPF IPv6 routing are true?()
第5题:
Which two statements are true about traffic shaping?()
第6题:
A. 1 is the default precedence.
B. A lower number is preferred.
C. A higher number is preferred.
D. 100 is the default precedence.
第7题:
Which two statements are true about L2TP tunnels?() (Choose two.)
第8题:
A. PAT is not supported.
B. PAT is enabled by default.
C. It supports the address-persistent configuration option.
D. It supports the junos-global configuration option.
第9题:
Which two statements about the Cisco Nexus 1000V VSM are true?()
第10题:
Which two statements about VPLS are true? ()