更多"What does the TRUNCATE statement do"的相关试题:
[单项选择]What does the TRUNCATE statement do?（）
A. Removes the table
B. Removes all rows from a table
C. Shortens the table to 10 rows
D. Removes all columns from a table
E. Removes foreign keys from a table
[单项选择]What does Peter do?（）
A. He's good at fixing things.
B. He can speak good German.
C. He does the washingup after supper
D. He's a language teacher.
[单项选择]What does the author mean by the statement in Sentence 5 that twentieth-century journalism was foreshadowed by the penny press
A. The penny press darkened the reputation of newswriting.
B. Twentieth-century journalism is more important than nineteenth-century journalism.
C. Penny-press news reporting was more accurate than that in twentieth-century newspapers.
D. Modem news coverage is similar to that done by the penny press.
[单项选择]What does the author mean by the statement "A world beyond the immediate' community was rapidly becoming visible" in lines 15—16
A. Photographs made newspapers more interesting.
B. The United States exported newspapers to other countries.
C. People were becoming increasingly aware of national and international issues.
D. Communities remained isolated despite tile growth of popular journalism.
[单项选择]What does Nera do for the preparation for becoming a secretary or a nurse
A. She is working in a nursery.
B. She is moving into her own apartment.
C. She is studying in a high school.
D. She is asking help from the father.
[单项选择]What does a man do when he cannot get exactly what he wants
A. He buys a similar thing of the colour he wants.
B. He usually does not buy anything.
C. At least two of his requirements must be met before he buys.
D. So long as the style is right, he buys the thing.
[单项选择]What does Forbes do when the exact assets are not known
A. It makes a fair guess.
B. It excludes the wealth of the privately held companies.
C. It makes a moderate assumption.
D. It estimates prudently the assets on the basis of the measurable wealth of the similar company.
[单项选择]What does a router do?（）
A. Stores data on the network and connects the local-area network (LAN) to the wide-area network (WAN)
B. Routes traffic down alternative paths and connects the local-area network (LAN) to the wide- area network (WAN)
C. Broadcasts data to all devices that are connected to it across the local-area network (LAN) and wide-area network (WAN)
D. Reads Media Access Control (MAC) addresses to forward messages to the correct location and connects the local-area network (LAN) to the wide-area network (WAN)
[单项选择]What does your father do?（）
A. He is cleaning the street
B. He is forty
C. He is a farmer
D. He is all right
[单项选择]What does Henry do to earn a ______
A. job
B. career
C. profession
D. living
[多项选择]Evaluate the SQL statement: TRUNCATE TABLE DEPT; Which three are true about the SQL statement? （）
A. It releases the storage space used by the table.
B. It does not release the storage space used by the table.
C. You can roll back the deletion of rows after the statement executes.
D. You can NOT roll back the deletion of rows after the statement executes.
E. An attempt to use DESCRIBE on the DEPT table after the TRUNCATE statement executes will display an error.
F. You must be the owner of the table or have DELETE ANY TABLE system privileges to truncate the DEPT table
[多项选择]Evaluate the SQL statement:TRUNCATE TABLE DEPT;Which three are true about the SQL statement? （）
A. It releases the storage space used by the table.
B. It does not release the storage space used by the table.
C. You can roll back the deletion of rows after the statement executes.
D. You can NOT roll back the deletion of rows after the statement executes.
E. An attempt to use DESCRIBE on the DEPT table after the TRUNCATE statement executes will display an error.
F. You must be the owner of the table or have DELETE ANY TABLE system privileges to truncate the DEPT table
[多项选择]Evaluate the SQL statement: TRUNCATE TABLE DEPT;Which three are true about the SQL statement? （）
A. It releases the storage space used by the table.
B. It does not release the storage space used by the table.
C. You can roll back the deletion of rows after the statement executes.
D. You can NOT roll back the deletion of rows after the statement executes.
E. An attempt to use DESCRIBE on the DEPT table after the TRUNCATE statement executes will display an error.
F. You must be the owner of the table or have DELETE ANY TABLE system privileges to truncate the DEPT table.
[单项选择]What does a BGP route reflector do when reflecting a route?（）
A. It prepends its cluster identifier to the route's cluster list.
B. It prepends its own originator identifier to the route's cluster list.
C. It replaces the route's cluster identifier with its own cluster identifier.
D. It replaces the route's originator identifier with its originator identifier.
[单项选择]What does a router do if it has no EIGRP feasible successor route to a destination network and the successor route to that destination network is inactive status?（）
A. It routes all traffic that is addresses to the destination network to the interface indicates in the routing table.
B. It sends a copy of its neighbor table to all adjacent routers.
C. It sends a multicast query packet to all adjacent neighbors requesting available routing paths to the destination network.
D. It broadcasts Hello packets to all routers in the network to re-establish neighbor adjacencies.
[单项选择]What does "most businesses do without a second thought" (paragraph 3) mean
