A、A MERGE statement is used to merge the data of one table with data from another.
B、A MERGE statement replaces the data of one table with that of another.
C、A MERGE statement can be used to insert new rows into a table.
D、A MERGE statement can be used to update existing rows in a table.
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A、Asinglerowsubquerycanretrieveonlyonecolumnandonerow. B、Asinglerowsubquerycanretrieveonlyonerowbutmanycolumns. C、Amultiplerowsubquerycanretrievemultiplerowsandmultiplecolumns. D、Amultiplerowsubquerycanbecomparedusingthe"；>；"；operator. E、AsinglerowsubquerycanusetheINoperator. F、Amultiplerowsubquerycanusethe"；="；operator.
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A、A. Statistics collection is not done for the CUSTOMERS table when schema stats are gathered. B、B. Statistics collection is not done for the CUSTOMERS table when database stats are gathered. C、C. Any existing statistics for the CUSTOMERS table are still available to the optimizer at parse time. D、D. Statistics gathered on the CUSTOMERS table when schema stats are gathered are stored as pending statistics. E、E. Statistics gathered on the CUSTOMERS table when database stats are gathered are stored as pending statistics.
A、Transparent mode is layer 2. B、Routed mode is layer 3. C、Routed mode has 1 IP address. D、Transparent mode has 1 IP address.
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