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In which two cases would you use an outer join? （）
- A、The tables being joined have NOT NULL columns.
- B、The tables being joined have only matched data.
- C、The columns being joined have NULL values.
- D、The tables being joined have only unmatched data.
- E、The tables being joined have both matched and unmatched data.
- F、Only when the tables have a primary key-foreign key relationship.
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更多 “In which two cases would you use an outer join? （）A、The tables being joined have NOT NULL columns.B、The tables being joined have only matched data.C、The columns being joined have NULL values.D、The tables being joined have only unmatched data.E、The tables being joined have both matched and unmatched data.F、Only when the tables have a primary key-foreign key relationship.” 相关考题
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In which two cases would you use an outer join? ()
A. The tables being joined have NOT NULL columns.B. The tables being joined have only matched data.C. The columns being joined have NULL values.D. The tables being joined have only unmatched data.E. The tables being joined have both matched and unmatched data.F. Only when the tables have a primary key/foreign key relationship.
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What is true about joining tables through an equijoin? ()
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What is necessary for your query on an existing view to execute successfully? ()
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Which four actions are possible during an Online Data file Move operation?()
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In which three cases would you use the USING clause?()
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Which two statements are true regarding the USING clause in table joins?（）A、It can be used to join a maximum of three tables B、It can be used to restrict the number of columns used in a NATURAL join C、It can be used to access data from tables through equijoins as well as nonequijoins D、It can be used to join tables that have columns with the same name and compatible data types
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Which four actions are possible during an Online Data file Move operation?（）A、Creating and dropping tables in the data file being movedB、Performing file shrink of the data file being movedC、Querying tables in the data file being movedD、Performing Block Media Recovery for a data block in the data file being movedE、Flashing back the databaseF、Executing DML statements on objects stored in the data file being moved
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Which two statements are true regarding the USING and ON clauses in table joins?（）A、Both USING and ON clauses can be used for equijoins and nonequijoins B、Amaximum of one pair of columns can be joined between two tables using the ON clause C、The ON clause can be used to join tables on columns that have different names but compatible data types D、The WHERE clause can be used to apply additional conditions in SELECT statements containing the ON or the USING clause
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In which two cases would you use an outer join? （）A、The tables being joined have NOT NULL columns.B、The tables being joined have only matched data.C、The columns being joined have NULL values.D、The tables being joined have only unmatched data.E、The tables being joined have both matched and unmatched data.F、Only when the tables have a primary key/foreign key relationship.
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You create a Web Form that displays a GridView. The GridViews data source is a DataSet named dsOrders. The DataSet contains two DataTables named Orders and OrderDetails. You create a relation between the two DataTables using the following code segment. (Line numbers are included for reference only.)01 dtOrders = dsOrders.Tables[“Orders”]; 02 dtOrderDetails = dsOrders.Tables[“OrderDetail”]; 03 colParent = dtOrders.Columns[“OrderID”]; 04 colChild = dtOrderDetails.Columns[“ParentOrderID”]; 05 dsOrders.Relations.Add(“Rell”, colParent, colChild, false); You need to find the cause of the exception being raised in line 05. What should you do? （）A、Ensure that the child column and the parent column have the same names.B、Ensure that the child table and the parent table have the same names.C、Ensure that the child column and the parent column have the same data types.D、Ensure that each row in the child table has a corresponding row in the parent table.E、Ensure that the tables have an explicit relationship defined by a foreign key constraint in the database.
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多选题What two statements are true regarding the recommendations received from the SQL Access Advisor?（）(Choose two.)AIt cannot generate recommendations that support multiple workload queries.BIt can recommend partitioning on tables provided that the workloads have some predicates and joins on the columns of the NUMBER or DATE type.CIt can recommend partitioning only on tables that have at least 10,000 rows.DIt can recommend only B-tree indexes and not bitmap or function-based indexes
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多选题Which two statements are true regarding the USING clause in table joins?（）AIt can be used to join a maximum of three tablesBIt can be used to restrict the number of columns used in a NATURAL joinCIt can be used to access data from tables through equijoins as well as nonequijoinsDIt can be used to join tables that have columns with the same name and compatible data types
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考题
单选题In which case would you use a FULL OUTER JOIN?（）A
Both tables have NULL values.B
You want all unmatched data from one table.C
You want all matched data from both tables.D
You want all unmatched data from both tables.E
One of the tables has more data than the other.F
You want all matched and unmatched data from only one table.
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多选题Which two statements are true regarding the USING and ON clauses in table joins?（）ABoth USING and ON clauses can be used for equijoins and nonequijoinsBAmaximum of one pair of columns can be joined between two tables using the ON clauseCThe ON clause can be used to join tables on columns that have different names but compatible data typesDThe WHERE clause can be used to apply additional conditions in SELECT statements containing the ON or the USING clause
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多选题Which four actions are possible during an Online Data file Move operation?（）ACreating and dropping tables in the data file being movedBPerforming file shrink of the data file being movedCQuerying tables in the data file being movedDPerforming Block Media Recovery for a data block in the data file being movedEFlashing back the databaseFExecuting DML statements on objects stored in the data file being moved
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多选题What are two reasons to create synonyms? （）AYou have too many tables.BYour tables are too long.CYour tables have difficult names.DYou want to work on your own tables.EYou want to use another schema's tables.FYou have too many columns in your tables.
考题
多选题In which two cases would you use an outer join? （）AThe tables being joined have NOT NULL columns.BThe tables being joined have only matched data.CThe columns being joined have NULL values.DThe tables being joined have only unmatched data.EThe tables being joined have both matched and unmatched data.FOnly when the tables have a primary key-foreign key relationship.
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