Exam 5: Multiple-Table Queries

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The product of two tables is formally called the ____ Product.​

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To retrieve data from more than one table,you must ____________________ the tables together by finding rows in the two tables that have identical values in matching columns.​

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Describe the types of outer joins.​

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When using a DBMS without an optimizer,the formulation of a query can make a difference in the speed with which the query is executed.

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You can join tables by using a condition in the ____ clause.​

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You can use the IN operator to retrieve data from multiple tables.

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A(n)____ clause can include statistics calculated for only the groups or columns whose values are identical for each row in a group.​

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Two tables are ____________________ compatible if they have the same number of columns and if their corresponding columns have identical data types and lengths.​

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There are three types of inner joins.

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The ____________________ of two tables is a table containing every row that is in either the first table,the second table,or both tables.​

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You join tables in SQL by including a condition in the ____________________ clause to ensure that matching columns contain equal values.​

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If you precede the subquery by the ____ operator,the condition is true only if it satisfies any value (one or more)produced by the subquery.​

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SQL performs many built-in ____________________ that analyze queries to determine the best way to satisfy them.​

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In a full outer join,all rows from both tables will be included regardless of whether they match rows from the other table.

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Occasionally,a self-join might involve the primary key of a table.

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The ____ of two tables is a table containing all rows that are in both tables.​

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A subquery within a subquery is called a(n)____________________ subquery.​

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One reason for using an alias is when you are joining a table to itself.

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If you precede a subquery by the ____________________ operator,the condition is true only if it satisfies one or more values produced by the subquery.​

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In a ____,all rows from the table on the right will be included regardless of whether they match rows from the table on the left.​

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