Exam 4: Single-Table Queries

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Instead of including every column in the SELECT clause,you can use an ampersand (&)to indicate that you want to include all columns.​

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Describe simple and compound conditions.​

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The COUNT function only applies to columns with numeric values.​

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To specify that query results be listed in a specific order,use the SORT BY clause.​

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The ____ operator finds rows that do not contain a null value in the specified column.​

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When you use the ____________________ function,you must specify the column to total,and the column data type must be numeric.​

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Preceding a condition by the ____ operator reverses the truth of the original condition.​

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When the OR operator connects simple conditions,the compound condition will be true whenever any one of the simple conditions is true.​

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When you use the ____ function,you can use the asterisk (*)to represent any column.​

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When you need to sort data on two columns,the more important column is called the ____________________ sort key.​

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Preceding a condition by the NOT operator reverses the truth of the original condition.​

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In a SELECT statement,the FROM clause and the WHERE clause (when used)must appear on separate lines.​

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A simple condition has the form: column name,comparison operator,and then either another column name or a value.​

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A(n)____________________ column is a column that does not exist in the database but can be computed using data in the existing columns.​

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When you need to sort data on two columns,the less important column is called the ____ sort key.​

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In the SELECT clause,you can use the ____ symbol to indicate that you want to include all columns.​

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In SQL,you use the ____ command to query a database.​

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The UNIQUE operator eliminates duplicate values in a query.​

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When the ____________________ operator connects simple conditions,all the simple conditions must be true in order for the compound condition to be true.​

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____________________ creates groups of rows that share some common characteristic.​

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