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SQL ch3 review
| Question | Answer |
|---|---|
| A ____ is simply a question represented in a way that the DBMS can understand. | query |
| After you type the word SELECT, you list the columns that you want to include in the query results. This portion of the command is called? | SELECT clause |
| Next you type the word FROM followed by the name of the table that contains the data you need to query. This portion of the command is called? | FROM clause |
| Finally, after the word WHERE you list any conditions that apply to the data you want to retrieve. This optional portion of the command is called the? | WHERE clause |
| A ___ has this form: column name, comparison operator, and then either another column name or a value | simple condition |
| You form ___ ___ by connecting two or more simple conditions using the AND, OR and NOT operators. | compound conditions |
| A _____ ___ is a column that does not exist in the database but can be computed using data in the existing columns. | computed column |
| An ____ which consists of the IN operator followed by a collection of values, provides a concise way of phrasing certain conditions. | IN clause |
| In SQL, you specify the results order by using the __ clause. | ORDER BY |
| 34.The column on which data is to be sorted is called a ____ or simply a ___. | sort key, key |
| 34.When you need to sort data on two columns, the more important column is called the _____ (or the ___ ) and the less important column is called the ____ or the ____. | major sort key (primary sort key), minor sort key(secondary sort key) |
| 34.SQL has special functions, called ___ ___ to calculate sums, averages, counts, max values, and min values. | aggregate functions |
| 34.It is possible to place one query inside another. The inner query is called a ____; the subquery is evaluated __. | subquery, first |
| 34.The ____ is used to restrict the groups that will be included. | HAVING clause |
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kat1350
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