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A business model and benchmarks are needed to keep a lid on expenses The leadership must ensure that the sales expenses, general and administrative expenses, and other operating expenses remain within specified limits They must track operating expenses as close to real time as possible, for such knowledge is the lifeline of the business The leadership must watch these expenses on a monthly or quarterly basis and link its compensation to the components of profitability instead of to profitability alone In small, medium, and large businesses, the leadership often promises profits to shareholders at some later date that never materializes That promise may have been a good goal; however, the leadership team s strategy and actions were not in line with those objectives.

As you can see, only four rows are returned. For each row, the R_PRICE value is greater than the highest price returned by the subquery, which in this case would be 14.99.

Q: A:

Here is a typical user-defined data type, similar to that shown in Example 2.7. Now, however, we will declare two arrays whose elements are of this type. Arrays of this type might be useful in a customer billing application.

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You state that a SELECT clause can include a subquery. How would you include the subquery in that clause You can include the subquery in a SELECT clause just as you would a column name. The values returned from the subquery are inserted in the query results in the same way column values would be inserted. For example, you can insert a subquery in a SELECT clause of a statement that is used to query the CD_STOCK table (shown in Figure 12-1). The subquery pulls data from the CD_ARTISTS table, as shown in the following example:

SELECT CD_TITLE, ( SELECT ARTIST_NAME FROM CD_ARTISTS a WHERE s.CD_TITLE = a.TITLE ) AS ARTIST, STOCK FROM CD_STOCK s;

By the time shareholders realize that profitability objectives are going to be missed, it is usually too late to respond by cutting expenses and cost without jeopardizing the existence of the company In managing for profitability, the leadership must measure what matters The measurements must be set for cost and sales components Goals to achieve and goals to improve continually must be in place With an effective leadership and superior management, the goals can be achieved and profitability can.

In the main part of this statement, values are pulled from the CD_TITLE and STOCK columns. In addition to these values, a list of artists is returned by the subquery. The artists names are matched up to their CDs by using a comparison predicate to compare values in the CD_TITLE and TITLE columns. When using a subquery in a SELECT clause, you must be careful not to create a subquery that returns only one value when multiple values are needed. When you return only one value, that value might be inserted into all rows returned by the main SELECT statement, depending on how you ve constructed your query.

So far, we have looked at subqueries that can return one or more rows of data. This is fine in many circumstances; however, there might be times when you want your subquery to return only one value so that you can compare the values in one column with a single subquery value. In these cases, you can use comparison operators.

As you learned in 9, the comparison operators include equal to (=), not equal to (<>), less than (<), greater than (>), less than or equal to (<=), and greater than or equal to (>=). For example, let s take another look at the RETAIL_PRICES and SALES_PRICES tables (shown in Figure 12-2). Suppose you want to retrieve data from the RETAIL_PRICES table. You want the R_PRICE values to equal the maximum price listed in the S_PRICE column of the SALES_PRICES table. The following query allows you to return the necessary data:

Once the data type has been defined, we can declare one or more variables of this data type, as follows.

SELECT CD_NAME, R_PRICE FROM RETAIL_PRICES WHERE R_PRICE = ( SELECT MAX(S_PRICE) FROM SALES_PRICES );

be sustained. Any business is either improving or worsening. There is no status quo to maintain. Survival is found in continually improving all aspects of the profitability equation; otherwise, the business is destined to die.

Notice that the subquery returns only one value, which is 16.99 in this case. As a result, only rows with an R_PRICE value of 16.99 are returned by the SELECT statement, as shown in the following query results:

CD_NAME ----------------------------Famous Blue Raincoat Patsy Cline: 12 Greatest Hits R_PRICE ------16.99 16.99

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