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In these exciting as well as nerve-racking times, customer expectations are changing as well. Customers increasingly want more, better, faster, and cheaper, and businesses work hard to accommodate them. Businesses have changed from body shops to think tanks, well-managed teamwork has shifted into empowered and self-directed work teams, and the role of leadership has changed from managing people to managing minds. And why not The average corporate profitability happens to be approximately equal to the average use of a person s brainpower, or about 10 percent. In the past, might was right, and the mightiest or the largest one won. In the future, wise is right, and the wisest leaders are going to be successful.

Figure 12-4

name of the CD. You can create an INSERT statement that pulls the name of the CD from the TITLES_INVENTORY table and inserts that value into the TITLE_TYPES table, as shown in the following example:

INSERT INTO TITLE_TYPES VALUES ( ( SELECT TITLE FROM TITLES_INVENTORY WHERE TITLE_ID = 108 ), 'Popular' );

Notice that the subquery appears as one of the values in the VALUES clause. The subquery returns the value of Both Sides Now. This value and the value Popular are inserted into the TITLE_TYPES table. For the most part, using a subquery in an INSERT statement is a relatively simple process. However, you must be sure that your subquery returns only one value; otherwise, you will receive an error. In addition, the value must be compatible with the data type and any other constraints defined on the target column.

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Private Sub Sort_Array(x() As Single, n As Integer) Dim Temp As Single Dim i As Integer, j As Integer For i = 0 To n - 1 For j = i + 1 To n If (x(j) < x(i)) Then Temp = x(i) x(i) = x(j) x(j) = Temp End If Next j Next i End Sub

Figure 11-1 shows the changes taking place that affect the corporate world as well as the leadership. Leading in the past looked more like managing a business that was materialdependent, where the cost of goods was significant. Instead, the leadership of today and the future must be prepared to handle more intellectual resources in addition to the material resources. The recent fallout in the leadership at several large corporations can be attributed to the wrong expectations that society sets for our leaders. The size of the company, growth at any cost, and the financial power of the CEO became the measures of leadership success in the business community. Everyone wants to bootstrap a business with someone else s money. There were times when other people s money was handled with care and returned with interest by businesses. Now Other People s Money, known as OPM (pronounced as the word opium), is used as a virtual drug to get the leadership

to the TITLE value, the TITLE value in the row being evaluated (in the subquery) must match the CD_NAME value in order for that row to be returned. For example, the first row in the COMPACT_DISC_INVENTORY table contains a CD_NAME value of Famous Blue Raincoat. When this row is tested against the EXISTS predicate, the Famous Blue Raincoat value is matched with the Famous Blue Raincoat value of the TITLE column in the COMPACT_DISC_ARTISTS table. In addition, the Joni Mitchell value is matched against the ARTIST value for the Famous Blue Raincoat row. Because the ARTIST value is Jennifer Warnes, and not Joni Mitchell, the search condition specified in the subquery WHERE clause evaluates to false, so no subquery row is returned for the Famous Blue Raincoat row. As a result, the WHERE clause in the main SELECT statement evaluates to false for the Famous Blue Raincoat row of the COMPACT_DISC_INVENTORY table, and the row is not included in the query results. This process is repeated for each row in the COMPACT_DISC_INVENTORY table. If the WHERE clause in the subquery evaluates to true, then the EXISTS predicate evaluates to true, which means that the WHERE clause in the main SELECT statement evaluates to true. In the case of our last example SELECT statement, only two rows meet this criteria.

It does not matter what columns or how many columns you specify in the SELECT clause of the subquery in an EXISTS predicate. This type of predicate is concerned only with whether rows are being returned, rather than the content of those rows. You can specify any column names or just an asterisk.

The EXISTS predicate, as you might expect, allows you to test the inverse of the predicate condition by using the NOT keyword:

SELECT FROM WHERE ( * COMPACT_DISC_INVENTORY NOT EXISTS SELECT TITLE FROM COMPACT_DISC_ARTISTS WHERE ARTIST = 'Joni Mitchell' AND COMPACT_DISC_INVENTORY.CD_NAME = COMPACT_DISC_ARTISTS.TITLE );

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