Microsoft SQL Server 2008 R2 Dokumentacja Pobierz pdf (Strona 220)

200 CHAPTER 10 Self-Service Analysis with PowerPivot

report, provide a name for the current PivotTable if you want, and then specify the formula

for the measure, as shown in Figure 10-11.

FIGURE 10-11 Measure settings

DAX Functions

The examples shown for a calculated column and a measure are very basic, although repre-

sentative of the common ways that you would use DAX. Table 10-1 lists the types of functions

that DAX provides:

TABLE 10-1 DAX Function Types

FUNCTION TYPE EXAMPLE DESCRIPTION

Date and time

=WEEKDAY([OrderDate],1)

Returns the number of the weekday

where Sunday = 1 and Saturday = 7

Filter and value

=FILTER(ProductSubcategory,

[EnglishProductSubcategoryName]

= "Road Bikes")

Returns a subset of a table based

on the lter expression

Information

=IsNumber([OrderQuantity])

Returns TRUE if the value is numeric

and FALSE if it is not

Logical

=IF([OrderQuantity]<10,"low",

IF([OrderQuantity]<100,"medium"

,"high"))

Returns the second argument’s

value if the rst argument’s condi-

tion is TRUE and otherwise returns

the third argument’s value

Math and trig

=ROUND([SalesAmount] *

[DiscountAmount],2)

Returns the value of the rst argu-

ment rounded to the number of

digits specied in second argument

1 2 ... 215 216 217 218 219 220 221 222 223 224 225 ... 235 236

Brak uwag

Microsoft SQL Server 2008 R2 Dokumentacja Strona 220