title | description | author | ms.author | ms.date | ms.service | ms.subservice | ms.topic | f1_keywords | helpviewer_keywords | ||
---|---|---|---|---|---|---|---|---|---|---|---|
Expression Builder |
Expression Builder |
chugugrace |
chugu |
03/01/2017 |
sql |
integration-services |
conceptual |
|
|
[!INCLUDEsqlserver-ssis]
Use the Expression Builder dialog box to create and edit a property expression or write the expression that sets the value of a variable using a graphical user interface that lists variables and provides a built-in reference to the functions, type casts, and operators that the [!INCLUDEssISnoversion] expression language includes.
A property expression is an expression that is assigned to a property. When the expression is evaluated, the property is dynamically updated to use the evaluation result of the expression. Likewise, an expression that is used in a variable enables the variable value to be updated with the evaluation result of the expression.
There are many ways to use expressions:
-
Tasks Update the To line that a Send Mail task uses by inserting an e-mail address that is stored in a variable; or update the Subject line by concatenating a string such as "Sales for: " and the current date returned by the GETDATE function.
-
Variables Set the value of a variable to the current month by using an expression like
DATEPART("mm",GETDATE())
; or set the value of a string by concatenating the string literal and the current date by using the expression"Today's date is " + (DT_WSTR,30)(GETDATE())
. -
Connection Managers Set the code page of a Flat File connection manager by using a variable that contains a different code page identifier; or specify the number of rows in the data file to skip by entering a positive integer like 3 in the expression.
To learn more about property expressions and writing expressions, see Use Property Expressions in Packages and Integration Services (SSIS) Expressions.
Term | Definition |
---|---|
Variables | Expand the Variables folder and drag variables to the Expression box. |
Mathematical Functions String Functions Date/Time Functions NULL Functions Type Casts Operators |
Expand the folders and drag functions, type casts, and operators to the Expression box. |
Expression | Edit or type an expression.` |
Evaluated value | Lists the evaluation result of the expression. |
Evaluate Expression | Click Evaluate Expression to view the evaluation result of the expression. |
Expressions Page
Property Expressions Editor
Integration Services (SSIS) Variables
System Variables