Problem:
Whenever yo have blank values in a column when you try to convert that using data conversion it will throw an error. How to resolver this
Solution
Step-1 -> Create a derived column Column
Breakdown of the Expression:
ISNULL([Latest Score]):
- This part of the expression checks if the value in the
Latest Score
column is null. ISNULL
is a function that returns TRUE
if the value is null and FALSE
otherwise.
TRIM([Latest Score]) == "":
- This part of the expression checks if the value in the
Latest Score
column is a blank string (i.e., an empty string). TRIM
is a function that removes leading and trailing spaces from the string.- The comparison
== ""
checks if the trimmed value is an empty string.
||:
- This is the logical OR operator.
- The expression
ISNULL([Latest Score]) || TRIM([Latest Score]) == ""
evaluates to TRUE
if either the value is null or it is a blank string.
? 0 : (DT_NUMERIC, 10, 2) [Latest Score]:
- This is a conditional (ternary) operator.
- The syntax is
condition ? value_if_true : value_if_false
. - If the condition
ISNULL([Latest Score]) || TRIM([Latest Score]) == ""
is TRUE
, the expression returns 0
. - If the condition is
FALSE
, the expression converts the value in the Latest Score
column to a numeric data type with a precision of 10 and a scale of 2.
Putting It All Together:
Condition: ISNULL([Latest Score]) || TRIM([Latest Score]) == ""
- Checks if the
Latest Score
is either null or a blank string.
True Case: 0
- If the condition is true (i.e., the value is null or blank), the expression returns
0
.
False Case: (DT_NUMERIC, 10, 2) [Latest Score]
- If the condition is false (i.e., the value is neither null nor blank), the expression converts the value to a numeric data type with a precision of 10 and a scale of 2.
Handle Null and Blank Values:
- Use a
Derived Column
transformation to handle null and blank values before the data conversion. - Replace null or blank values with default values that are compatible with the destination data type.
Example Steps:
Add Derived Column Transformation:
- Drag and drop a
Derived Column
transformation from the SSIS Toolbox onto the Data Flow design surface. - Connect the output of the source component to the
Derived Column
transformation.
Configure Derived Column Transformation:
Example Configuration:
Additional Tips: