Convert date in date type, not string

[giuliapiazza94]

Hi guys,

i try to use report builder but i have some problems with data type. 

I've this query

When i try to filter date (for example date >= 01/01/2024), I can't to do this because it convert data in string. In power bi the field is date type, not string.

How can I convert the column in date type?

Thank you all 🙂

[Ankur04]

Hi @giuliapiazza94 ,

can you try using Cdate function in the expression.

please let me know if you need further support.

Thanks,

[v-yohua-msft]

Hi, @giuliapiazza94 

Based on your information, I create a sample Table:

Import to the Report Builder. Then right-click dataset.

In the query designer, you can use expressions to convert strings to date types. For example, if your date string is in the format "dd/MM/yyyy", you can use the following expression:

CONVERT(date, [DateString], 103)

Here, 103 is the style code used for the UK/France date format.

Converted query:

Insert a Table visual and click Run

If you want to use Cdate, you can right click text, select Expression.

Use the following code:

=CDate(Fields!DateString.Value)

Before:

After:

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[FarhanJeelani]

In Report Builder, if the date field `[Data]` is recognized as text, you can try explicitly converting it to a date format within your query or by using an expression in the filter. Here are two methods to achieve this:

Method 1: Modify the Query to Cast `[Data]` as a Date
If you have control over the query, try casting or converting the `[Data]` column to a date format directly in the query. The syntax will depend on your data source.

For example:
- SQL Server:

sql

SELECT
CAST([Data] AS DATE) AS [Data]
FROM
your_table

- DAX (if using Power BI):
DAX

EVALUATE
SELECTCOLUMNS(
your_table,
"Data", DATEVALUE([Data])
)

This approach ensures that `[Data]` is treated as a date field within Report Builder.

Method 2: Use an Expression in Report Builder to Convert Text to Date
If you cannot modify the query, use an expression in the Filter properties to convert `[Data]` to a date type before applying the filter:

1. In the filter properties, select `[Data]` as the Expression.
2. Change the data type to **Date/Time instead of Text.
3. In the Value field, enter your date filter in the appropriate format (e.g., `1/1/2024` or `01/01/2024` depending on your locale).

Alternatively, if you need more complex date filtering in Report Builder, you can use an expression like:
VB
=CDate(Fields!Data.Value)
This expression will convert `[Data]` to a date type, allowing you to apply date comparisons directly.

Let me know if you encounter any issues with these methods!