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Soobramoney
Advocate I
Advocate I

Lakehouse table datatypes

Hi,

 

I have a Fabric Lakehouse table that contains all string data types. I need to load the data into a new table with the correct data types. When I use the copy data activity, I receive an error message stating that null values in string columns cannot be inserted into an int column. How can I update these columns with actual null values, or is there an easier way to load the data with the correct data types?

 

Thanks

1 ACCEPTED SOLUTION
Anonymous
Not applicable

Hi @Soobramoney ,

 

For this type of problem, you can make sure that the columns are defined with the correct data types when you create a new table, and allow null values if necessary.

The following demonstrates the successful insertion of a NULL value in a table:

CREATE TABLE [NullCheck1]
(
    col1 int not null,
    col2 VARCHAR(30) NULL,
    col3 VARCHAR(30) not NULL,
    col4 int NULL
)
GO


INSERT INTO [NullCheck1] VALUES (3,NULL,'NA',NULL)


select * from  [dbo].[NullCheck1]

vkongfanfmsft_0-1725331697443.png

vkongfanfmsft_1-1725331713970.png

vkongfanfmsft_3-1725331985808.png

 

vkongfanfmsft_2-1725331809500.png

Best Regards,
Adamk Kong

 

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

 

View solution in original post

1 REPLY 1
Anonymous
Not applicable

Hi @Soobramoney ,

 

For this type of problem, you can make sure that the columns are defined with the correct data types when you create a new table, and allow null values if necessary.

The following demonstrates the successful insertion of a NULL value in a table:

CREATE TABLE [NullCheck1]
(
    col1 int not null,
    col2 VARCHAR(30) NULL,
    col3 VARCHAR(30) not NULL,
    col4 int NULL
)
GO


INSERT INTO [NullCheck1] VALUES (3,NULL,'NA',NULL)


select * from  [dbo].[NullCheck1]

vkongfanfmsft_0-1725331697443.png

vkongfanfmsft_1-1725331713970.png

vkongfanfmsft_3-1725331985808.png

 

vkongfanfmsft_2-1725331809500.png

Best Regards,
Adamk Kong

 

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

 

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