topic Re: Dataset diasble NULL values in column in SAS Programming

Dataset diasble NULL values in column

Matt3 — Mon, 04 Sep 2017 20:30:02 GMT

Hi,

can I disable adding rows in which some variables are missing into my dataset?

Thanks

Re: Dataset diasble NULL values in column

PeterClemmensen — Mon, 04 Sep 2017 20:17:10 GMT

When do you experience null values being inserted into your data?

Re: Dataset diasble NULL values in column

Matt3 — Mon, 04 Sep 2017 20:28:30 GMT

Haha good point, I mean inserted rows with some columns that contains missing values.

Re: Dataset diasble NULL values in column

Patrick — Mon, 04 Sep 2017 21:24:47 GMT

@Matt3

Use a WHERE clause where you exclude all observations having one or multiple variables with missing values.

You can use the CMISS() function for such a test.

http://support.sas.com/documentation/cdl/en/lefunctionsref/69762/HTML/default/viewer.htm#p1tth4ltf640din1ey86ubo2lky2.htm

Re: Dataset diasble NULL values in column

Matt3 — Mon, 04 Sep 2017 21:36:44 GMT

I dont need excluding observation but prevent from not inserting them.

I found integrity constrains in proc datasets, hovewer I cant find option for preventing observation from deleting.

Re: Dataset diasble NULL values in column

Patrick — Mon, 04 Sep 2017 21:43:17 GMT

@Matt3

Please explain in detail what you have and what you're trying to achieve so can understand your problem and give you a suitable answer.

Using Integrity Constraints will protect your table against Inserting/Updating rows with values you don't want. BUT if an integrity constraint gets hit your job will throw an error and fail. Is that what you want?

There are no integrity constraints for "do not delete" except for referential integrity which prevents deletion of parent records when there are dependent child records in another table.