查询以仅从单元格中获取数字 - 雪花

Question

I have a huge column in Snowflake named "AGE" and 5% of the rows have values like ">80".

I want to filter by people with AGE between [40 55] and I am facing an error "Numeric value '>80' is not recognized".

I was trying to filter using something like "where ISNUMERIC(PAT_AGE_YR_NBR)=1" but ISNUMERIC is not recognized in Snowflake. I want to either:

• select the rows that are only numerical or
• retrieve the value out of them, like in the case ">80", I want to filter by only the numerical part of the cell, "80".

Any ideas? cheers

Answer 1

1. For the first part you can use TRY_TO_NUMERIC function as detailed in the mentioned documentation.

2. And then from the result you may then do a filter for the values where NULL is coming and have only the specific results listed.

For eg:

select try_to_numeric(col) as a from numtest where a IS NOT NULL and a > 10;

Answer 2

Use a TRY_ function:

WHERE TRY_CAST(PAT_AGE_YR_NBR AS INT) between 40 and 55