How to create a flag from regular expressions in Microsoft SQL Server?

mrzz3bfm 于 2023-10-15 发布在 SQL Server

关注(0)|答案(1)|浏览(133)

I have a dataset with IDs and a phone number as a string. I need to build a flag to show if the string is in a valid format.

Here's a dummy dataset.

CREATE TABLE Test 
(
    ID int, 
    Cell varchar(11)
) 

INSERT INTO Test (ID, Cell) 
VALUES (1, '07123456789'), 
       (2, '441234567');

For now, a simple flag that indicates it started with a 0, for example, would be a good starting point for me. I've managed to figure out that Cell LIKE '^0%' should make that work, but I can't figure out how to build it into a Boolean flag.

Thanks for any insights.

sql-server

来源：https://stackoverflow.com/questions/77235957/how-to-create-a-flag-from-regular-expressions-in-microsoft-sql-server

1条答案

按热度按时间

kxkpmulp1#

You use a case expression (or inline-if) for this:

Select case when Cell like '0%' then 1 else 0 end as MyFlag
from...

Select iif(Cell like '0%', 1, 0) as MyFlag
from...

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How to create a flag from regular expressions in Microsoft SQL Server?

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