Using String to Select From

Question

So I've got a tables being imported daily from firebase and I'm exporting them from google cloud to power bi. The naming schema stays roughly the same, the only thing that changes daily is the date at the end of the table name. Been trying to create a query that makes the process fully automated, but I've been stuck. The concat is correct, but the string doesn't work to call from. Help is appreciated.

DECLARE Query STRING(100);
SET Query = CONCAT("report-viewer.analytics_278375497.events_", FORMAT_DATE("%Y%m%d", CURRENT_DATE()));

SELECT  
    //Various stuff

FROM Query LIMIT 1000

Answer 1

You should use EXECUTE IMMEDIATE in this scenario

Using your particular simplified example - it could look like below

DECLARE table_reference STRING(100);

SET table_reference = 'report-viewer.analytics_278375497.events_' || FORMAT_DATE('%Y%m%d', CURRENT_DATE());

EXECUTE IMMEDIATE (
'''SELECT  //Various stuff
FROM `''' || table_reference || '''` LIMIT 1000
''');