Hi @HarshadReddy Pednekar,
Yes, you can. But you need to consider limitations of Express edition, DB size is one as VaibhavChaudhari mentioned, etc. You need to make sure you are not using any "standard specific" features. You can run following script to check if database using any edition specific features.
Use DBname
Go
select * from sys.dm_db_persisted_sku_features
Go
If above query returns no results that means you are not using any feature standard edition specific.
Best regards,
Cathy
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