How do I import a sql file into pgAdmin4 ?

[Karen Goh <karenworld@xxxxxxxxx>]

Hi,

I need to migrate to postgreSQL using SQL flat files which contains a few thousands rows of data.

So far, I have attempted but not successful.  Not sure if it can't be done using pgAdmin4.

And posting to Stackoverflow superUser doesn't help as there is no reply at all.

Hence, I hope to get some help here.

Thanks & regards,
Karen