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it should be used by a small team first, so that they can identify the best steps that the tool can be used

select * from persons where firstname='peter'

go through www . w3schools . com/sql you will find beginner course
all the best

you need to create foreign key in the relational table. you can make relational connection when you are creating a table or even useing alter table statement
exp
altertable table_name
add foreign...