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There are two tables. The first Table Reader contains information about the readers of the library. Table fields: LibraryCardNumber, Readersurname, Readername, Readerpatronymic, Birthdate, Address, Phone...
Try to use the listagg function. It is necessary to get the values ​​of the column without repetitions. Is it possible without creating additional...
I use to execute on a remote .bat machine that calls SQL * Plus and executes the script. Only the result is written in...
What kind of request to verify that the values ​​in the column are rounded, for example, up to 3 characters after the comma? Or...

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