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We can and database servers to establish a connection (you provide the user name and password are correct), but we can not opt shwx1989_zxq_shwx1989 database.
You acknowledge that the database exist?
79787_shwx1989 you to confirm the user has permission to use shwx1989_zxq_shwx1989 database?
In some systems the name of your database may also contain your user name prefix, for example, username_shwx1989_zxq_shwx1989, will not be a problem here?
Contact your host administrator. If all methods do not solve your problem, you can seek help on the WordPress Support Forums.
How get the database permission