![]() How to perform basic queries with `SELECT` with SQLite.Inserting and deleting data with SQLite.Creating and deleting databases and tables with SQLite.An introduction to MySQL column and table constraints.How to create and delete databases and tables in MySQL.How to manage privileges with roles in MySQL.How to use `GRANT` and `REVOKE` to manage privileges in MySQL.How to manage users and authentication in MySQL.An introduction to authorization and authentication in MySQL.An introduction to PostgreSQL column and table constraints.An introduction to PostgreSQL data types.How to create and delete databases and tables in PostgreSQL.Managing privileges in PostgreSQL with grant and revoke.Configuring PostgreSQL user authentication.Managing roles and role attributes in PostgreSQL. ![]() An introduction to authorization and authentication in PostgreSQL.How to configure a PostgreSQL database on RDS.Comparing relational and document databases.Glossary of common database terminology.Comparing database types: how database types evolved to meet different needs.Only superusers can change a setting for all roles in all databases. Ordinary roles can only set defaults for themselves. Roles with the CREATEROLE attribute can set the defaults for non-superuser roles. Superusers can change session defaults of any roles. Third, specify the configuration parameter and the new value in the SET clause.In case you omit the IN DATABASE clause, the change will be applied to all databases. Second, specify a database name after the IN DATABASE keyword to change only for sessions in the named database.You use the ALL option to change the settings for all roles. First, specify the name of the role that you want to modify the role’s session default, or use the CURRENT_USER, or SESSION_USER.SET configuration_param = Ĭode language: PostgreSQL SQL dialect and PL/pgSQL ( pgsql ) Second, create a new role called calf using the CREATE ROLE statement:ĪLTER ROLE role_name | CURRENT_USER | SESSION_USER | ALL Ordinal roles can only change their passwords.įirst, log in to the PostgreSQL using the postgres role.Roles that have the CREATEROLE attribute can change any of these attributes for only non-superusers and no-replication roles.Superusers can change any of those attributes for any role. ![]()
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