Questo articolo contiene il ALTER DATABASE di SQL sintassi, come implementato da vari sistemi di gestione di database (DBMS). La sintassi è elencata esattamente come l'ha elencata ogni fornitore sul proprio sito Web. Fare clic sul collegamento applicabile per visualizzare maggiori dettagli sulla sintassi per un particolare fornitore.
I DBMS coperti sono MySQL, SQL Server, PostgreSQL e Oracle Database.
MySQL
Dal manuale di riferimento di MySQL 5.7:
ALTER {DATABASE | SCHEMA} [db_name]
alter_specification ...
ALTER {DATABASE | SCHEMA} db_name
UPGRADE DATA DIRECTORY NAME
alter_specification:
[DEFAULT] CHARACTER SET [=] charset_name
| [DEFAULT] COLLATE [=] collation_name SQL Server
Dal riferimento Transact-SQL:
ALTER DATABASE { database_name | CURRENT }
{
MODIFY NAME = new_database_name
| COLLATE collation_name
| <file_and_filegroup_options>
| <set_database_options>
}
[;]
<file_and_filegroup_options >::=
<add_or_modify_files>::=
<filespec>::=
<add_or_modify_filegroups>::=
<filegroup_updatability_option>::=
<set_database_options>::=
<optionspec>::=
<auto_option> ::=
<change_tracking_option> ::=
<cursor_option> ::=
<database_mirroring_option> ::=
<date_correlation_optimization_option> ::=
<db_encryption_option> ::=
<db_state_option> ::=
<db_update_option> ::=
<db_user_access_option> ::=
<external_access_option> ::=
<FILESTREAM_options> ::=
<HADR_options> ::=
<parameterization_option> ::=
<recovery_option> ::=
<service_broker_option> ::=
<snapshot_option> ::=
<sql_option> ::=
<termination> ::= PostgreSQL
Dal manuale di PostgreSQL 9.5:
ALTER DATABASE name [ [ WITH ] option [ ... ] ]
where option can be:
ALLOW_CONNECTIONS allowconn
CONNECTION LIMIT connlimit
IS_TEMPLATE istemplate
ALTER DATABASE name RENAME TO new_name
ALTER DATABASE name OWNER TO { new_owner | CURRENT_USER | SESSION_USER }
ALTER DATABASE name SET TABLESPACE new_tablespace
ALTER DATABASE name SET configuration_parameter { TO | = } { value | DEFAULT }
ALTER DATABASE name SET configuration_parameter FROM CURRENT
ALTER DATABASE name RESET configuration_parameter
ALTER DATABASE name RESET ALL Database Oracle
Dalla documentazione online di Oracle Database 12c Versione 1 (12.1):
ALTER DATABASE [ database ]
{ startup_clauses
| recovery_clauses
| database_file_clauses
| logfile_clauses
| controlfile_clauses
| standby_database_clauses
| default_settings_clauses
| instance_clauses
| security_clause
} ; Quanto segue delinea il dettaglio delle varie clausole.
clausole_di_avvio::=
{ MOUNT [ { STANDBY | CLONE } DATABASE ]
| OPEN
{ [ READ WRITE ]
[ RESETLOGS | NORESETLOGS ]
[ UPGRADE | DOWNGRADE ]
| READ ONLY
}
} clausole_di_recupero ::=
{ general_recovery
| managed_standby_recovery
| BEGIN BACKUP
| END BACKUP
} recupero_generale ::=
RECOVER
[ AUTOMATIC ]
[ FROM 'location' ]
{ { full_database_recovery
| partial_database_recovery
| LOGFILE 'filename'
}
[ { TEST
| ALLOW integer CORRUPTION
| parallel_clause
}...
]
| CONTINUE [ DEFAULT ]
| CANCEL
} full_database_recovery ::=
[ STANDBY ] DATABASE
[ { UNTIL { CANCEL
| TIME date
| CHANGE integer
| CONSISTENT
}
| USING BACKUP CONTROLFILE
| SNAPSHOT TIME date
}...
] recupero_database_parziale::=
{ TABLESPACE tablespace [, tablespace ]...
| DATAFILE { 'filename' | filenumber }
[, 'filename' | filenumber ]...
} clausola_parallela::=
{ NOPARALLEL | PARALLEL [ integer ] } managed_standby_recovery::=
RECOVER
{ MANAGED STANDBY DATABASE
[ { USING ARCHIVED LOGFILE
| DISCONNECT [FROM SESSION]
| NODELAY
| UNTIL CHANGE integer
| UNTIL CONSISTENT
| parallel_clause
}...
| FINISH
| CANCEL
]
| TO LOGICAL STANDBY { db_name | KEEP IDENTITY }
} clausole_file_database ::=
{ RENAME FILE 'filename' [, 'filename' ]...
TO 'filename'
| create_datafile_clause
| alter_datafile_clause
| alter_tempfile_clause
| move_datafile_clause
} create_datafile_clause::=
CREATE DATAFILE
{ 'filename' | filenumber }
[, 'filename' | filenumber ]...
}
[ AS { file_specification
[, file_specification ]...
| NEW
}
] alter_datafile_clause::=
DATAFILE
{ 'filename' | filenumber }
[, 'filename' | filenumber ]...
}
{ ONLINE
| OFFLINE [ FOR DROP ]
| RESIZE size_clause
| autoextend_clause
| END BACKUP
}
alter_tempfile_clause::=
TEMPFILE
{ 'filename' [, 'filename' ]...
| filenumber [, filenumber ]...
}
{ RESIZE size_clause
| autoextend_clause
| DROP [ INCLUDING DATAFILES ]
| ONLINE
| OFFLINE
} move_datafile_clause::=
MOVE DATAFILE ( 'filename' | 'ASM_filename' | file_number ) [ TO ( 'filename' | 'ASM_filename' ) ] [ REUSE ] [ KEEP ]
ASM_nomefile::=
{ fully_qualified_file_name
| numeric_file_name
| incomplete_file_name
| alias_file_name
} autoextend_clause ::=
AUTOEXTEND
{ OFF
| ON [ NEXT size_clause ]
[ maxsize_clause ]
} clausola_maxsize::=
MAXSIZE { UNLIMITED | size_clause } clausole_logfile ::=
{ { ARCHIVELOG [ MANUAL ]
| NOARCHIVELOG
}
| [ NO ] FORCE LOGGING
| RENAME FILE 'filename' [, 'filename' ]...
TO 'filename'
| CLEAR [ UNARCHIVED ]
LOGFILE logfile_descriptor [, logfile_descriptor ]...
[ UNRECOVERABLE DATAFILE ]
| add_logfile_clauses
| drop_logfile_clauses
| switch_logfile_clause
| supplemental_db_logging
} add_logfile_clauses::=
ADD [ STANDBY ] LOGFILE
{
{ [ INSTANCE 'instance_name' ] | [ THREAD 'integer' ] }
[ GROUP integer ] redo_log_file_spec
[, [ GROUP integer ] redo_log_file_spec ]...
| MEMBER 'filename' [ REUSE ] [, 'filename' [ REUSE ] ]...
TO logfile_descriptor [, logfile_descriptor ]...
} drop_logfile_clauses::=
DROP [ STANDBY ] LOGFILE
{ logfile_descriptor
[, logfile_descriptor ]...
| MEMBER 'filename'
[, 'filename' ]...
} switch_logfile_clause::=
SWITCH ALL LOGFILES TO BLOCKSIZE integer
supplemental_db_logging ::=
{ ADD | DROP } SUPPLEMENTAL LOG
{ DATA
| supplemental_id_key_clause
| supplemental_plsql_clause
} clausola_chiave_id_supplementare::=
DATA
( { ALL | PRIMARY KEY | UNIQUE | FOREIGN KEY }
[, { ALL | PRIMARY KEY | UNIQUE | FOREIGN KEY } ]...
)
COLUMNS clausola_plsql_supplementare::=
DATA FOR PROCEDURAL REPLICATION
logfile_descriptor::=
{ GROUP integer
| ('filename' [, 'filename' ]...)
| 'filename'
} controlfile_clauses ::=
CREATE { [ LOGICAL | PHYSICAL ] STANDBY | FAR SYNC INSTANCE }
CONTROLFILE AS
'filename' [ REUSE ]
| BACKUP CONTROLFILE TO
{ 'filename' [ REUSE ]
| trace_file_clause
} clausole_standby_database ::=
{ { activate_standby_db_clause
| maximize_standby_db_clause
| register_logfile_clause
| commit_switchover_clause
| start_standby_clause
| stop_standby_clause
| convert_database_clause
} [ parallel_clause ] }
|
{ switchover_clause | failover_clause } activate_standby_db_clause::=
ACTIVATE
[ PHYSICAL | LOGICAL ]
STANDBY DATABASE
[ FINISH APPLY ] maximize_standby_db_clause::=
SET STANDBY DATABASE TO MAXIMIZE
{ PROTECTION | AVAILABILITY | PERFORMANCE } register_logfile_clause::=
REGISTER [ OR REPLACE ] [ PHYSICAL | LOGICAL ] LOGFILE [ file_specification [, file_specification ]... [ FOR logminer_session_name ]
clausola_commutazione::=
SWITCHOVER TO target_db_name [ VERIFY | FORCE ]
clausola_failover::=
FAILOVER TO target_db_name [ FORCE ]
commit_switchover_clause::=
{ PREPARE | COMMIT } TO SWITCHOVER
[ TO { { [ PHYSICAL | LOGICAL ] PRIMARY
| [ PHYSICAL ] STANDBY
} [ { WITH | WITHOUT } SESSION SHUTDOWN
{ WAIT | NOWAIT }
]
| LOGICAL STANDBY
}
| CANCEL
] start_standby_clause::=
START LOGICAL STANDBY APPLY
[ IMMEDIATE ]
[ NODELAY ]
[ NEW PRIMARY dblink
| INITIAL [ scn_value ]
| { SKIP FAILED TRANSACTION | FINISH }
] stop_standby_clause::=
{ STOP | ABORT } LOGICAL STANDBY APPLY convert_database_clause::=
CONVERT TO ( PHYSICAL | SNAPSHOT ) STANDBY
default_settings_clauses::=
{ DEFAULT EDITION = edition_name
| SET DEFAULT { BIGFILE | SMALLFILE } TABLESPACE
| DEFAULT TABLESPACE tablespace
| DEFAULT TEMPORARY TABLESPACE { tablespace | tablespace_group_name }
| RENAME GLOBAL_NAME TO database.domain [.domain ]...
| ENABLE BLOCK CHANGE TRACKING [ USING FILE 'filename' [ REUSE ] ]
| DISABLE BLOCK CHANGE TRACKING
| [NO] FORCE FULL DATABASE CACHING
| flashback_mode_clause
| set_time_zone_clause
} set_time_zone_clause::=
SET TIME_ZONE =
'{ { + | - } hh : mi | time_zone_region }' flashback_mode_clause ::=
FLASHBACK { ON | OFF } clausole_istanza::=
{ ENABLE | DISABLE } INSTANCE 'instance_name' clausola_di_sicurezza ::=
GUARD { ALL | STANDBY | NONE } Utilizzo della GUI
La maggior parte dei DBMS ti consente di modificare i database utilizzando la GUI. Potrebbe trattarsi di una GUI fornita con il prodotto o di una sviluppata da terze parti. Ad esempio, MySQL Workbench è uno strumento GUI che può essere utilizzato con MySQL.
