May 2005
Intermediate to advanced
352 pages
14h 39m
English
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Name
ALTER DATABASE
Synopsis
ALTER DATABASE database
[DEFAULT] CHARACTER SET character_set |
[DEFAULT] CHARACTER SET character_set |
[DEFAULT] COLLATE collationUse this statement to alter settings for a database. Version 4.1.1
introduced this function and added a file named
db.opt containing the database settings to the
database directory. Currently, two options are available:
CHARACTER SET and COLLATE. Here
are the contents of a typical db.opt file:
default-character-set=latin1 default-collation=latin1_swedish_ci
The CHARACTER SET
option sets the first line, which specifies the default database
character set that will be used. The COLLATE
option sets the second line, which specifies the default database
collation. Here's an example of how you can use this
statement:
ALTER DATABASE human_resources CHARACTER SET latin2_bin COLLATE latin2_bin;
Notice that both options
may be given in one SQL statement. The DEFAULT
keyword is unnecessary, but is offered for compatibility with other
database systems. Beginning with Version 4.1.8 of MySQL, if the name
of the database is omitted from this SQL statement, the current
database will be assumed.
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