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| Как проще всего поменять местами столбцы в таблице?
(Не теряя данных, конечно) | |
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для: Eugene77
(04.02.2010 в 19:06)
| | оператором ALTER | |
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для: Trianon
(04.02.2010 в 19:19)
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ALTER TABLE Syntax:
ALTER [ONLINE | OFFLINE] [IGNORE] TABLE tbl_name
alter_specification [, alter_specification] ...
alter_specification:
table_option ...
| ADD [COLUMN] col_name column_definition
[FIRST | AFTER col_name ]
| ADD [COLUMN] (col_name column_definition,...)
| ADD {INDEX|KEY} [index_name]
[index_type] (index_col_name,...) [index_option] ...
| ADD [CONSTRAINT [symbol]] PRIMARY KEY
[index_type] (index_col_name,...) [index_option] ...
| ADD [CONSTRAINT [symbol]]
UNIQUE [INDEX|KEY] [index_name]
[index_type] (index_col_name,...) [index_option] ...
| ADD FULLTEXT [INDEX|KEY] [index_name]
(index_col_name,...) [index_option] ...
| ADD SPATIAL [INDEX|KEY] [index_name]
(index_col_name,...) [index_option] ...
| ADD [CONSTRAINT [symbol]]
FOREIGN KEY [index_name] (index_col_name,...)
reference_definition
| ALTER [COLUMN] col_name {SET DEFAULT literal | DROP DEFAULT}
| CHANGE [COLUMN] old_col_name new_col_name column_definition
[FIRST|AFTER col_name]
| MODIFY [COLUMN] col_name column_definition
[FIRST | AFTER col_name]
| DROP [COLUMN] col_name
| DROP PRIMARY KEY
| DROP {INDEX|KEY} index_name
| DROP FOREIGN KEY fk_symbol
| DISABLE KEYS
| ENABLE KEYS
| RENAME [TO] new_tbl_name
| ORDER BY col_name [, col_name] ...
| CONVERT TO CHARACTER SET charset_name [COLLATE collation_name]
| [DEFAULT] CHARACTER SET [=] charset_name [COLLATE [=] collation_name]
| DISCARD TABLESPACE
| IMPORT TABLESPACE
| partition_options
| ADD PARTITION (partition_definition)
| DROP PARTITION partition_names
| COALESCE PARTITION number
| REORGANIZE PARTITION [partition_names INTO (partition_definitions)]
| ANALYZE PARTITION partition_names
| CHECK PARTITION partition_names
| OPTIMIZE PARTITION partition_names
| REBUILD PARTITION partition_names
| REPAIR PARTITION partition_names
| REMOVE PARTITIONING
index_col_name:
col_name [(length)] [ASC | DESC]
index_type:
USING {BTREE | HASH | RTREE}
index_option:
KEY_BLOCK_SIZE [=] value
| index_type
| WITH PARSER parser_name
| COMMENT 'string'
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И что тут использовать?
(Мне без потери данных хотелось бы)
Вт это похоже:
| CHANGE [COLUMN] old_col_name new_col_name column_definition
[FIRST|AFTER col_name]
| MODIFY [COLUMN] col_name column_definition
[FIRST | AFTER col_name]
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Но не ясно как использовать.
Можно примерчик? | |
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для: Eugene77
(06.02.2010 в 12:38)
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ALTER TABLE `books`
MODIFY COLUMN
`date` DATE NOT NULL
AFTER `title`
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Лентяй Вы, Евгений, каких поискать. | |
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для: Trianon
(06.02.2010 в 13:04)
| | Спасибо!
Точно, мог бы и сам догадаться. | |
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для: Trianon
(06.02.2010 в 13:04)
| | А кук сделать такую замену в ПМА ,в операциях такого пункта не найдено? | |
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для: oliss
(07.02.2010 в 15:21)
| | SQL-запросом :)
Искал. Не нашел. Возможно, в более свежих версиях есть. | |
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