MySQL导出所有Index和约束的方法
本文汇总了MySQL导出所有Index 和 约束的方法，提供给大家以方便大家查询使用。具体如下： 1. 导出创建自增字段语句： SELECTCONCAT('ALTER TABLE ',TABLE_NAME,' ','MODIFY COLUMN ',COLUMN_NAME,' ',IF
本文汇总了MySQL导出所有Index 和 约束的方法，提供给大家以方便大家查询使用。具体如下：
1. 导出创建自增字段语句：
SELECT
CONCAT(
'ALTER TABLE ', TABLE_NAME, ' ',
'MODIFY COLUMN ', COLUMN_NAME, ' ',
IF(UPPER(DATA_TYPE) = 'INT',
REPLACE(
SUBSTRING_INDEX(
UPPER(COLUMN_TYPE),
')',
1
),
'INT',
'INTEGER'
),
UPPER(COLUMN_TYPE)
),
') UNSIGNED NOT NULL AUTO_INCREMENT;'
)
FROM information_schema.COLUMNS
WHERE TABLE_SCHEMA = 'source_database_name' AND
EXTRA = UPPER('AUTO_INCREMENT')
ORDER BY TABLE_NAME ASC
2. 导出所有索引：
SELECT
CONCAT('ALTER TABLE ',TABLE_NAME,' ', 'ADD ',
IF(NON_UNIQUE = 1,
CASE UPPER(INDEX_TYPE)
WHEN 'FULLTEXT' THEN 'FULLTEXT INDEX'
WHEN 'SPATIAL' THEN 'SPATIAL INDEX'
ELSE CONCAT('INDEX ', INDEX_NAME, ' USING ',
INDEX_TYPE
)
END,
IF(UPPER(INDEX_NAME) = 'PRIMARY',
CONCAT('PRIMARY KEY USING ',
INDEX_TYPE
),
CONCAT('UNIQUE INDEX ', INDEX_NAME, ' USING ',
INDEX_TYPE
)
)
),'(', GROUP_CONCAT(DISTINCT CONCAT('', COLUMN_NAME, '') ORDER BY SEQ_IN_INDEX ASC SEPARATOR ', '), ');') AS 'Show_Add_Indexes'
FROM information_schema.STATISTICS
WHERE TABLE_SCHEMA = 'pbq'
GROUP BY TABLE_NAME, INDEX_NAME
ORDER BY TABLE_NAME ASC, INDEX_NAME ASC
3. 创建删除所有自增字段：
SELECT
CONCAT(
'ALTER TABLE ', TABLE_NAME, ' ',
'MODIFY COLUMN ', COLUMN_NAME, ' ',
IF(UPPER(DATA_TYPE) = 'INT',
REPLACE(
SUBSTRING_INDEX(
UPPER(COLUMN_TYPE),
')',
1
),
'INT',
'INTEGER'
),
UPPER(COLUMN_TYPE)
),
') UNSIGNED NOT NULL;'
)
FROM information_schema.COLUMNS
WHERE TABLE_SCHEMA = 'destination_database_name' AND
EXTRA = UPPER('AUTO_INCREMENT')
ORDER BY TABLE_NAME ASC
4. 删除库所有索引：
SELECT
CONCAT(
'ALTER TABLE ', TABLE_NAME, ' ',
GROUP_CONCAT(
DISTINCT
CONCAT(
'DROP ',
IF(UPPER(INDEX_NAME) = 'PRIMARY',
'PRIMARY KEY',
CONCAT('INDEX ', INDEX_NAME, '')
)
)
SEPARATOR ', '
),
';'
)
FROM information_schema.STATISTICS
WHERE TABLE_SCHEMA = 'destination_database_name'
GROUP BY TABLE_NAME
ORDER BY TABLE_NAME ASC
希望本文所述示例能够对大家有所帮助。
