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。
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