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(UPPER(DATA_TYPE) = 'INT',REPLACE(SUBSTRING_INDEX(UPPER(COLUMN_TYPE),')',1),'INT','INTEGER'),UPPER(COLUMN_TYPE)),') UNSIGNED NOT NULL AUTO_INCREMENT;')FROM information_schema.COLUMNSWHERE TABLE_SCHEMA = 'source_database_name' ANDEXTRA = UPPER('AUTO_INCREMENT')ORDER BY TABLE_NAME ASC |
2. 导出所有索引：
| SELECTCONCAT('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.STATISTICSWHERE TABLE_SCHEMA = 'pbq'GROUP BY TABLE_NAME, INDEX_NAMEORDER BY TABLE_NAME ASC, INDEX_NAME ASC |
3. 创建删除所有自增字段：
| SELECTCONCAT('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.COLUMNSWHERE TABLE_SCHEMA = 'destination_database_name' ANDEXTRA = UPPER('AUTO_INCREMENT')ORDER BY TABLE_NAME ASC |
4. 删除库所有索引：
| SELECTCONCAT('ALTER TABLE `',TABLE_NAME,'` ',GROUP_CONCAT(DISTINCTCONCAT('DROP ',IF(UPPER(INDEX_NAME) = 'PRIMARY','PRIMARY KEY',CONCAT('INDEX `', INDEX_NAME, '`')))SEPARATOR ', '),';')FROM information_schema.STATISTICSWHERE TABLE_SCHEMA = 'destination_database_name'GROUP BY TABLE_NAMEORDER 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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