数据库如何创建，维护，优化注意事项

SELECT

a.TABLE_NAME,b.TABLE_COMMENT,a.COLUMN_NAME,a.COLUMN_TYPE,a.COLUMN_COMMENT

FROM

information_schema.COLUMNS a

JOIN information_schema.TABLES b ON a.TABLE_SCHEMA = b.TABLE_SCHEMA

AND a.TABLE_NAME = b.TABLE_NAME

WHERE

a.TABLE_NAME LIKE 'lm_%'



ps:大的列通过MD5编码后对MD5查询