数据表名：
SELECT TABLE_NAME FROM information_schema.`TABLES` WHERE TABLE_SCHEMA =‘v53‘ AND TABLE_TYPE =‘BASE TABLE‘
数据表信息：
SELECT COLUMN_NAME ,IS_NULLABLE ,COLUMN_TYPE,COLUMN_KEY FROM information_schema.`COLUMNS` WHERE TABLE_SCHEMA =‘v53‘ AND TABLE_NAME =‘bi_user_info‘;
mysql Key值（PRI, UNI, MUL）的含义：
PRI主键约束 UNI唯一约束 MUL可以重复